Merge branch 'next' into next_novolk

CMakeLists.txt

@@ -120,7 +120,7 @@ else(POLARSSL_FOUND)
     endif(BUILD_STATIC)
     add_definitions(-DHAVE_MBEDTLS)
   else(MBEDTLS_FOUND)
-    message(FATAL_ERROR "Either polarssl or mbedtls is required to compile srsLTE")
+    message(FATAL_ERROR "Either PolarSSL or mbedTLS are required to build srsLTE")
   endif (MBEDTLS_FOUND)
 endif(POLARSSL_FOUND)
 

cmake/modules/FindUHD.cmake

@@ -16,6 +16,7 @@ FIND_LIBRARY(
     HINTS $ENV{UHD_DIR}/lib
     PATHS /usr/local/lib
           /usr/lib
+          /usr/lib/x86_64-linux-gnu
           /usr/local/lib64
           /usr/local/lib32
 )

lib/examples/cell_measurement.c

@@ -241,19 +241,31 @@ int main(int argc, char **argv) {
   srslte_rf_stop_rx_stream(&rf);
   srslte_rf_flush_buffer(&rf);
   
-  if (srslte_ue_sync_init_multi(&ue_sync, cell, srslte_rf_recv_wrapper, 1, (void*) &rf)) {
+  if (srslte_ue_sync_init_multi(&ue_sync, cell.nof_prb, cell.id==1000, srslte_rf_recv_wrapper, 1, (void*) &rf)) {
     fprintf(stderr, "Error initiating ue_sync\n");
     return -1; 
   }
-  if (srslte_ue_dl_init(&ue_dl, cell, 1)) {
+  if (srslte_ue_sync_set_cell(&ue_sync, cell)) {
+    fprintf(stderr, "Error initiating ue_sync\n");
+    return -1;
+  }
+  if (srslte_ue_dl_init(&ue_dl, cell.nof_prb, 1)) {
+    fprintf(stderr, "Error initiating UE downlink processing module\n");
+    return -1;
+  }
+  if (srslte_ue_dl_set_cell(&ue_dl, cell)) {
     fprintf(stderr, "Error initiating UE downlink processing module\n");
     return -1;
   }
-  if (srslte_ue_mib_init(&ue_mib, cell)) {
+  if (srslte_ue_mib_init(&ue_mib, cell.nof_prb)) {
     fprintf(stderr, "Error initaiting UE MIB decoder\n");
     return -1;
   }
-  
+  if (srslte_ue_mib_set_cell(&ue_mib, cell)) {
+    fprintf(stderr, "Error initaiting UE MIB decoder\n");
+    return -1;
+  }
+
   /* Configure downlink receiver for the SI-RNTI since will be the only one we'll use */
   srslte_ue_dl_set_rnti(&ue_dl, SRSLTE_SIRNTI); 
 
@@ -264,11 +276,15 @@ int main(int argc, char **argv) {
     fprintf(stderr, "Error initiating FFT\n");
     return -1;
   }
-  if (srslte_chest_dl_init(&chest, cell)) {
+  if (srslte_chest_dl_init(&chest, cell.nof_prb)) {
     fprintf(stderr, "Error initiating channel estimator\n");
     return -1;
   }
-  
+  if (srslte_chest_dl_set_cell(&chest, cell)) {
+    fprintf(stderr, "Error initiating channel estimator\n");
+    return -1;
+  }
+
   int sf_re = SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp);
 
   cf_t *sf_symbols = srslte_vec_malloc(sf_re * sizeof(cf_t));

lib/examples/cell_search.c

@@ -188,6 +188,18 @@ int main(int argc, char **argv) {
   sigprocmask(SIG_UNBLOCK, &sigset, NULL);
   signal(SIGINT, sig_int_handler);
 
+  if (srslte_ue_cellsearch_init_multi(&cs, cell_detect_config.max_frames_pss, srslte_rf_recv_wrapper, 1, (void*) &rf)) {
+    fprintf(stderr, "Error initiating UE cell detect\n");
+    exit(-1);
+  }
+
+  if (cell_detect_config.max_frames_pss) {
+    srslte_ue_cellsearch_set_nof_valid_frames(&cs, cell_detect_config.nof_valid_pss_frames);
+  }
+  if (cell_detect_config.init_agc) {
+    srslte_ue_sync_start_agc(&cs.ue_sync, srslte_rf_set_rx_gain_wrapper, cell_detect_config.init_agc);
+  }
+
   for (freq=0;freq<nof_freqs && !go_exit;freq++) {
   
     /* set rf_freq */
@@ -203,18 +215,6 @@ int main(int argc, char **argv) {
     }
       
     bzero(found_cells, 3*sizeof(srslte_ue_cellsearch_result_t));
-      
-    if (srslte_ue_cellsearch_init_multi(&cs, cell_detect_config.max_frames_pss, srslte_rf_recv_wrapper, 1, (void*) &rf)) {
-      fprintf(stderr, "Error initiating UE cell detect\n");
-      exit(-1);
-    }
-    
-    if (cell_detect_config.max_frames_pss) {
-      srslte_ue_cellsearch_set_nof_valid_frames(&cs, cell_detect_config.nof_valid_pss_frames);
-    }
-    if (cell_detect_config.init_agc) {
-      srslte_ue_sync_start_agc(&cs.ue_sync, srslte_rf_set_rx_gain_wrapper, cell_detect_config.init_agc);    
-    }
 
     INFO("Setting sampling frequency %.2f MHz for PSS search\n", SRSLTE_CS_SAMP_FREQ/1000000);
     srslte_rf_set_rx_srate(&rf, SRSLTE_CS_SAMP_FREQ);
@@ -222,7 +222,6 @@ int main(int argc, char **argv) {
     srslte_rf_start_rx_stream(&rf);
     
     n = srslte_ue_cellsearch_scan(&cs, found_cells, NULL); 
-    srslte_ue_cellsearch_free(&cs);
     if (n < 0) {
       fprintf(stderr, "Error searching cell\n");
       exit(-1);
@@ -254,7 +253,7 @@ int main(int argc, char **argv) {
       }
     }    
   }
-  
+
   printf("\n\nFound %d cells\n", n_found_cells);
   for (int i=0;i<n_found_cells;i++) {
     printf("Found CELL %.1f MHz, EARFCN=%d, PHYID=%d, %d PRB, %d ports, PSS power=%.1f dBm\n", 
@@ -268,7 +267,8 @@ int main(int argc, char **argv) {
   }
   
   printf("\nBye\n");
-    
+
+  srslte_ue_cellsearch_free(&cs);
   srslte_rf_close(&rf);
   exit(0);
 }

lib/examples/pdsch_enodeb.c

@@ -292,7 +292,11 @@ void base_init() {
     exit(-1);
   }
   srslte_ofdm_set_normalize(&ifft, true);
-  if (srslte_pbch_init(&pbch, cell)) {
+  if (srslte_pbch_init(&pbch)) {
+    fprintf(stderr, "Error creating PBCH object\n");
+    exit(-1);
+  }
+  if (srslte_pbch_set_cell(&pbch, cell)) {
     fprintf(stderr, "Error creating PBCH object\n");
     exit(-1);
   }
@@ -302,7 +306,11 @@ void base_init() {
     exit(-1);
   }
 
-  if (srslte_pcfich_init(&pcfich, &regs, cell)) {
+  if (srslte_pcfich_init(&pcfich, 1)) {
+    fprintf(stderr, "Error creating PBCH object\n");
+    exit(-1);
+  }
+  if (srslte_pcfich_set_cell(&pcfich, &regs, cell)) {
     fprintf(stderr, "Error creating PBCH object\n");
     exit(-1);
   }
@@ -312,13 +320,20 @@ void base_init() {
     exit(-1);
   }
 
-  if (srslte_pdcch_init_tx(&pdcch, &regs, cell)) {
+  if (srslte_pdcch_init_enb(&pdcch, cell.nof_prb)) {
+    fprintf(stderr, "Error creating PDCCH object\n");
+    exit(-1);
+  }
+  if (srslte_pdcch_set_cell(&pdcch, &regs, cell)) {
     fprintf(stderr, "Error creating PDCCH object\n");
     exit(-1);
   }
 
-  bzero(&pdsch, sizeof(srslte_pdsch_t));
-  if (srslte_pdsch_init_tx(&pdsch, cell)) {
+  if (srslte_pdsch_init_enb(&pdsch, cell.nof_prb)) {
+    fprintf(stderr, "Error creating PDSCH object\n");
+    exit(-1);
+  }
+  if (srslte_pdsch_set_cell(&pdsch, cell)) {
     fprintf(stderr, "Error creating PDSCH object\n");
     exit(-1);
   }
@@ -660,7 +675,11 @@ int main(int argc, char **argv) {
   srslte_sss_generate(sss_signal0, sss_signal5, cell.id);
   
   /* Generate CRS signals */
-  if (srslte_chest_dl_init(&est, cell)) {
+  if (srslte_chest_dl_init(&est, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    exit(-1);
+  }
+  if (srslte_chest_dl_set_cell(&est, cell)) {
     fprintf(stderr, "Error initializing equalizer\n");
     exit(-1);
   }

lib/examples/pdsch_ue.c

@@ -475,23 +475,42 @@ int main(int argc, char **argv) {
              //ue_sync.decimate = prog_args.decimate;
           }
       }
-    if (srslte_ue_sync_init_multi_decim(&ue_sync, cell, srslte_rf_recv_wrapper, prog_args.rf_nof_rx_ant, (void*) &rf,decimate)) {
+    if (srslte_ue_sync_init_multi_decim(&ue_sync,
+                                        cell.nof_prb,
+                                        cell.id==1000,
+                                        srslte_rf_recv_wrapper,
+                                        prog_args.rf_nof_rx_ant,
+                                        (void*) &rf,decimate))
+    {
       fprintf(stderr, "Error initiating ue_sync\n");
       exit(-1); 
     }
+    if (srslte_ue_sync_set_cell(&ue_sync, cell))
+    {
+      fprintf(stderr, "Error initiating ue_sync\n");
+      exit(-1);
+    }
 #endif
   }
 
-  if (srslte_ue_mib_init(&ue_mib, cell)) {
+  if (srslte_ue_mib_init(&ue_mib, cell.nof_prb)) {
+    fprintf(stderr, "Error initaiting UE MIB decoder\n");
+    exit(-1);
+  }
+  if (srslte_ue_mib_set_cell(&ue_mib, cell)) {
     fprintf(stderr, "Error initaiting UE MIB decoder\n");
     exit(-1);
-  }    
+  }
 
-  if (srslte_ue_dl_init(&ue_dl, cell, prog_args.rf_nof_rx_ant)) {  // This is the User RNTI
+  if (srslte_ue_dl_init(&ue_dl, cell.nof_prb, prog_args.rf_nof_rx_ant)) {
     fprintf(stderr, "Error initiating UE downlink processing module\n");
     exit(-1);
   }
-  
+  if (srslte_ue_dl_set_cell(&ue_dl, cell)) {
+    fprintf(stderr, "Error initiating UE downlink processing module\n");
+    exit(-1);
+  }
+
   for (int i=0;i<prog_args.rf_nof_rx_ant;i++) {
     sf_buffer[i] = srslte_vec_malloc(3*sizeof(cf_t)*SRSLTE_SF_LEN_PRB(cell.nof_prb));
   }
@@ -566,6 +585,10 @@ int main(int argc, char **argv) {
       /* If a new line is detected set verbose level to Debug */
       if (fgets(input, sizeof(input), stdin)) {
         srslte_verbose = SRSLTE_VERBOSE_DEBUG;
+        ue_dl.pkt_errors = 0;
+        ue_dl.pkts_total = 0;
+        ue_dl.nof_detected = 0;
+        nof_trials = 0;
       }
     }
 
@@ -760,10 +783,12 @@ int main(int argc, char **argv) {
         if (sfn == 1024) {
           sfn = 0; 
           PRINT_LINE_ADVANCE_CURSOR();
+          /*
           ue_dl.pkt_errors = 0; 
           ue_dl.pkts_total = 0; 
           ue_dl.nof_detected = 0;           
-          nof_trials = 0; 
+          nof_trials = 0;
+          */
         } 
       }
       

lib/examples/usrp_capture_sync.c

@@ -165,11 +165,15 @@ int main(int argc, char **argv) {
   cell.nof_prb = nof_prb; 
   cell.nof_ports = 1; 
   
-  if (srslte_ue_sync_init_multi(&ue_sync, cell, srslte_rf_recv_wrapper, nof_rx_antennas, (void*) &rf)) {
+  if (srslte_ue_sync_init_multi(&ue_sync, cell.nof_prb, cell.id==1000, srslte_rf_recv_wrapper, nof_rx_antennas, (void*) &rf)) {
     fprintf(stderr, "Error initiating ue_sync\n");
     exit(-1); 
   }
- 
+  if (srslte_ue_sync_set_cell(&ue_sync, cell)) {
+    fprintf(stderr, "Error initiating ue_sync\n");
+    exit(-1);
+  }
+
   uint32_t subframe_count = 0;
   bool start_capture = false; 
   bool stop_capture = false; 

lib/include/srslte/common/bcd_helpers.h

@@ -30,6 +30,7 @@
 #include <ctype.h>
 #include <stdint.h>
 #include <string>
+#include <srslte/asn1/liblte_rrc.h>
 
 namespace srslte {
 
@@ -112,6 +113,12 @@ inline bool mnc_to_string(uint16_t mnc, std::string *str)
   *str += (mnc & 0x000F) + '0';
   return true;
 }
+inline std::string plmn_id_to_c_str(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id) {
+  std::string mcc_str, mnc_str;
+  mnc_to_string(plmn_id.mnc, &mnc_str);
+  mcc_to_string(plmn_id.mcc, &mcc_str);
+  return mcc_str + mnc_str;
+}
 
 } // namespace srslte
 

lib/include/srslte/interfaces/ue_interfaces.h

@@ -102,6 +102,15 @@ public:
   virtual void      write_pdu(uint32_t lcid, srslte::byte_buffer_t *pdu) = 0;
   virtual uint32_t  get_ul_count() = 0;
   virtual bool      get_s_tmsi(LIBLTE_RRC_S_TMSI_STRUCT *s_tmsi) = 0;
+  virtual void      plmn_found(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, uint16_t tracking_area_code) = 0;
+};
+
+// NAS interface for UE
+class nas_interface_ue
+{
+public:
+  virtual void      attach_request() = 0;
+  virtual void      deattach_request() = 0;
 };
 
 // RRC interface for MAC
@@ -123,6 +132,7 @@ class rrc_interface_phy
 public:
   virtual void in_sync() = 0;
   virtual void out_of_sync() = 0;
+  virtual void cell_found(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp) = 0;
 };
 
 // RRC interface for NAS
@@ -133,18 +143,11 @@ public:
   virtual uint16_t get_mcc() = 0;
   virtual uint16_t get_mnc() = 0;
   virtual void enable_capabilities() = 0;
+  virtual void plmn_search() = 0;
+  virtual void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id) = 0;
   virtual std::string get_rb_name(uint32_t lcid) = 0;
 };
 
-// RRC interface for GW
-class rrc_interface_gw
-{
-public:
-  virtual bool rrc_connected() = 0;
-  virtual void rrc_connect() = 0; 
-  virtual bool have_drb() = 0;
-};
-
 // RRC interface for PDCP
 class rrc_interface_pdcp
 {
@@ -423,8 +426,8 @@ typedef struct {
   int worker_cpu_mask;
   int sync_cpu_affinity;
   
-  uint32_t nof_rx_ant;   
-  std::string equalizer_mode; 
+  uint32_t nof_rx_ant;
+  std::string equalizer_mode;
   int cqi_max; 
   int cqi_fixed; 
   float snr_ema_coeff; 
@@ -444,9 +447,8 @@ class phy_interface_mac_common
 {
 public:
   /* Start synchronization with strongest cell in the current carrier frequency */
-  virtual void sync_start() = 0;
-  virtual void sync_stop() = 0;
-
+  virtual bool sync_status() = 0;
+  
   /* Sets a C-RNTI allowing the PHY to pregenerate signals if necessary */
   virtual void set_crnti(uint16_t rnti) = 0;
 
@@ -513,9 +515,15 @@ public:
   virtual void set_config_common(phy_cfg_common_t *common) = 0; 
   virtual void set_config_tdd(LIBLTE_RRC_TDD_CONFIG_STRUCT *tdd) = 0; 
   virtual void set_config_64qam_en(bool enable) = 0;
-  
+
+  /* Cell search and selection procedures */
+  virtual void cell_search_start() = 0;
+  virtual void cell_search_next() = 0;
+  virtual bool cell_select(uint32_t earfcn, srslte_cell_t cell) = 0;
+  virtual bool sync_stop() = 0;
+
   /* Is the PHY downlink synchronized? */
-  virtual bool status_is_sync() = 0;
+  virtual bool sync_status() = 0;
 
   /* Configure UL using parameters written with set_param() */
   virtual void configure_ul_params(bool pregen_disabled = false) = 0;

lib/include/srslte/phy/ch_estimation/chest_dl.h

@@ -92,9 +92,12 @@ typedef struct {
 
 
 SRSLTE_API int srslte_chest_dl_init(srslte_chest_dl_t *q, 
-                                    srslte_cell_t cell);
+                                    uint32_t max_prb);
 
-SRSLTE_API void srslte_chest_dl_free(srslte_chest_dl_t *q); 
+SRSLTE_API void srslte_chest_dl_free(srslte_chest_dl_t *q);
+
+SRSLTE_API int srslte_chest_dl_set_cell(srslte_chest_dl_t *q,
+                                        srslte_cell_t cell);
 
 SRSLTE_API void srslte_chest_dl_set_smooth_filter(srslte_chest_dl_t *q, 
                                                   float *filter, 

lib/include/srslte/phy/ch_estimation/chest_ul.h

@@ -77,9 +77,13 @@ typedef struct {
 
 
 SRSLTE_API int srslte_chest_ul_init(srslte_chest_ul_t *q, 
-                                    srslte_cell_t cell);
+                                    uint32_t max_prb);
+
+SRSLTE_API void srslte_chest_ul_free(srslte_chest_ul_t *q);
+
+SRSLTE_API int srslte_chest_ul_set_cell(srslte_chest_ul_t *q,
+                                        srslte_cell_t cell);
 
-SRSLTE_API void srslte_chest_ul_free(srslte_chest_ul_t *q); 
 
 SRSLTE_API void srslte_chest_ul_set_cfg(srslte_chest_ul_t *q, 
                                         srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,

lib/include/srslte/phy/ch_estimation/refsignal_dl.h

@@ -53,7 +53,10 @@ typedef struct SRSLTE_API {
 
 
 SRSLTE_API int srslte_refsignal_cs_init(srslte_refsignal_cs_t *q, 
-                                        srslte_cell_t cell);
+                                        uint32_t max_prb);
+
+SRSLTE_API int srslte_refsignal_cs_set_cell(srslte_refsignal_cs_t * q,
+                                           srslte_cell_t cell);
 
 SRSLTE_API void srslte_refsignal_cs_free(srslte_refsignal_cs_t *q);
 

lib/include/srslte/phy/ch_estimation/refsignal_ul.h

@@ -94,7 +94,10 @@ typedef struct {
 } srslte_refsignal_srs_pregen_t;
 
 SRSLTE_API int srslte_refsignal_ul_init(srslte_refsignal_ul_t *q, 
-                                        srslte_cell_t cell);
+                                        uint32_t max_prb);
+
+SRSLTE_API int srslte_refsignal_ul_set_cell(srslte_refsignal_ul_t *q,
+                                            srslte_cell_t cell);
 
 SRSLTE_API void srslte_refsignal_ul_free(srslte_refsignal_ul_t *q);
 
@@ -115,9 +118,13 @@ SRSLTE_API uint32_t srslte_refsignal_dmrs_pucch_symbol(uint32_t m,
 
 SRSLTE_API bool srslte_refsignal_dmrs_pusch_cfg_isvalid(srslte_refsignal_ul_t *q, 
                                                         srslte_refsignal_dmrs_pusch_cfg_t *cfg, 
-                                                        uint32_t nof_prb); 
+                                                        uint32_t nof_prb);
+
+SRSLTE_API int srslte_refsignal_dmrs_pusch_pregen_init(srslte_refsignal_ul_t *q,
+                                                       srslte_refsignal_ul_dmrs_pregen_t *pregen,
+                                                       uint32_t max_prb);
 
-SRSLTE_API int srslte_refsignal_dmrs_pusch_pregen(srslte_refsignal_ul_t *q, 
+SRSLTE_API int srslte_refsignal_dmrs_pusch_pregen(srslte_refsignal_ul_t *q,
                                                   srslte_refsignal_ul_dmrs_pregen_t *pregen);
 
 SRSLTE_API void srslte_refsignal_dmrs_pusch_pregen_free(srslte_refsignal_ul_t *q, 

lib/include/srslte/phy/common/sequence.h

@@ -44,7 +44,8 @@ typedef struct SRSLTE_API {
   uint8_t *c_bytes;
   float *c_float;
   short *c_short;
-  uint32_t len;
+  uint32_t cur_len;
+  uint32_t max_len;
 } srslte_sequence_t;
 
 SRSLTE_API int srslte_sequence_init(srslte_sequence_t *q, uint32_t len);
@@ -55,8 +56,9 @@ SRSLTE_API int srslte_sequence_LTE_pr(srslte_sequence_t *q,
                                       uint32_t len, 
                                       uint32_t seed);
 
-SRSLTE_API void srslte_sequence_set_LTE_pr(srslte_sequence_t *q, 
-                                           uint32_t seed); 
+SRSLTE_API int srslte_sequence_set_LTE_pr(srslte_sequence_t *q,
+                                           uint32_t len,
+                                           uint32_t seed);
 
 SRSLTE_API int srslte_sequence_pbch(srslte_sequence_t *seq, 
                                     srslte_cp_t cp, 

lib/include/srslte/phy/dft/dft.h

@@ -58,6 +58,7 @@ typedef enum {
 }srslte_dft_dir_t;
 
 typedef struct SRSLTE_API {
+  int init_size;      // DFT length used in the first initialization
   int size;           // DFT length
   void *in;           // Input buffer
   void *out;          // Output buffer
@@ -80,7 +81,7 @@ SRSLTE_API int srslte_dft_plan(srslte_dft_plan_t *plan,
                                srslte_dft_dir_t dir,                         
                                srslte_dft_mode_t type);
 
-SRSLTE_API int srslte_dft_plan_c(srslte_dft_plan_t *plan, 
+SRSLTE_API int srslte_dft_plan_c(srslte_dft_plan_t *plan,
                                  int dft_points, 
                                  srslte_dft_dir_t dir);
 
@@ -88,6 +89,16 @@ SRSLTE_API int srslte_dft_plan_r(srslte_dft_plan_t *plan,
                                  int dft_points, 
                                  srslte_dft_dir_t dir);
 
+SRSLTE_API int srslte_dft_replan(srslte_dft_plan_t *plan,
+                                 const int new_dft_points);
+
+SRSLTE_API int srslte_dft_replan_c(srslte_dft_plan_t *plan,
+                                   int new_dft_points);
+
+SRSLTE_API int srslte_dft_replan_r(srslte_dft_plan_t *plan,
+                                   int new_dft_points);
+
+
 SRSLTE_API void srslte_dft_plan_free(srslte_dft_plan_t *plan);
 
 /* Set options */

lib/include/srslte/phy/dft/dft_precoding.h

@@ -45,12 +45,18 @@ typedef struct SRSLTE_API {
 
   uint32_t max_prb;  
   srslte_dft_plan_t dft_plan[SRSLTE_MAX_PRB+1];
-  srslte_dft_plan_t idft_plan[SRSLTE_MAX_PRB+1];
-    
+
 }srslte_dft_precoding_t;
 
-SRSLTE_API int srslte_dft_precoding_init(srslte_dft_precoding_t *q, 
-                                         uint32_t max_prb);
+SRSLTE_API int srslte_dft_precoding_init(srslte_dft_precoding_t *q,
+                                         uint32_t max_prb,
+                                         bool is_tx);
+
+SRSLTE_API int srslte_dft_precoding_init_tx(srslte_dft_precoding_t *q,
+                                            uint32_t max_prb);
+
+SRSLTE_API int srslte_dft_precoding_init_rx(srslte_dft_precoding_t *q,
+                                            uint32_t max_prb);
 
 SRSLTE_API void srslte_dft_precoding_free(srslte_dft_precoding_t *q);
 
@@ -62,10 +68,4 @@ SRSLTE_API int srslte_dft_precoding(srslte_dft_precoding_t *q,
                                     uint32_t nof_prb, 
                                     uint32_t nof_symbols);
 
-SRSLTE_API int srslte_dft_predecoding(srslte_dft_precoding_t *q, 
-                                      cf_t *input, 
-                                      cf_t *output, 
-                                      uint32_t nof_prb, 
-                                      uint32_t nof_symbols);
-
 #endif

lib/include/srslte/phy/dft/ofdm.h

@@ -47,6 +47,7 @@
 /* This is common for both directions */
 typedef struct SRSLTE_API{
   srslte_dft_plan_t fft_plan;
+  uint32_t max_prb;
   uint32_t nof_symbols;
   uint32_t symbol_sz;
   uint32_t nof_guards;
@@ -56,18 +57,27 @@ typedef struct SRSLTE_API{
   cf_t *tmp; // for removing zero padding
   
   bool freq_shift;
+  float freq_shift_f;
   cf_t *shift_buffer; 
 }srslte_ofdm_t;
 
 SRSLTE_API int srslte_ofdm_init_(srslte_ofdm_t *q, 
                                  srslte_cp_t cp, 
                                  int symbol_sz, 
-                                 int nof_prb, 
+                                 int max_prb,
                                  srslte_dft_dir_t dir); 
 
 SRSLTE_API int srslte_ofdm_rx_init(srslte_ofdm_t *q, 
                                srslte_cp_t cp_type, 
-                               uint32_t nof_prb);
+                               uint32_t max_prb);
+
+SRSLTE_API int srslte_ofdm_tx_set_prb(srslte_ofdm_t *q,
+                                      srslte_cp_t cp,
+                                      uint32_t nof_prb);
+
+SRSLTE_API int srslte_ofdm_rx_set_prb(srslte_ofdm_t *q,
+                                      srslte_cp_t cp,
+                                      uint32_t nof_prb);
 
 SRSLTE_API void srslte_ofdm_rx_free(srslte_ofdm_t *q);
 

lib/include/srslte/phy/enb/enb_dl.h

@@ -108,11 +108,14 @@ typedef struct {
 
 /* This function shall be called just after the initial synchronization */
 SRSLTE_API int srslte_enb_dl_init(srslte_enb_dl_t *q, 
-                                  srslte_cell_t cell);
+                                  uint32_t max_prb);
 
 SRSLTE_API void srslte_enb_dl_free(srslte_enb_dl_t *q);
 
-SRSLTE_API void srslte_enb_dl_set_cfi(srslte_enb_dl_t *q, 
+SRSLTE_API int srslte_enb_dl_set_cell(srslte_enb_dl_t *q,
+                                      srslte_cell_t cell);
+
+SRSLTE_API void srslte_enb_dl_set_cfi(srslte_enb_dl_t *q,
                                       uint32_t cfi);
 
 SRSLTE_API void srslte_enb_dl_set_amp(srslte_enb_dl_t *q, 
@@ -154,16 +157,18 @@ SRSLTE_API int srslte_enb_dl_put_pdsch(srslte_enb_dl_t *q,
                                        srslte_ra_dl_grant_t *grant, 
                                        srslte_softbuffer_tx_t *softbuffer[SRSLTE_MAX_CODEWORDS],
                                        uint16_t rnti,
-                                       uint32_t rv_idx, 
+                                       int rv_idx[SRSLTE_MAX_CODEWORDS],
                                        uint32_t sf_idx, 
-                                       uint8_t *data[SRSLTE_MAX_CODEWORDS]);
+                                       uint8_t *data[SRSLTE_MAX_CODEWORDS],
+                                       srslte_mimo_type_t mimo_type,
+                                       uint32_t pmi);
 
 SRSLTE_API int srslte_enb_dl_put_pdcch_dl(srslte_enb_dl_t *q, 
                                           srslte_ra_dl_dci_t *grant, 
                                           srslte_dci_format_t format, 
                                           srslte_dci_location_t location,
                                           uint16_t rnti, 
-                                          uint32_t sf_idx); 
+                                          uint32_t sf_idx);
 
 SRSLTE_API int srslte_enb_dl_put_pdcch_ul(srslte_enb_dl_t *q, 
                                           srslte_ra_ul_dci_t *grant, 

lib/include/srslte/phy/enb/enb_ul.h

@@ -100,15 +100,18 @@ typedef struct {
 } srslte_enb_ul_pusch_t; 
 
 /* This function shall be called just after the initial synchronization */
-SRSLTE_API int srslte_enb_ul_init(srslte_enb_ul_t *q, 
-                                  srslte_cell_t cell, 
-                                  srslte_prach_cfg_t* prach_cfg, 
-                                  srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,
-                                  srslte_pusch_hopping_cfg_t *hopping_cfg,
-                                  srslte_pucch_cfg_t *pucch_cfg);
+SRSLTE_API int srslte_enb_ul_init(srslte_enb_ul_t *q,
+                                  uint32_t max_prb);
 
 SRSLTE_API void srslte_enb_ul_free(srslte_enb_ul_t *q);
 
+SRSLTE_API int srslte_enb_ul_set_cell(srslte_enb_ul_t *q,
+                                      srslte_cell_t cell,
+                                      srslte_prach_cfg_t* prach_cfg,
+                                      srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,
+                                      srslte_pusch_hopping_cfg_t *hopping_cfg,
+                                      srslte_pucch_cfg_t *pucch_cfg);
+
 SRSLTE_API int srslte_enb_ul_add_rnti(srslte_enb_ul_t *q, 
                                       uint16_t rnti); 
 

lib/include/srslte/phy/phch/pbch.h

@@ -53,6 +53,8 @@
 #define SRSLTE_BCH_PAYLOADCRC_LEN  (SRSLTE_BCH_PAYLOAD_LEN+16)
 #define SRSLTE_BCH_ENCODED_LEN     3*(SRSLTE_BCH_PAYLOADCRC_LEN)
 
+#define SRSLTE_PBCH_MAX_RE 256 // make it avx2-aligned
+
 /* PBCH object */
 typedef struct SRSLTE_API {
   srslte_cell_t cell;
@@ -83,12 +85,14 @@ typedef struct SRSLTE_API {
   
 } srslte_pbch_t;
 
-SRSLTE_API int srslte_pbch_init(srslte_pbch_t *q,
-                         srslte_cell_t cell);
+SRSLTE_API int srslte_pbch_init(srslte_pbch_t *q);
 
 SRSLTE_API void srslte_pbch_free(srslte_pbch_t *q);
 
-SRSLTE_API int srslte_pbch_decode(srslte_pbch_t *q, 
+SRSLTE_API int srslte_pbch_set_cell(srslte_pbch_t *q,
+                                    srslte_cell_t cell);
+
+SRSLTE_API int srslte_pbch_decode(srslte_pbch_t *q,
                            cf_t *slot1_symbols, 
                            cf_t *ce_slot1[SRSLTE_MAX_PORTS], 
                            float noise_estimate, 

lib/include/srslte/phy/phch/pcfich.h

@@ -78,14 +78,12 @@ typedef struct SRSLTE_API {
   
 } srslte_pcfich_t;
 
-SRSLTE_API int srslte_pcfich_init(srslte_pcfich_t *q, 
-                           srslte_regs_t *regs, 
-                           srslte_cell_t cell);
-
-SRSLTE_API int srslte_pcfich_init_multi(srslte_pcfich_t *q, 
-                                        srslte_regs_t *regs, 
-                                        srslte_cell_t cell, 
-                                        uint32_t nof_rx_antennas);
+SRSLTE_API int srslte_pcfich_init(srslte_pcfich_t *q,
+                                  uint32_t nof_rx_antennas);
+
+SRSLTE_API int srslte_pcfich_set_cell(srslte_pcfich_t *q,
+                                      srslte_regs_t *regs,
+                                      srslte_cell_t cell);
 
 SRSLTE_API void srslte_pcfich_free(srslte_pcfich_t *q);
 

lib/include/srslte/phy/phch/pdcch.h

@@ -64,6 +64,7 @@ typedef struct SRSLTE_API {
   uint32_t nof_cce;
   uint32_t max_bits;
   uint32_t nof_rx_antennas;
+  bool     is_ue;
   
   srslte_regs_t *regs;
 
@@ -84,29 +85,16 @@ typedef struct SRSLTE_API {
   
 } srslte_pdcch_t;
 
-SRSLTE_API int srslte_pdcch_init(srslte_pdcch_t *q, 
-                                 srslte_regs_t *regs, 
-                                 srslte_cell_t cell);
-
-SRSLTE_API int srslte_pdcch_init_tx(srslte_pdcch_t *q,
-                         srslte_regs_t *regs,
-                         srslte_cell_t cell);
-
-SRSLTE_API int srslte_pdcch_init_rx(srslte_pdcch_t *q,
-                         srslte_regs_t *regs,
-                         srslte_cell_t cell,
-                         uint32_t nof_rx_antennas);
-
-SRSLTE_API int srslte_pdcch_init_multi(srslte_pdcch_t *q, 
-                                       srslte_regs_t *regs, 
-                                       srslte_cell_t cell, 
-                                       uint32_t nof_rx_antennas);
-
-SRSLTE_API int srslte_pdcch_init_txrx(srslte_pdcch_t *q,
-                                      srslte_regs_t *regs,
-                                      srslte_cell_t cell,
-                                      uint32_t nof_rx_antennas,
-                                      bool isReceiver);
+SRSLTE_API int srslte_pdcch_init_ue(srslte_pdcch_t *q,
+                                    uint32_t max_prb,
+                                    uint32_t nof_rx_antennas);
+
+SRSLTE_API int srslte_pdcch_init_enb(srslte_pdcch_t *q,
+                                     uint32_t max_prb);
+
+SRSLTE_API int srslte_pdcch_set_cell(srslte_pdcch_t *q,
+                                     srslte_regs_t *regs,
+                                     srslte_cell_t cell);
 
 SRSLTE_API void srslte_pdcch_free(srslte_pdcch_t *q);
 

lib/include/srslte/phy/phch/pdsch.h

@@ -49,6 +49,7 @@
 
 typedef struct {
   srslte_sequence_t seq[SRSLTE_MAX_CODEWORDS][SRSLTE_NSUBFRAMES_X_FRAME];
+  uint32_t cell_id;
   bool sequence_generated;
 } srslte_pdsch_user_t;
 
@@ -59,7 +60,10 @@ typedef struct SRSLTE_API {
   uint32_t nof_rx_antennas;
   
   uint32_t max_re;
-  
+
+  uint16_t ue_rnti;
+  bool is_ue;
+
   /* buffers */
   // void buffers are shared for tx and rx
   cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS]; /* Channel estimation (Rx only) */
@@ -73,21 +77,27 @@ typedef struct SRSLTE_API {
   
   // This is to generate the scrambling seq for multiple CRNTIs
   srslte_pdsch_user_t **users;
-  
+
+  srslte_sequence_t tmp_seq;
+
   srslte_sch_t dl_sch;
 
 } srslte_pdsch_t;
 
-SRSLTE_API int srslte_pdsch_init_tx(srslte_pdsch_t *q,
-                                    srslte_cell_t cell);
 
-SRSLTE_API int srslte_pdsch_init_rx(srslte_pdsch_t *q,
-                                    srslte_cell_t cell,
-                                    uint32_t nof_antennas);
+SRSLTE_API int srslte_pdsch_init_ue(srslte_pdsch_t *q,
+                                    uint32_t max_prb,
+                                    uint32_t nof_rx_antennas);
+
+SRSLTE_API int srslte_pdsch_init_enb(srslte_pdsch_t *q,
+                                     uint32_t max_prb);
 
 SRSLTE_API void srslte_pdsch_free(srslte_pdsch_t *q);
 
-SRSLTE_API int srslte_pdsch_set_rnti(srslte_pdsch_t *q, 
+SRSLTE_API int srslte_pdsch_set_cell(srslte_pdsch_t *q,
+                                     srslte_cell_t cell);
+
+SRSLTE_API int srslte_pdsch_set_rnti(srslte_pdsch_t *q,
                                      uint16_t rnti);
 
 SRSLTE_API void srslte_pdsch_free_rnti(srslte_pdsch_t *q, 

lib/include/srslte/phy/phch/phich.h

@@ -85,18 +85,16 @@ typedef struct SRSLTE_API {
   
 } srslte_phich_t;
 
-SRSLTE_API int srslte_phich_init(srslte_phich_t *q, 
-                                 srslte_regs_t *regs, 
-                                 srslte_cell_t cell);
-
-SRSLTE_API int srslte_phich_init_multi(srslte_phich_t *q, 
-                                       srslte_regs_t *regs, 
-                                       srslte_cell_t cell, 
-                                       uint32_t nof_rx_antennas);
+SRSLTE_API int srslte_phich_init(srslte_phich_t *q,
+                                 uint32_t nof_rx_antennas);
 
 SRSLTE_API void srslte_phich_free(srslte_phich_t *q);
 
-SRSLTE_API void srslte_phich_calc(srslte_phich_t *q, 
+SRSLTE_API int srslte_phich_set_cell(srslte_phich_t *q,
+                                     srslte_regs_t *regs,
+                                     srslte_cell_t cell);
+
+SRSLTE_API void srslte_phich_calc(srslte_phich_t *q,
                                   uint32_t n_prb_lowest, 
                                   uint32_t n_dmrs, 
                                   uint32_t *ngroup, 

lib/include/srslte/phy/phch/prach.h

@@ -44,6 +44,8 @@
 #include "srslte/phy/common/phy_common.h"
 
 
+#define SRSLTE_PRACH_MAX_LEN  (2*24576+21024) // Maximum Tcp + Tseq
+
 /** Generation and detection of RACH signals for uplink.
  *  Currently only supports preamble formats 0-3.
  *  Does not currently support high speed flag.
@@ -60,6 +62,8 @@ typedef struct SRSLTE_API {
   uint32_t N_ifft_ul;       // IFFT size for uplink
   uint32_t N_ifft_prach;    // IFFT size for PRACH generation
 
+  uint32_t max_N_ifft_ul;
+
   // Working parameters
   uint32_t N_zc;  // PRACH sequence length
   uint32_t N_cs;  // Cyclic shift size
@@ -82,12 +86,12 @@ typedef struct SRSLTE_API {
   float *corr;
 
   // PRACH IFFT
-  srslte_dft_plan_t *fft;
-  srslte_dft_plan_t *ifft;
+  srslte_dft_plan_t fft;
+  srslte_dft_plan_t ifft;
 
   // ZC-sequence FFT and IFFT
-  srslte_dft_plan_t *zc_fft;
-  srslte_dft_plan_t *zc_ifft;
+  srslte_dft_plan_t zc_fft;
+  srslte_dft_plan_t zc_ifft;
   
   cf_t *signal_fft; 
   float detect_factor; 
@@ -129,11 +133,14 @@ SRSLTE_API void srslte_prach_sf_config(uint32_t config_idx,
                                        srslte_prach_sf_config_t *sf_config);
 
 SRSLTE_API int srslte_prach_init(srslte_prach_t *p,
-                                 uint32_t N_ifft_ul,
-                                 uint32_t config_idx,
-                                 uint32_t root_seq_index,
-                                 bool high_speed_flag,
-                                 uint32_t zero_corr_zone_config);
+                                 uint32_t max_N_ifft_ul);
+
+SRSLTE_API int srslte_prach_set_cell(srslte_prach_t *p,
+                                     uint32_t N_ifft_ul,
+                                     uint32_t config_idx,
+                                     uint32_t root_seq_index,
+                                     bool high_speed_flag,
+                                     uint32_t zero_corr_zone_config);
 
 SRSLTE_API int srslte_prach_init_cfg(srslte_prach_t* p, 
                                      srslte_prach_cfg_t* cfg, 

lib/include/srslte/phy/phch/pucch.h

@@ -45,7 +45,7 @@
 #define SRSLTE_PUCCH_N_SEQ       12 
 #define SRSLTE_PUCCH2_NOF_BITS   SRSLTE_UCI_CQI_CODED_PUCCH_B
 #define SRSLTE_PUCCH_MAX_BITS    SRSLTE_CQI_MAX_BITS
-#define SRSLTE_PUCCH_MAX_SYMBOLS 120
+#define SRSLTE_PUCCH_MAX_SYMBOLS 128
 
 typedef enum SRSLTE_API {
   SRSLTE_PUCCH_FORMAT_1 = 0, 
@@ -115,12 +115,14 @@ typedef struct SRSLTE_API {
 }srslte_pucch_t;
 
 
-SRSLTE_API int srslte_pucch_init(srslte_pucch_t *q, 
-                                 srslte_cell_t cell);
+SRSLTE_API int srslte_pucch_init(srslte_pucch_t *q);
 
 SRSLTE_API void srslte_pucch_free(srslte_pucch_t *q);
 
-SRSLTE_API bool srslte_pucch_set_cfg(srslte_pucch_t* q, 
+SRSLTE_API int srslte_pucch_set_cell(srslte_pucch_t *q,
+                                     srslte_cell_t cell);
+
+SRSLTE_API bool srslte_pucch_set_cfg(srslte_pucch_t* q,
                                      srslte_pucch_cfg_t* cfg, 
                                      bool group_hopping_en); 
 

lib/include/srslte/phy/phch/pusch.h

@@ -62,13 +62,16 @@ typedef struct {
 
 typedef struct {
   srslte_sequence_t seq[SRSLTE_NSUBFRAMES_X_FRAME];
-  bool sequences_generated;
-} srslte_pusch_user_t; 
+  uint32_t cell_id;
+  bool sequence_generated;
+} srslte_pusch_user_t;
 
 /* PUSCH object */
 typedef struct SRSLTE_API {
   srslte_cell_t cell;
 
+  bool is_ue;
+  uint16_t ue_rnti;
   uint32_t max_re;
 
   srslte_dft_precoding_t dft_precoding;  
@@ -96,12 +99,18 @@ typedef struct SRSLTE_API {
 }srslte_pusch_t;
 
 
-SRSLTE_API int srslte_pusch_init(srslte_pusch_t *q, 
-                                 srslte_cell_t cell);
+SRSLTE_API int srslte_pusch_init_ue(srslte_pusch_t *q,
+                                    uint32_t max_prb);
+
+SRSLTE_API int srslte_pusch_init_enb(srslte_pusch_t *q,
+                                    uint32_t max_prb);
 
 SRSLTE_API void srslte_pusch_free(srslte_pusch_t *q);
 
-SRSLTE_API int srslte_pusch_cfg(srslte_pusch_t             *q, 
+SRSLTE_API int srslte_pusch_set_cell(srslte_pusch_t *q,
+                                     srslte_cell_t cell);
+
+SRSLTE_API int srslte_pusch_cfg(srslte_pusch_t             *q,
                                 srslte_pusch_cfg_t         *cfg, 
                                 srslte_ra_ul_grant_t       *grant, 
                                 srslte_uci_cfg_t           *uci_cfg, 
@@ -114,7 +123,7 @@ SRSLTE_API int srslte_pusch_cfg(srslte_pusch_t             *q,
 SRSLTE_API int srslte_pusch_set_rnti(srslte_pusch_t *q, 
                                      uint16_t rnti);
 
-SRSLTE_API void srslte_pusch_clear_rnti(srslte_pusch_t *q, 
+SRSLTE_API void srslte_pusch_free_rnti(srslte_pusch_t *q,
                                        uint16_t rnti);
 
 SRSLTE_API int srslte_pusch_encode(srslte_pusch_t *q, 

lib/include/srslte/phy/resampling/interp.h

@@ -67,7 +67,8 @@ SRSLTE_API void srslte_interp_linear_f(float *input,
 
 typedef struct {
   cf_t *diff_vec; 
-  uint32_t vector_len; 
+  uint32_t vector_len;
+  uint32_t max_vector_len;
 } srslte_interp_linsrslte_vec_t;
 
 SRSLTE_API int srslte_interp_linear_vector_init(srslte_interp_linsrslte_vec_t *q, 
@@ -75,6 +76,9 @@ SRSLTE_API int srslte_interp_linear_vector_init(srslte_interp_linsrslte_vec_t *q
 
 SRSLTE_API void srslte_interp_linear_vector_free(srslte_interp_linsrslte_vec_t *q); 
 
+SRSLTE_API int srslte_interp_linear_vector_resize(srslte_interp_linsrslte_vec_t *q,
+                                                  uint32_t vector_len);
+
 SRSLTE_API void srslte_interp_linear_vector(srslte_interp_linsrslte_vec_t *q, 
                                             cf_t *in0, 
                                             cf_t *in1, 
@@ -107,7 +111,9 @@ typedef struct {
   cf_t *diff_vec2;
   float *ramp;
   uint32_t vector_len; 
-  uint32_t M; 
+  uint32_t M;
+  uint32_t max_vector_len;
+  uint32_t max_M;
 } srslte_interp_lin_t;
 
 SRSLTE_API int srslte_interp_linear_init(srslte_interp_lin_t *q, 
@@ -116,6 +122,10 @@ SRSLTE_API int srslte_interp_linear_init(srslte_interp_lin_t *q,
 
 SRSLTE_API void srslte_interp_linear_free(srslte_interp_lin_t *q);
 
+SRSLTE_API int srslte_interp_linear_resize(srslte_interp_lin_t *q,
+                                           uint32_t vector_len,
+                                           uint32_t M);
+
 SRSLTE_API void srslte_interp_linear_offset(srslte_interp_lin_t *q, 
                                             cf_t *input, 
                                             cf_t *output, 

lib/include/srslte/phy/sync/cfo.h

@@ -49,6 +49,7 @@ typedef struct SRSLTE_API {
   float last_freq;
   float tol;
   int nsamples;
+  int max_samples;
   srslte_cexptab_t tab;
   cf_t *cur_cexp;
 }srslte_cfo_t;
@@ -58,8 +59,8 @@ SRSLTE_API int srslte_cfo_init(srslte_cfo_t *h,
 
 SRSLTE_API void srslte_cfo_free(srslte_cfo_t *h);
 
-SRSLTE_API int srslte_cfo_realloc(srslte_cfo_t *h, 
-                                  uint32_t samples);
+SRSLTE_API int srslte_cfo_resize(srslte_cfo_t *h,
+                                 uint32_t samples);
 
 SRSLTE_API void srslte_cfo_set_tol(srslte_cfo_t *h, 
                                    float tol);

lib/include/srslte/phy/sync/cp.h

@@ -35,6 +35,7 @@
 typedef struct {
   cf_t *corr;
   uint32_t symbol_sz;
+  uint32_t max_symbol_sz;
 } srslte_cp_synch_t;
 
 SRSLTE_API int srslte_cp_synch_init(srslte_cp_synch_t *q, 
@@ -42,6 +43,9 @@ SRSLTE_API int srslte_cp_synch_init(srslte_cp_synch_t *q,
 
 SRSLTE_API void srslte_cp_synch_free(srslte_cp_synch_t *q);
 
+SRSLTE_API int srslte_cp_synch_resize(srslte_cp_synch_t *q,
+                                      uint32_t symbol_sz);
+
 SRSLTE_API uint32_t srslte_cp_synch(srslte_cp_synch_t *q, 
                                     cf_t *input, 
                                     uint32_t max_offset, 

lib/include/srslte/phy/sync/pss.h

@@ -79,6 +79,10 @@ typedef struct SRSLTE_API {
 
 #endif
   int decimate;
+
+  uint32_t max_frame_size;
+  uint32_t max_fft_size;
+
   uint32_t frame_size;
   uint32_t N_id_2;
   uint32_t fft_size;
@@ -113,6 +117,10 @@ SRSLTE_API int srslte_pss_synch_init_fft_offset_decim(srslte_pss_synch_t *q,
                                                 int cfo_i,
                                                 int decimate);
 
+SRSLTE_API int srslte_pss_synch_resize(srslte_pss_synch_t *q, uint32_t frame_size,
+                                       uint32_t fft_size,
+                                       int offset);
+
 SRSLTE_API int srslte_pss_synch_init(srslte_pss_synch_t *q, 
                                      uint32_t frame_size);
 

lib/include/srslte/phy/sync/sss.h

@@ -70,6 +70,7 @@ typedef struct SRSLTE_API {
   srslte_dft_plan_t dftp_input;
   
   uint32_t fft_size;
+  uint32_t max_fft_size;
 
   float corr_peak_threshold;
   uint32_t symbol_sz;
@@ -89,7 +90,7 @@ typedef struct SRSLTE_API {
 SRSLTE_API int srslte_sss_synch_init(srslte_sss_synch_t *q,
                                      uint32_t fft_size);
 
-SRSLTE_API int srslte_sss_synch_realloc(srslte_sss_synch_t *q, 
+SRSLTE_API int srslte_sss_synch_resize(srslte_sss_synch_t *q,
                                         uint32_t fft_size); 
 
 SRSLTE_API void srslte_sss_synch_free(srslte_sss_synch_t *q);

lib/include/srslte/phy/sync/sync.h

@@ -75,6 +75,8 @@ typedef struct SRSLTE_API {
   uint32_t frame_size;
   uint32_t max_offset;
   bool enable_cfo_corr;
+  bool mean_cfo2_isunset;
+  bool mean_cfo_isunset;
   float mean_cfo;
   float mean_cfo2; 
   int cfo_i;
@@ -85,6 +87,7 @@ typedef struct SRSLTE_API {
   uint32_t cp_len;
   srslte_cfo_t cfocorr;
   srslte_cfo_t cfocorr2;
+  float current_cfo_tol;
   sss_alg_t sss_alg; 
   bool detect_cp;
   bool sss_en;
@@ -97,6 +100,8 @@ typedef struct SRSLTE_API {
   float M_ext_avg; 
   cf_t  *temp;
 
+  uint32_t max_frame_size;
+
 }srslte_sync_t;
 
 typedef enum {
@@ -121,6 +126,11 @@ SRSLTE_API int srslte_sync_init_decim(srslte_sync_t *q,
 
 SRSLTE_API void srslte_sync_free(srslte_sync_t *q);
 
+SRSLTE_API int srslte_sync_resize(srslte_sync_t *q,
+                                  uint32_t frame_size,
+                                  uint32_t max_offset,
+                                  uint32_t fft_size);
+
 SRSLTE_API void srslte_sync_reset(srslte_sync_t *q); 
 
 /* Finds a correlation peak in the input signal around position find_offset */
@@ -138,6 +148,9 @@ SRSLTE_API srslte_cp_t srslte_sync_detect_cp(srslte_sync_t *q,
 SRSLTE_API void srslte_sync_set_threshold(srslte_sync_t *q, 
                                           float threshold);
 
+SRSLTE_API void srslte_sync_set_cfo_tol(srslte_sync_t *q,
+                                        float tol);
+
 /* Gets the subframe idx (0 or 5) */
 SRSLTE_API uint32_t srslte_sync_get_sf_idx(srslte_sync_t *q);
 

lib/include/srslte/phy/ue/ue_dl.h

@@ -119,13 +119,16 @@ typedef struct SRSLTE_API {
 
 /* This function shall be called just after the initial synchronization */
 SRSLTE_API int srslte_ue_dl_init(srslte_ue_dl_t *q,
-                                 srslte_cell_t cell,
+                                 uint32_t max_prb,
                                  uint32_t nof_rx_antennas);
 
 SRSLTE_API void srslte_ue_dl_free(srslte_ue_dl_t *q);
 
+SRSLTE_API int srslte_ue_dl_set_cell(srslte_ue_dl_t *q,
+                                          srslte_cell_t cell);
+
 SRSLTE_API int srslte_ue_dl_decode_fft_estimate(srslte_ue_dl_t *q,
-                                                cf_t *input[SRSLTE_MAX_PORTS], 
+                                                cf_t *input[SRSLTE_MAX_PORTS],
                                                 uint32_t sf_idx, 
                                                 uint32_t *cfi); 
 

lib/include/srslte/phy/ue/ue_mib.h

@@ -79,10 +79,13 @@ typedef struct SRSLTE_API {
 } srslte_ue_mib_t;
 
 SRSLTE_API int srslte_ue_mib_init(srslte_ue_mib_t *q, 
-                                  srslte_cell_t cell);
+                                  uint32_t max_prb);
 
 SRSLTE_API void srslte_ue_mib_free(srslte_ue_mib_t *q);
 
+SRSLTE_API int srslte_ue_mib_set_cell(srslte_ue_mib_t * q,
+                                      srslte_cell_t cell);
+
 SRSLTE_API void srslte_ue_mib_reset(srslte_ue_mib_t * q); 
 
 SRSLTE_API int srslte_ue_mib_decode(srslte_ue_mib_t * q, 
@@ -104,21 +107,17 @@ typedef struct {
   uint32_t nof_rx_antennas;
 } srslte_ue_mib_sync_t;
 
-SRSLTE_API int srslte_ue_mib_sync_init(srslte_ue_mib_sync_t *q, 
-                                       uint32_t cell_id, 
-                                       srslte_cp_t cp,
-                                       int (recv_callback)(void*, void*, uint32_t, srslte_timestamp_t *),   
-                                       void *stream_handler);
-
-SRSLTE_API int srslte_ue_mib_sync_init_multi(srslte_ue_mib_sync_t *q, 
-                                             uint32_t cell_id, 
-                                             srslte_cp_t cp,
-                                             int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t *),   
+SRSLTE_API int srslte_ue_mib_sync_init_multi(srslte_ue_mib_sync_t *q,
+                                             int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t *),
                                              uint32_t nof_rx_antennas,
                                              void *stream_handler);
 
 SRSLTE_API void srslte_ue_mib_sync_free(srslte_ue_mib_sync_t *q);
 
+SRSLTE_API int srslte_ue_mib_sync_set_cell(srslte_ue_mib_sync_t *q,
+                                           uint32_t cell_id,
+                                           srslte_cp_t cp);
+
 SRSLTE_API void srslte_ue_mib_sync_reset(srslte_ue_mib_sync_t * q); 
 
 SRSLTE_API int srslte_ue_mib_sync_decode(srslte_ue_mib_sync_t * q, 

lib/include/srslte/phy/ue/ue_sync.h

@@ -69,6 +69,8 @@ typedef enum SRSLTE_API { SF_FIND, SF_TRACK} srslte_ue_sync_state_t;
 typedef struct SRSLTE_API {
   srslte_sync_t sfind;
   srslte_sync_t strack;
+
+  uint32_t max_prb;
   
   srslte_agc_t agc; 
   bool do_agc; 
@@ -125,22 +127,25 @@ typedef struct SRSLTE_API {
 } srslte_ue_sync_t;
 
 SRSLTE_API int srslte_ue_sync_init(srslte_ue_sync_t *q, 
-                                   srslte_cell_t cell,
+                                   uint32_t max_prb,
+                                   bool search_cell,
                                    int (recv_callback)(void*, void*, uint32_t, srslte_timestamp_t*), 
                                    void *stream_handler);
 
-SRSLTE_API int srslte_ue_sync_init_multi(srslte_ue_sync_t *q, 
-                                         srslte_cell_t cell,
+SRSLTE_API int srslte_ue_sync_init_multi(srslte_ue_sync_t *q,
+                                         uint32_t max_prb,
+                                         bool search_cell,
                                          int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t*), 
                                          uint32_t nof_rx_antennas,
                                          void *stream_handler);
 
-SRSLTE_API int srslte_ue_sync_init_multi_decim(srslte_ue_sync_t *q, 
-                                         srslte_cell_t cell,
-                                         int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t*), 
-                                         uint32_t nof_rx_antennas,
-                                         void *stream_handler,
-                                         int decimate);
+SRSLTE_API int srslte_ue_sync_init_multi_decim(srslte_ue_sync_t *q,
+                                               uint32_t max_prb,
+                                               bool search_cell,
+                                               int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t*),
+                                               uint32_t nof_rx_antennas,
+                                               void *stream_handler,
+                                               int decimate);
 
 SRSLTE_API int srslte_ue_sync_init_file(srslte_ue_sync_t *q, 
                                         uint32_t nof_prb,
@@ -157,6 +162,9 @@ SRSLTE_API int srslte_ue_sync_init_file_multi(srslte_ue_sync_t *q,
 
 SRSLTE_API void srslte_ue_sync_free(srslte_ue_sync_t *q);
 
+SRSLTE_API int srslte_ue_sync_set_cell(srslte_ue_sync_t *q,
+                                       srslte_cell_t cell);
+
 SRSLTE_API int srslte_ue_sync_start_agc(srslte_ue_sync_t *q, 
                                         double (set_gain_callback)(void*, double), 
                                         float init_gain_value); 
@@ -173,6 +181,9 @@ SRSLTE_API int srslte_ue_sync_zerocopy(srslte_ue_sync_t *q,
 SRSLTE_API int srslte_ue_sync_zerocopy_multi(srslte_ue_sync_t *q, 
                                              cf_t *input_buffer[SRSLTE_MAX_PORTS]);
 
+SRSLTE_API void srslte_ue_sync_set_cfo_tol(srslte_ue_sync_t *q,
+                                           float tol);
+
 SRSLTE_API void srslte_ue_sync_set_cfo(srslte_ue_sync_t *q, 
                                        float cfo); 
 

lib/include/srslte/phy/ue/ue_ul.h

@@ -75,7 +75,8 @@ typedef struct SRSLTE_API {
   
   bool normalize_en; 
   bool cfo_en; 
-  
+
+  float current_cfo_tol;
   float current_cfo; 
   srslte_pucch_format_t last_pucch_format;
   
@@ -106,15 +107,21 @@ typedef struct SRSLTE_API {
 
 
 /* This function shall be called just after the initial synchronization */
-SRSLTE_API int srslte_ue_ul_init(srslte_ue_ul_t *q, 
-                                 srslte_cell_t cell);
+SRSLTE_API int srslte_ue_ul_init(srslte_ue_ul_t *q,
+                                 uint32_t max_prb);
 
 SRSLTE_API void srslte_ue_ul_free(srslte_ue_ul_t *q);
 
-SRSLTE_API void srslte_ue_ul_set_cfo(srslte_ue_ul_t *q, 
+SRSLTE_API int srslte_ue_ul_set_cell(srslte_ue_ul_t *q,
+                                     srslte_cell_t cell);
+
+SRSLTE_API void srslte_ue_ul_set_cfo_tol(srslte_ue_ul_t *q,
+                                         float tol);
+
+SRSLTE_API void srslte_ue_ul_set_cfo(srslte_ue_ul_t *q,
                                      float cur_cfo); 
 
-SRSLTE_API void srslte_ue_ul_set_cfo_enable(srslte_ue_ul_t *q, 
+SRSLTE_API void srslte_ue_ul_set_cfo_enable(srslte_ue_ul_t *q,
                                             bool enabled); 
 
 SRSLTE_API void srslte_ue_ul_set_normalization(srslte_ue_ul_t *q, 

lib/include/srslte/phy/utils/convolution.h

@@ -46,6 +46,8 @@ typedef struct SRSLTE_API {
   uint32_t input_len;
   uint32_t filter_len;
   uint32_t output_len;
+  uint32_t max_input_len;
+  uint32_t max_filter_len;
   srslte_dft_plan_t input_plan;
   srslte_dft_plan_t filter_plan;
   srslte_dft_plan_t output_plan;
@@ -58,6 +60,9 @@ SRSLTE_API int srslte_conv_fft_cc_init(srslte_conv_fft_cc_t *q,
                                        uint32_t input_len, 
                                        uint32_t filter_len);
 
+SRSLTE_API int srslte_conv_fft_cc_replan(srslte_conv_fft_cc_t *q,
+                                         uint32_t input_len,
+                                         uint32_t filter_len);
 
 SRSLTE_API void srslte_conv_fft_cc_free(srslte_conv_fft_cc_t *q);
 

lib/include/srslte/radio/radio.h

@@ -98,15 +98,16 @@ namespace srslte {
       void set_tx_rx_gain_offset(float offset); 
       double set_rx_gain_th(float gain);
 
-      void set_tx_freq(float freq);
-      void set_rx_freq(float freq);
+      void set_freq_offset(double freq);
+      void set_tx_freq(double freq);
+      void set_rx_freq(double freq);
 
-      float get_tx_freq();
-      float get_rx_freq();
+      double get_tx_freq();
+      double get_rx_freq();
 
-      void set_master_clock_rate(float rate);
-      void set_tx_srate(float srate);
-      void set_rx_srate(float srate);
+      void set_master_clock_rate(double rate);
+      void set_tx_srate(double srate);
+      void set_rx_srate(double srate);
 
       float get_tx_gain();
       float get_rx_gain();
@@ -156,9 +157,9 @@ namespace srslte {
       
       const static double blade_default_burst_preamble_sec = 0.0;
       const static double blade_default_tx_adv_samples     = 27;
-      const static double blade_default_tx_adv_offset_sec  = 1e-6; 
-      
-      float tx_freq, rx_freq; 
+      const static double blade_default_tx_adv_offset_sec  = 1e-6;
+
+      double tx_freq, rx_freq, freq_offset;
       
       trace<uint32_t> tr_local_time;
       trace<uint32_t> tr_usrp_time;

lib/include/srslte/upper/gw.h

@@ -46,7 +46,7 @@ class gw
 {
 public:
   gw();
-  void init(srsue::pdcp_interface_gw *pdcp_, srsue::rrc_interface_gw *rrc_, srsue::ue_interface *ue_, log *gw_log_, uint32_t lcid_);
+  void init(srsue::pdcp_interface_gw *pdcp_, srsue::ue_interface *ue_, log *gw_log_, uint32_t lcid_);
   void stop();
 
   void get_metrics(gw_metrics_t &m);
@@ -62,7 +62,6 @@ private:
   static const int GW_THREAD_PRIO = 7;
 
   srsue::pdcp_interface_gw  *pdcp;
-  srsue::rrc_interface_gw   *rrc;
   srsue::ue_interface       *ue;
 
   byte_buffer_pool   *pool;
@@ -75,6 +74,8 @@ private:
   bool                if_up;
   uint32_t            lcid;
 
+  uint32_t            current_ip_addr;
+
   long                ul_tput_bytes;
   long                dl_tput_bytes;
   struct timeval      metrics_time[3];

lib/src/phy/ch_estimation/chest_dl.c

@@ -32,6 +32,8 @@
 #include <string.h>
 #include <complex.h>
 #include <math.h>
+#include <srslte/phy/common/phy_common.h>
+#include <srslte/srslte.h>
 
 #include "srslte/config.h"
 
@@ -72,63 +74,56 @@ static void set_default_filter(srslte_chest_dl_t *q, int filter_len) {
  * 
  * This object depends on the srslte_refsignal_t object for creating the LTE CSR signal.  
 */
-
-int srslte_chest_dl_init(srslte_chest_dl_t *q, srslte_cell_t cell) 
+int srslte_chest_dl_init(srslte_chest_dl_t *q, uint32_t max_prb)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
-  if (q                != NULL &&
-      srslte_cell_isvalid(&cell)) 
+  if (q                != NULL)
   {
     bzero(q, sizeof(srslte_chest_dl_t));
     
-    ret = srslte_refsignal_cs_init(&q->csr_signal, cell); 
+    ret = srslte_refsignal_cs_init(&q->csr_signal, max_prb);
     if (ret != SRSLTE_SUCCESS) {
       fprintf(stderr, "Error initializing CSR signal (%d)\n",ret);
       goto clean_exit;
     }
     
-    q->tmp_noise = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(cell.nof_prb));
+    q->tmp_noise = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(max_prb));
     if (!q->tmp_noise) {
       perror("malloc");
       goto clean_exit;
     }
-    q->pilot_estimates = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(cell.nof_prb));
+
+    q->pilot_estimates = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(max_prb));
     if (!q->pilot_estimates) {
       perror("malloc");
       goto clean_exit;
     }      
-    q->pilot_estimates_average = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(cell.nof_prb));
+    q->pilot_estimates_average = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(max_prb));
     if (!q->pilot_estimates_average) {
       perror("malloc");
       goto clean_exit;
     }      
-    q->pilot_recv_signal = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(cell.nof_prb));
+    q->pilot_recv_signal = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_MAX_NUM_SF(max_prb));
     if (!q->pilot_recv_signal) {
       perror("malloc");
       goto clean_exit;
     }
     
-    if (srslte_interp_linear_vector_init(&q->srslte_interp_linvec, SRSLTE_NRE*cell.nof_prb)) {
+    if (srslte_interp_linear_vector_init(&q->srslte_interp_linvec, SRSLTE_NRE*max_prb)) {
       fprintf(stderr, "Error initializing vector interpolator\n");
       goto clean_exit; 
     }
 
-    if (srslte_interp_linear_init(&q->srslte_interp_lin, 2*cell.nof_prb, SRSLTE_NRE/2)) {
+    if (srslte_interp_linear_init(&q->srslte_interp_lin, 2*max_prb, SRSLTE_NRE/2)) {
       fprintf(stderr, "Error initializing interpolator\n");
       goto clean_exit; 
     }
     
-    if (srslte_pss_generate(q->pss_signal, cell.id%3)) {
-      fprintf(stderr, "Error initializing PSS signal for noise estimation\n");
-      goto clean_exit;
-    }
-    
-    q->noise_alg = SRSLTE_NOISE_ALG_REFS; 
+    q->noise_alg = SRSLTE_NOISE_ALG_REFS;
     
     q->smooth_filter_len = 3; 
     srslte_chest_dl_set_smooth_filter3_coeff(q, 0.1);
     
-    q->cell = cell; 
   }
   
   ret = SRSLTE_SUCCESS;
@@ -162,10 +157,45 @@ void srslte_chest_dl_free(srslte_chest_dl_t *q)
   bzero(q, sizeof(srslte_chest_dl_t));
 }
 
+int srslte_chest_dl_set_cell(srslte_chest_dl_t *q, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+  if (q                != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      ret = srslte_refsignal_cs_set_cell(&q->csr_signal, cell);
+      if (ret != SRSLTE_SUCCESS) {
+        fprintf(stderr, "Error initializing CSR signal (%d)\n",ret);
+        return SRSLTE_ERROR;
+      }
+      if (srslte_pss_generate(q->pss_signal, cell.id%3)) {
+        fprintf(stderr, "Error initializing PSS signal for noise estimation\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_interp_linear_vector_resize(&q->srslte_interp_linvec, SRSLTE_NRE*q->cell.nof_prb)) {
+        fprintf(stderr, "Error initializing vector interpolator\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_interp_linear_resize(&q->srslte_interp_lin, 2*q->cell.nof_prb, SRSLTE_NRE/2)) {
+        fprintf(stderr, "Error initializing interpolator\n");
+        return SRSLTE_ERROR;
+      }
+
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+
+  return ret;
+}
+
 /* Uses the difference between the averaged and non-averaged pilot estimates */
 static float estimate_noise_pilots(srslte_chest_dl_t *q, uint32_t port_id) 
 {
   int nref=SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, port_id);
+
   /* Substract noisy pilot estimates */
   srslte_vec_sub_ccc(q->pilot_estimates_average, q->pilot_estimates, q->tmp_noise, nref);  
   
@@ -318,7 +348,8 @@ int srslte_chest_dl_estimate_port(srslte_chest_dl_t *q, cf_t *input, cf_t *ce, u
   
   /* Use the known CSR signal to compute Least-squares estimates */
   srslte_vec_prod_conj_ccc(q->pilot_recv_signal, q->csr_signal.pilots[port_id/2][sf_idx], 
-              q->pilot_estimates, SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, port_id)); 
+              q->pilot_estimates, SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, port_id));
+
   if (ce != NULL) {
     
     /* Smooth estimates (if applicable) and interpolate */
@@ -370,7 +401,7 @@ int srslte_chest_dl_estimate_multi(srslte_chest_dl_t *q, cf_t *input[SRSLTE_MAX_
 int srslte_chest_dl_estimate(srslte_chest_dl_t *q, cf_t *input, cf_t *ce[SRSLTE_MAX_PORTS], uint32_t sf_idx) 
 {
   uint32_t port_id; 
-  
+
   for (port_id=0;port_id<q->cell.nof_ports;port_id++) {
     if (srslte_chest_dl_estimate_port(q, input, ce[port_id], sf_idx, port_id, 0)) {
       return SRSLTE_ERROR;

lib/src/phy/ch_estimation/chest_ul.c

@@ -32,6 +32,8 @@
 #include <string.h>
 #include <complex.h>
 #include <math.h>
+#include <srslte/srslte.h>
+#include <srslte/phy/common/phy_common.h>
 
 #include "srslte/config.h"
 
@@ -43,6 +45,9 @@
 #define NOF_REFS_SYM    (q->cell.nof_prb*SRSLTE_NRE)
 #define NOF_REFS_SF     (NOF_REFS_SYM*2) // 2 reference symbols per subframe
 
+#define MAX_REFS_SYM    (max_prb*SRSLTE_NRE)
+#define MAX_REFS_SF     (max_prb*SRSLTE_NRE*2) // 2 reference symbols per subframe
+
 /** 3GPP LTE Downlink channel estimator and equalizer. 
  * Estimates the channel in the resource elements transmitting references and interpolates for the rest
  * of the resource grid. 
@@ -52,52 +57,49 @@
  * This object depends on the srslte_refsignal_t object for creating the LTE CSR signal.  
 */
 
-int srslte_chest_ul_init(srslte_chest_ul_t *q, srslte_cell_t cell) 
+int srslte_chest_ul_init(srslte_chest_ul_t *q, uint32_t max_prb)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
-  if (q                != NULL &&
-      srslte_cell_isvalid(&cell)) 
+  if (q                != NULL)
   {
     bzero(q, sizeof(srslte_chest_ul_t));
 
-    q->cell = cell; 
-    
-    ret = srslte_refsignal_ul_init(&q->dmrs_signal, cell); 
+    ret = srslte_refsignal_ul_init(&q->dmrs_signal, max_prb);
     if (ret != SRSLTE_SUCCESS) {
       fprintf(stderr, "Error initializing CSR signal (%d)\n",ret);
       goto clean_exit;
     }
     
-    q->tmp_noise = srslte_vec_malloc(sizeof(cf_t) * NOF_REFS_SF);
+    q->tmp_noise = srslte_vec_malloc(sizeof(cf_t) * MAX_REFS_SF);
     if (!q->tmp_noise) {
       perror("malloc");
       goto clean_exit;
     }
-    q->pilot_estimates = srslte_vec_malloc(sizeof(cf_t) * NOF_REFS_SF);
+    q->pilot_estimates = srslte_vec_malloc(sizeof(cf_t) * MAX_REFS_SF);
     if (!q->pilot_estimates) {
       perror("malloc");
       goto clean_exit;
     }      
     for (int i=0;i<4;i++) {
-      q->pilot_estimates_tmp[i] = srslte_vec_malloc(sizeof(cf_t) * NOF_REFS_SF);
+      q->pilot_estimates_tmp[i] = srslte_vec_malloc(sizeof(cf_t) * MAX_REFS_SF);
       if (!q->pilot_estimates_tmp[i]) {
         perror("malloc");
         goto clean_exit;
       }      
     }
-    q->pilot_recv_signal = srslte_vec_malloc(sizeof(cf_t) * (NOF_REFS_SF+1));
+    q->pilot_recv_signal = srslte_vec_malloc(sizeof(cf_t) * (MAX_REFS_SF+1));
     if (!q->pilot_recv_signal) {
       perror("malloc");
       goto clean_exit;
     }
     
-    q->pilot_known_signal = srslte_vec_malloc(sizeof(cf_t) * (NOF_REFS_SF+1));
+    q->pilot_known_signal = srslte_vec_malloc(sizeof(cf_t) * (MAX_REFS_SF+1));
     if (!q->pilot_known_signal) {
       perror("malloc");
       goto clean_exit;
     }
     
-    if (srslte_interp_linear_vector_init(&q->srslte_interp_linvec, NOF_REFS_SYM)) {
+    if (srslte_interp_linear_vector_init(&q->srslte_interp_linvec, MAX_REFS_SYM)) {
       fprintf(stderr, "Error initializing vector interpolator\n");
       goto clean_exit; 
     }
@@ -105,12 +107,17 @@ int srslte_chest_ul_init(srslte_chest_ul_t *q, srslte_cell_t cell)
     q->smooth_filter_len = 3; 
     srslte_chest_ul_set_smooth_filter3_coeff(q, 0.3333);
   
-    q->dmrs_signal_configured = false; 
+    q->dmrs_signal_configured = false;
+
+    if (srslte_refsignal_dmrs_pusch_pregen_init(&q->dmrs_signal, &q->dmrs_pregen, max_prb)) {
+      fprintf(stderr, "Error allocating memory for pregenerated signals\n");
+      goto clean_exit;
+    }
   
   }
     
   ret = SRSLTE_SUCCESS;
-  
+
 clean_exit:
   if (ret != SRSLTE_SUCCESS) {
       srslte_chest_ul_free(q);
@@ -120,9 +127,8 @@ clean_exit:
 
 void srslte_chest_ul_free(srslte_chest_ul_t *q) 
 {
-  if (q->dmrs_signal_configured) {
-    srslte_refsignal_dmrs_pusch_pregen_free(&q->dmrs_signal, &q->dmrs_pregen);
-  }
+  srslte_refsignal_dmrs_pusch_pregen_free(&q->dmrs_signal, &q->dmrs_pregen);
+
   srslte_refsignal_ul_free(&q->dmrs_signal);
   if (q->tmp_noise) {
     free(q->tmp_noise);
@@ -146,6 +152,30 @@ void srslte_chest_ul_free(srslte_chest_ul_t *q)
   bzero(q, sizeof(srslte_chest_ul_t));
 }
 
+int srslte_chest_ul_set_cell(srslte_chest_ul_t *q, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+  if (q                != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      ret = srslte_refsignal_ul_set_cell(&q->dmrs_signal, cell);
+      if (ret != SRSLTE_SUCCESS) {
+        fprintf(stderr, "Error initializing CSR signal (%d)\n",ret);
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_interp_linear_vector_resize(&q->srslte_interp_linvec, NOF_REFS_SYM)) {
+        fprintf(stderr, "Error initializing vector interpolator\n");
+        return SRSLTE_ERROR;
+      }
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
 void srslte_chest_ul_set_cfg(srslte_chest_ul_t *q, 
                              srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,
                              srslte_pucch_cfg_t *pucch_cfg, 

lib/src/phy/ch_estimation/refsignal_dl.c

@@ -99,89 +99,99 @@ inline uint32_t srslte_refsignal_cs_nsymbol(uint32_t l, srslte_cp_t cp, uint32_t
 }
 
 
-/** Allocates and precomputes the Cell-Specific Reference (CSR) signal for 
- * the 20 slots in a subframe
+/** Allocates memory for the 20 slots in a subframe
  */
-int srslte_refsignal_cs_init(srslte_refsignal_cs_t * q, srslte_cell_t cell)
+int srslte_refsignal_cs_init(srslte_refsignal_cs_t * q, uint32_t max_prb)
 {
 
-  uint32_t c_init;
-  uint32_t i, ns, l, p;
-  uint32_t N_cp, mp;
-  srslte_sequence_t seq;
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
-  if (q != NULL &&
-      srslte_cell_isvalid(&cell)) 
+  if (q != NULL)
   {
     ret = SRSLTE_ERROR; 
-    
-    bzero(q, sizeof(srslte_refsignal_cs_t));
-    bzero(&seq, sizeof(srslte_sequence_t));
-    if (srslte_sequence_init(&seq, 2 * 2 * SRSLTE_MAX_PRB)) {
-      goto free_and_exit;
-    }
-    
-    if (SRSLTE_CP_ISNORM(cell.cp)) {
-      N_cp = 1;
-    } else {
-      N_cp = 0;
-    }
-    
-    q->cell = cell; 
-    
-    for (p=0;p<2;p++) {
-      for (i=0;i<SRSLTE_NSUBFRAMES_X_FRAME;i++) {
-        q->pilots[p][i] = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, 2*p));
+
+    for (int p=0;p<2;p++) {
+      for (int i=0;i<SRSLTE_NSUBFRAMES_X_FRAME;i++) {
+        q->pilots[p][i] = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_REFSIGNAL_NUM_SF(max_prb, 2*p));
         if (!q->pilots[p][i]) {
           perror("malloc");
           goto free_and_exit;
         }
       }      
     }
-    
-    for (ns=0;ns<SRSLTE_NSLOTS_X_FRAME;ns++) {
-      for (p=0;p<2;p++) {
-        uint32_t nsymbols = srslte_refsignal_cs_nof_symbols(2*p)/2;
-        for (l = 0; l < nsymbols; l++) {
-          /* Compute sequence init value */
-          uint32_t lp = srslte_refsignal_cs_nsymbol(l, cell.cp, 2*p);
-          c_init = 1024 * (7 * (ns + 1) + lp + 1) * (2 * cell.id + 1)
-            + 2 * cell.id + N_cp;
-          
-          /* generate sequence for this symbol and slot */
-          srslte_sequence_set_LTE_pr(&seq, c_init);
-          
-          /* Compute signal */
-          for (i = 0; i < 2*q->cell.nof_prb; i++) {
-            mp = i + SRSLTE_MAX_PRB - cell.nof_prb;
-            /* save signal */
-            q->pilots[p][ns/2][SRSLTE_REFSIGNAL_PILOT_IDX(i,(ns%2)*nsymbols+l,q->cell)] = 
-                                                  (1 - 2 * (float) seq.c[2 * mp]) / sqrt(2) +
-                                    _Complex_I * (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
-          }        
-        }
-        
-      }
-    }
-    srslte_sequence_free(&seq);
     ret = SRSLTE_SUCCESS;
   }
 free_and_exit:
   if (ret == SRSLTE_ERROR) {
-    srslte_sequence_free(&seq);
     srslte_refsignal_cs_free(q);
   }
   return ret;
 }
 
+/** Allocates and precomputes the Cell-Specific Reference (CSR) signal for
+ * the 20 slots in a subframe
+ */
+int srslte_refsignal_cs_set_cell(srslte_refsignal_cs_t * q, srslte_cell_t cell)
+{
+
+  uint32_t c_init;
+  uint32_t i, ns, l, p;
+  uint32_t N_cp, mp;
+  srslte_sequence_t seq;
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+
+      bzero(&seq, sizeof(srslte_sequence_t));
+      if (srslte_sequence_init(&seq, 2*2*SRSLTE_MAX_PRB)) {
+        return SRSLTE_ERROR;
+      }
+
+      if (SRSLTE_CP_ISNORM(cell.cp)) {
+        N_cp = 1;
+      } else {
+        N_cp = 0;
+      }
+
+      for (ns=0;ns<SRSLTE_NSLOTS_X_FRAME;ns++) {
+        for (p=0;p<2;p++) {
+          uint32_t nsymbols = srslte_refsignal_cs_nof_symbols(2*p)/2;
+          for (l = 0; l < nsymbols; l++) {
+            /* Compute sequence init value */
+            uint32_t lp = srslte_refsignal_cs_nsymbol(l, cell.cp, 2*p);
+            c_init = 1024 * (7 * (ns + 1) + lp + 1) * (2 * cell.id + 1)
+                     + 2 * cell.id + N_cp;
+
+            /* generate sequence for this symbol and slot */
+            srslte_sequence_set_LTE_pr(&seq, 2*2*SRSLTE_MAX_PRB, c_init);
+
+            /* Compute signal */
+            for (i = 0; i < 2*q->cell.nof_prb; i++) {
+              mp = i + SRSLTE_MAX_PRB - cell.nof_prb;
+              /* save signal */
+              q->pilots[p][ns/2][SRSLTE_REFSIGNAL_PILOT_IDX(i,(ns%2)*nsymbols+l,q->cell)] =
+                (1 - 2 * (float) seq.c[2 * mp]) / sqrt(2) +
+                _Complex_I * (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
+            }
+          }
+        }
+      }
+      srslte_sequence_free(&seq);
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
 /** Deallocates a srslte_refsignal_cs_t object allocated with srslte_refsignal_cs_init */
 void srslte_refsignal_cs_free(srslte_refsignal_cs_t * q)
 {
-  int i, p; 
-  
-  for (p=0;p<2;p++) {
-    for (i=0;i<SRSLTE_NSUBFRAMES_X_FRAME;i++) {
+  for (int p=0;p<2;p++) {
+    for (int i=0;i<SRSLTE_NSUBFRAMES_X_FRAME;i++) {
       if (q->pilots[p][i]) {
         free(q->pilots[p][i]);
       }

lib/src/phy/ch_estimation/refsignal_ul.c

@@ -29,6 +29,7 @@
 #include <strings.h>
 #include <stdlib.h>
 #include <complex.h>
+#include <srslte/phy/common/phy_common.h>
 
 #include "srslte/phy/common/phy_common.h"
 #include "srslte/phy/ch_estimation/refsignal_ul.h"
@@ -138,8 +139,8 @@ static int generate_n_prs(srslte_refsignal_ul_t * q) {
       }
       q->n_prs_pusch[delta_ss][ns] = n_prs;
     }
-    srslte_sequence_free(&seq);
   }
+  srslte_sequence_free(&seq);
 
   return SRSLTE_SUCCESS; 
 }
@@ -160,9 +161,9 @@ static int generate_srslte_sequence_hopping_v(srslte_refsignal_ul_t *q) {
         return SRSLTE_ERROR;
       }
       q->v_pusch[ns][delta_ss] = seq.c[ns];    
-      srslte_sequence_free(&seq);
     }
   }
+  srslte_sequence_free(&seq);
   return SRSLTE_SUCCESS;
 }
 
@@ -170,46 +171,24 @@ static int generate_srslte_sequence_hopping_v(srslte_refsignal_ul_t *q) {
 /** Initializes srslte_refsignal_ul_t object according to 3GPP 36.211 5.5
  *
  */
-int srslte_refsignal_ul_init(srslte_refsignal_ul_t * q, srslte_cell_t cell)
+int srslte_refsignal_ul_init(srslte_refsignal_ul_t * q, uint32_t max_prb)
 {
 
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
-  if (q != NULL && srslte_cell_isvalid(&cell)) {
+  if (q != NULL) {
 
     ret = SRSLTE_ERROR; 
     
     bzero(q, sizeof(srslte_refsignal_ul_t));
-    q->cell = cell; 
-    
+
     // Allocate temporal buffer for computing signal argument
-    q->tmp_arg = srslte_vec_malloc(SRSLTE_NRE * q->cell.nof_prb * sizeof(cf_t)); 
+    q->tmp_arg = srslte_vec_malloc(SRSLTE_NRE * max_prb * sizeof(cf_t));
     if (!q->tmp_arg) {
       perror("malloc");
       goto free_and_exit;
     }
     
-    srslte_pucch_cfg_default(&q->pucch_cfg);
-    
-    // Precompute n_prs
-    if (generate_n_prs(q)) {
-      goto free_and_exit;
-    }
-    
-    // Precompute group hopping values u. 
-    if (srslte_group_hopping_f_gh(q->f_gh, q->cell.id)) {
-      goto free_and_exit;
-    }
-    
-    // Precompute sequence hopping values v. Uses f_ss_pusch
-    if (generate_srslte_sequence_hopping_v(q)) {
-      goto free_and_exit;
-    }
-
-    if (srslte_pucch_n_cs_cell(q->cell, q->n_cs_cell)) {
-      goto free_and_exit;
-    }
-
     ret = SRSLTE_SUCCESS;
   }
 free_and_exit:
@@ -226,6 +205,45 @@ void srslte_refsignal_ul_free(srslte_refsignal_ul_t * q) {
   bzero(q, sizeof(srslte_refsignal_ul_t));
 }
 
+/** Initializes srslte_refsignal_ul_t object according to 3GPP 36.211 5.5
+ *
+ */
+int srslte_refsignal_ul_set_cell(srslte_refsignal_ul_t * q, srslte_cell_t cell)
+{
+
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q != NULL && srslte_cell_isvalid(&cell)) {
+
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+
+      srslte_pucch_cfg_default(&q->pucch_cfg);
+
+      // Precompute n_prs
+      if (generate_n_prs(q)) {
+        return SRSLTE_ERROR;
+      }
+
+      // Precompute group hopping values u.
+      if (srslte_group_hopping_f_gh(q->f_gh, q->cell.id)) {
+        return SRSLTE_ERROR;
+      }
+
+      // Precompute sequence hopping values v. Uses f_ss_pusch
+      if (generate_srslte_sequence_hopping_v(q)) {
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pucch_n_cs_cell(q->cell, q->n_cs_cell)) {
+        return SRSLTE_ERROR;
+      }
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
 void srslte_refsignal_ul_set_cfg(srslte_refsignal_ul_t *q, 
                                   srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,
                                   srslte_pucch_cfg_t *pucch_cfg, 
@@ -363,15 +381,38 @@ void compute_r(srslte_refsignal_ul_t *q, uint32_t nof_prb, uint32_t ns, uint32_t
 
 }
 
+int srslte_refsignal_dmrs_pusch_pregen_init(srslte_refsignal_ul_t *q, srslte_refsignal_ul_dmrs_pregen_t *pregen,
+                                            uint32_t max_prb)
+{
+  for (uint32_t sf_idx=0;sf_idx<SRSLTE_NSUBFRAMES_X_FRAME;sf_idx++) {
+    for (uint32_t cs=0;cs<SRSLTE_NOF_CSHIFT;cs++) {
+      pregen->r[cs][sf_idx] = (cf_t**) calloc(sizeof(cf_t*), max_prb + 1);
+      if (pregen->r[cs][sf_idx]) {
+        for (uint32_t n=0;n<=max_prb;n++) {
+          if (srslte_dft_precoding_valid_prb(n)) {
+            pregen->r[cs][sf_idx][n] = (cf_t*) srslte_vec_malloc(sizeof(cf_t)*n*2*SRSLTE_NRE);
+            if (pregen->r[cs][sf_idx][n]) {
+            } else {
+              return SRSLTE_ERROR;
+            }
+          }
+        }
+      } else {
+        return SRSLTE_ERROR;
+      }
+    }
+  }
+  return SRSLTE_SUCCESS;
+}
+
+
 int srslte_refsignal_dmrs_pusch_pregen(srslte_refsignal_ul_t *q, srslte_refsignal_ul_dmrs_pregen_t *pregen)
 {
   for (uint32_t sf_idx=0;sf_idx<SRSLTE_NSUBFRAMES_X_FRAME;sf_idx++) {
     for (uint32_t cs=0;cs<SRSLTE_NOF_CSHIFT;cs++) {
-      pregen->r[cs][sf_idx] = (cf_t**) calloc(sizeof(cf_t*), q->cell.nof_prb + 1);
       if (pregen->r[cs][sf_idx]) {
         for (uint32_t n=0;n<=q->cell.nof_prb;n++) {
           if (srslte_dft_precoding_valid_prb(n)) {
-            pregen->r[cs][sf_idx][n] = (cf_t*) srslte_vec_malloc(sizeof(cf_t)*n*2*SRSLTE_NRE);
             if (pregen->r[cs][sf_idx][n]) {
               if (srslte_refsignal_dmrs_pusch_gen(q, n, sf_idx, cs, pregen->r[cs][sf_idx][n])) {
                 return SRSLTE_ERROR; 

lib/src/phy/ch_estimation/test/chest_test_dl.c

@@ -29,6 +29,7 @@
 #include <strings.h>
 #include <unistd.h>
 #include <complex.h>
+#include <srslte/phy/common/phy_common.h>
 
 #include "srslte/srslte.h"
 
@@ -128,10 +129,13 @@ int main(int argc, char **argv) {
     cid = cell.id;
     max_cid = cell.id;
   }
-
+  if (srslte_chest_dl_init(&est, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    goto do_exit;
+  }
   while(cid <= max_cid) {
     cell.id = cid; 
-    if (srslte_chest_dl_init(&est, cell)) {
+    if (srslte_chest_dl_set_cell(&est, cell)) {
       fprintf(stderr, "Error initializing equalizer\n");
       goto do_exit;
     }
@@ -214,10 +218,10 @@ int main(int argc, char **argv) {
         }
       }
     }
-    srslte_chest_dl_free(&est);
     cid+=10;
     INFO("cid=%d\n", cid);
   }
+  srslte_chest_dl_free(&est);
 
 
   ret = 0;

lib/src/phy/ch_estimation/test/chest_test_ul.c

@@ -125,13 +125,17 @@ int main(int argc, char **argv) {
     max_cid = cell.id;
   }
   printf("max_cid=%d, cid=%d, cell.id=%d\n", max_cid, cid, cell.id);
+  if (srslte_chest_ul_init(&est, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    goto do_exit;
+  }
   while(cid <= max_cid) {
     cell.id = cid; 
-    if (srslte_chest_ul_init(&est, cell)) {
+    if (srslte_chest_ul_set_cell(&est, cell)) {
       fprintf(stderr, "Error initializing equalizer\n");
       goto do_exit;
     }
-    
+
     for (int n=6;n<=cell.nof_prb;n+=5) {
       if (srslte_dft_precoding_valid_prb(n)) {
         for (int delta_ss=29;delta_ss<SRSLTE_NOF_DELTA_SS;delta_ss++) {
@@ -213,9 +217,9 @@ int main(int argc, char **argv) {
     }
     cid+=10;
     printf("cid=%d\n", cid);
-    srslte_chest_ul_free(&est);
   }
 
+  srslte_chest_ul_free(&est);
 
   if (fmatlab) {
     fprintf(fmatlab, "input=");

lib/src/phy/ch_estimation/test/refsignal_ul_test.c

@@ -81,7 +81,12 @@ int main(int argc, char **argv) {
   
   parse_args(argc,argv);
 
-  if (srslte_refsignal_ul_init(&refs, cell)) {
+  if (srslte_refsignal_ul_init(&refs, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing UL reference signal\n");
+    goto do_exit;
+  }
+
+  if (srslte_refsignal_ul_set_cell(&refs, cell)) {
     fprintf(stderr, "Error initializing UL reference signal\n");
     goto do_exit;
   }

lib/src/phy/common/phy_common.c

@@ -235,7 +235,7 @@ int srslte_symbol_sz_power2(uint32_t nof_prb) {
     return 1024;
   } else if (nof_prb<=75) {
     return 1536;
-  } else if (nof_prb<=100) {
+  } else if (nof_prb<=110) {
     return 2048;
   } else {
     return -1;
@@ -257,7 +257,7 @@ int srslte_symbol_sz(uint32_t nof_prb) {
       return 768;
     } else if (nof_prb<=75) {
       return 1024;
-    } else if (nof_prb<=100) {
+    } else if (nof_prb<=110) {
       return 1536;
     } else {
       return SRSLTE_ERROR;

lib/src/phy/common/sequence.c

@@ -27,7 +27,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <strings.h>
-#include <assert.h>
+#include <pthread.h>
+#include <srslte/phy/common/sequence.h>
 
 #include "srslte/phy/common/sequence.h"
 #include "srslte/phy/utils/vector.h"
@@ -35,26 +36,75 @@
 
 #define Nc 1600
 
+#define MAX_SEQ_LEN  (128*1024)
+
+#define static_memory
 
 /*
  * Pseudo Random Sequence generation.
  * It follows the 3GPP Release 8 (LTE) 36.211
  * Section 7.2
  */
-void srslte_sequence_set_LTE_pr(srslte_sequence_t *q, uint32_t seed) {
+#ifdef static_memory
+static uint8_t x1[Nc+MAX_SEQ_LEN+31];
+static uint8_t x2[Nc+MAX_SEQ_LEN+31];
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+int srslte_sequence_set_LTE_pr(srslte_sequence_t *q, uint32_t len, uint32_t seed) {
+  int n;
+
+  if (len > q->max_len) {
+    fprintf(stderr, "Error generating pseudo-random sequence: len %d exceeds maximum len %d\n",
+            len, MAX_SEQ_LEN);
+    return -1;
+  }
+
+  if (len > q->max_len) {
+    fprintf(stderr, "Error generating pseudo-random sequence: len %d is greater than allocated len %d\n",
+            len, q->max_len);
+    return -1;
+  }
+  pthread_mutex_lock(&mutex);
+
+  for (n = 0; n < 31; n++) {
+    x2[n] = (seed >> n) & 0x1;
+  }
+  x1[0] = 1;
+
+  for (n = 0; n < Nc + len; n++) {
+    x1[n + 31] = (x1[n + 3] + x1[n]) & 0x1;
+    x2[n + 31] = (x2[n + 3] + x2[n + 2] + x2[n+1] + x2[n]) & 0x1;
+  }
+
+  for (n = 0; n < len; n++) {
+    q->c[n] = (x1[n + Nc] + x2[n + Nc]) & 0x1;
+  }
+  pthread_mutex_unlock(&mutex);
+
+  return 0;
+}
+
+#else
+int srslte_sequence_set_LTE_pr(srslte_sequence_t *q, uint32_t len, uint32_t seed) {
   int n;
   uint32_t *x1, *x2;
 
-  x1 = calloc(Nc + q->len + 31, sizeof(uint32_t));
+  if (len > q->max_len) {
+    fprintf(stderr, "Error generating pseudo-random sequence: len %d is greater than allocated len %d\n",
+            len, q->max_len);
+    return -1;
+  }
+
+  x1 = calloc(Nc + len + 31, sizeof(uint32_t));
   if (!x1) {
     perror("calloc");
-    return;
+    return -1;
   }
-  x2 = calloc(Nc + q->len + 31, sizeof(uint32_t));
+  x2 = calloc(Nc + len + 31, sizeof(uint32_t));
   if (!x2) {
     free(x1);
     perror("calloc");
-    return;
+    return -1;
   }
 
   for (n = 0; n < 31; n++) {
@@ -62,25 +112,29 @@ void srslte_sequence_set_LTE_pr(srslte_sequence_t *q, uint32_t seed) {
   }
   x1[0] = 1;
 
-  for (n = 0; n < Nc + q->len; n++) {
+  for (n = 0; n < Nc + len; n++) {
     x1[n + 31] = (x1[n + 3] + x1[n]) & 0x1;
     x2[n + 31] = (x2[n + 3] + x2[n + 2] + +x2[n+1] + x2[n]) & 0x1;
   }
 
-  for (n = 0; n < q->len; n++) {
+  for (n = 0; n < len; n++) {
     q->c[n] = (x1[n + Nc] + x2[n + Nc]) & 0x1;
   }
 
   free(x1);
   free(x2);
+
+  return 0;
 }
 
+#endif
+
 int srslte_sequence_LTE_pr(srslte_sequence_t *q, uint32_t len, uint32_t seed) {
   if (srslte_sequence_init(q, len)) {
     return SRSLTE_ERROR;
   }
-  q->len = len;
-  srslte_sequence_set_LTE_pr(q, seed);
+  q->cur_len = len;
+  srslte_sequence_set_LTE_pr(q, len, seed);
   srslte_bit_pack_vector(q->c, q->c_bytes, len);
   for (int i=0;i<len;i++) {
     q->c_float[i] = (1-2*q->c[i]);
@@ -90,17 +144,8 @@ int srslte_sequence_LTE_pr(srslte_sequence_t *q, uint32_t len, uint32_t seed) {
 }
 
 int srslte_sequence_init(srslte_sequence_t *q, uint32_t len) {
-  if (q->c && (q->len != len)) {
-    free(q->c);
-    if (q->c_bytes) {
-      free(q->c_bytes);
-    }
-    if (q->c_float) {
-      free(q->c_float);
-    }
-    if (q->c_short) {
-      free(q->c_short);
-    }
+  if (q->c && len > q->max_len) {
+    srslte_sequence_free(q);
   }
   if (!q->c) {
     q->c = srslte_vec_malloc(len * sizeof(uint8_t));
@@ -119,7 +164,7 @@ int srslte_sequence_init(srslte_sequence_t *q, uint32_t len) {
     if (!q->c_short) {
       return SRSLTE_ERROR;
     }
-    q->len = len;
+    q->max_len = len;
   }
   return SRSLTE_SUCCESS;
 }

lib/src/phy/dft/dft_fftw.c

@@ -29,6 +29,7 @@
 #include <complex.h>
 #include <fftw3.h>
 #include <string.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/dft/dft.h"
 #include "srslte/phy/utils/vector.h"
@@ -38,14 +39,27 @@
 
 #define FFTW_WISDOM_FILE ".fftw_wisdom"
 
+#ifdef FFTW_WISDOM_FILE
+#define FFTW_TYPE FFTW_MEASURE
+#else
+#define FFTW_TYPE 0
+#endif
+
+
 void srslte_dft_load() {
+#ifdef FFTW_WISDOM_FILE
   fftwf_import_wisdom_from_filename(FFTW_WISDOM_FILE);
+#else
+  printf("Warning: FFTW Wisdom file not defined\n");
+#endif
 }
 
 void srslte_dft_exit() {
+#ifdef FFTW_WISDOM_FILE
   if (!fftwf_export_wisdom_to_filename(FFTW_WISDOM_FILE)) {
     fprintf(stderr, "Error saving FFTW wisdom to file %s\n", FFTW_WISDOM_FILE);
   }
+#endif
 }
 
 int srslte_dft_plan(srslte_dft_plan_t *plan, const int dft_points, srslte_dft_dir_t dir,
@@ -58,19 +72,50 @@ int srslte_dft_plan(srslte_dft_plan_t *plan, const int dft_points, srslte_dft_di
   return 0;
 }
 
+int srslte_dft_replan(srslte_dft_plan_t *plan, const int new_dft_points) {
+  if (new_dft_points <= plan->init_size) {
+    if(plan->mode == SRSLTE_DFT_COMPLEX){
+      return srslte_dft_replan_c(plan,new_dft_points);
+    } else {
+      return srslte_dft_replan_r(plan,new_dft_points);
+    }
+  } else {
+    fprintf(stderr, "DFT: Error calling replan: new_dft_points (%d) must be lower or equal "
+      "dft_size passed initially (%d)\n", new_dft_points, plan->init_size);
+    return -1;
+  }
+}
+
+
+
 static void allocate(srslte_dft_plan_t *plan, int size_in, int size_out, int len) {
   plan->in = fftwf_malloc(size_in*len);
   plan->out = fftwf_malloc(size_out*len);
 }
 
+int srslte_dft_replan_c(srslte_dft_plan_t *plan, const int new_dft_points) {
+  int sign = (plan->dir == SRSLTE_DFT_FORWARD) ? FFTW_FORWARD : FFTW_BACKWARD;
+  if (plan->p) {
+    fftwf_destroy_plan(plan->p);
+    plan->p = NULL;
+  }
+  plan->p = fftwf_plan_dft_1d(new_dft_points, plan->in, plan->out, sign, FFTW_TYPE);
+  if (!plan->p) {
+    return -1;
+  }
+  plan->size = new_dft_points;
+  return 0;
+}
+
 int srslte_dft_plan_c(srslte_dft_plan_t *plan, const int dft_points, srslte_dft_dir_t dir) {
   allocate(plan,sizeof(fftwf_complex),sizeof(fftwf_complex), dft_points);
   int sign = (dir == SRSLTE_DFT_FORWARD) ? FFTW_FORWARD : FFTW_BACKWARD;
-  plan->p = fftwf_plan_dft_1d(dft_points, plan->in, plan->out, sign, FFTW_MEASURE);
+  plan->p = fftwf_plan_dft_1d(dft_points, plan->in, plan->out, sign, FFTW_TYPE);
   if (!plan->p) {
     return -1;
   }
   plan->size = dft_points;
+  plan->init_size = plan->size;
   plan->mode = SRSLTE_DFT_COMPLEX;
   plan->dir = dir;
   plan->forward = (dir==SRSLTE_DFT_FORWARD)?true:false;
@@ -82,14 +127,29 @@ int srslte_dft_plan_c(srslte_dft_plan_t *plan, const int dft_points, srslte_dft_
   return 0;
 }
 
+int srslte_dft_replan_r(srslte_dft_plan_t *plan, const int new_dft_points) {
+  int sign = (plan->dir == SRSLTE_DFT_FORWARD) ? FFTW_R2HC : FFTW_HC2R;
+  if (plan->p) {
+    fftwf_destroy_plan(plan->p);
+    plan->p = NULL;
+  }
+  plan->p = fftwf_plan_r2r_1d(new_dft_points, plan->in, plan->out, sign, FFTW_TYPE);
+  if (!plan->p) {
+    return -1;
+  }
+  plan->size = new_dft_points;
+  return 0;
+}
+
 int srslte_dft_plan_r(srslte_dft_plan_t *plan, const int dft_points, srslte_dft_dir_t dir) {
   allocate(plan,sizeof(float),sizeof(float), dft_points);
   int sign = (dir == SRSLTE_DFT_FORWARD) ? FFTW_R2HC : FFTW_HC2R;
-  plan->p = fftwf_plan_r2r_1d(dft_points, plan->in, plan->out, sign, FFTW_MEASURE);
+  plan->p = fftwf_plan_r2r_1d(dft_points, plan->in, plan->out, sign, FFTW_TYPE);
   if (!plan->p) {
     return -1;
   }
   plan->size = dft_points;
+  plan->init_size = plan->size;
   plan->mode = SRSLTE_REAL;
   plan->dir = dir;
   plan->forward = (dir==SRSLTE_DFT_FORWARD)?true:false;

lib/src/phy/dft/dft_precoding.c

@@ -40,37 +40,42 @@
 #include "srslte/phy/dft/dft_precoding.h"
 
 /* Create DFT plans for transform precoding */
-int srslte_dft_precoding_init(srslte_dft_precoding_t *q, uint32_t max_prb) 
+
+int srslte_dft_precoding_init(srslte_dft_precoding_t *q, uint32_t max_prb, bool is_tx)
 {
-  int ret = SRSLTE_ERROR_INVALID_INPUTS; 
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
   bzero(q, sizeof(srslte_dft_precoding_t));
-  
+
   if (max_prb <= SRSLTE_MAX_PRB) {
-    ret = SRSLTE_ERROR; 
+    ret = SRSLTE_ERROR;
     for (uint32_t i=1;i<=max_prb;i++) {
-      if(srslte_dft_precoding_valid_prb(i)) {        
+      if(srslte_dft_precoding_valid_prb(i)) {
         DEBUG("Initiating DFT precoding plan for %d PRBs\n", i);
-        if (srslte_dft_plan_c(&q->dft_plan[i], i*SRSLTE_NRE, SRSLTE_DFT_FORWARD)) {
+        if (srslte_dft_plan_c(&q->dft_plan[i], i*SRSLTE_NRE, is_tx?SRSLTE_DFT_FORWARD:SRSLTE_DFT_BACKWARD)) {
           fprintf(stderr, "Error: Creating DFT plan %d\n",i);
           goto clean_exit;
         }
         srslte_dft_plan_set_norm(&q->dft_plan[i], true);
-        if (srslte_dft_plan_c(&q->idft_plan[i], i*SRSLTE_NRE, SRSLTE_DFT_BACKWARD)) {
-          fprintf(stderr, "Error: Creating DFT plan %d\n",i);
-          goto clean_exit;
-        }
-        srslte_dft_plan_set_norm(&q->idft_plan[i], true);
       }
     }
     q->max_prb = max_prb;
     ret = SRSLTE_SUCCESS;
-  } 
+  }
 
-clean_exit:
+  clean_exit:
   if (ret == SRSLTE_ERROR) {
     srslte_dft_precoding_free(q);
   }
-  return ret; 
+  return ret;
+}
+
+int srslte_dft_precoding_init_rx(srslte_dft_precoding_t *q, uint32_t max_prb)
+{
+  return srslte_dft_precoding_init(q, max_prb, false);
+}
+
+int srslte_dft_precoding_init_tx(srslte_dft_precoding_t *q, uint32_t max_prb) {
+  return srslte_dft_precoding_init(q, max_prb, true);
 }
 
 /* Free DFT plans for transform precoding */
@@ -79,7 +84,6 @@ void srslte_dft_precoding_free(srslte_dft_precoding_t  *q)
   for (uint32_t i=1;i<=q->max_prb;i++) {
     if(srslte_dft_precoding_valid_prb(i)) {      
       srslte_dft_plan_free(&q->dft_plan[i]);
-      srslte_dft_plan_free(&q->idft_plan[i]);        
     }
   }  
   bzero(q, sizeof(srslte_dft_precoding_t));
@@ -98,7 +102,7 @@ bool srslte_dft_precoding_valid_prb(uint32_t nof_prb) {
 }
 
 int srslte_dft_precoding(srslte_dft_precoding_t *q, cf_t *input, cf_t *output, 
-                  uint32_t nof_prb, uint32_t nof_symbols) 
+                         uint32_t nof_prb, uint32_t nof_symbols)
 {
   
   if (!srslte_dft_precoding_valid_prb(nof_prb) && nof_prb <= q->max_prb) {
@@ -112,19 +116,3 @@ int srslte_dft_precoding(srslte_dft_precoding_t *q, cf_t *input, cf_t *output,
   
   return SRSLTE_SUCCESS;
 }
-
-int srslte_dft_predecoding(srslte_dft_precoding_t *q, cf_t *input, cf_t *output, 
-                    uint32_t nof_prb, uint32_t nof_symbols)
-{
-  if (!srslte_dft_precoding_valid_prb(nof_prb) && nof_prb <= q->max_prb) {
-    fprintf(stderr, "Error invalid number of PRB (%d)\n", nof_prb);
-    return SRSLTE_ERROR; 
-  }
-
-  for (uint32_t i=0;i<nof_symbols;i++) {
-    srslte_dft_run_c(&q->idft_plan[nof_prb], &input[i*SRSLTE_NRE*nof_prb], &output[i*SRSLTE_NRE*nof_prb]);
-  }
-  
-  return SRSLTE_SUCCESS;
-  
-}

lib/src/phy/dft/ofdm.c

@@ -29,6 +29,7 @@
 #include <stdlib.h>
 #include <complex.h>
 #include <math.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/common/phy_common.h"
 #include "srslte/phy/dft/dft.h"
@@ -48,6 +49,12 @@ int srslte_ofdm_init_(srslte_ofdm_t *q, srslte_cp_t cp, int symbol_sz, int nof_p
     return -1;
   }
 
+  q->shift_buffer = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_SF_LEN(symbol_sz));
+  if (!q->shift_buffer) {
+    perror("malloc");
+    return -1;
+  }
+
   srslte_dft_plan_set_mirror(&q->fft_plan, true);
   srslte_dft_plan_set_dc(&q->fft_plan, true);
 
@@ -55,7 +62,6 @@ int srslte_ofdm_init_(srslte_ofdm_t *q, srslte_cp_t cp, int symbol_sz, int nof_p
   q->nof_symbols = SRSLTE_CP_NSYMB(cp);
   q->cp = cp;
   q->freq_shift = false;
-  q->shift_buffer = NULL; 
   q->nof_re = nof_prb * SRSLTE_NRE;
   q->nof_guards = ((symbol_sz - q->nof_re) / 2);
   q->slot_sz = SRSLTE_SLOT_LEN(symbol_sz);
@@ -67,6 +73,32 @@ int srslte_ofdm_init_(srslte_ofdm_t *q, srslte_cp_t cp, int symbol_sz, int nof_p
   return SRSLTE_SUCCESS;
 }
 
+
+int srslte_ofdm_replan_(srslte_ofdm_t *q, srslte_cp_t cp, int symbol_sz, int nof_prb) {
+
+  if (srslte_dft_replan_c(&q->fft_plan, symbol_sz)) {
+    fprintf(stderr, "Error: Creating DFT plan\n");
+    return -1;
+  }
+
+  q->symbol_sz = (uint32_t) symbol_sz;
+  q->nof_symbols = SRSLTE_CP_NSYMB(cp);
+  q->cp = cp;
+  q->nof_re = nof_prb * SRSLTE_NRE;
+  q->nof_guards = ((symbol_sz - q->nof_re) / 2);
+  q->slot_sz = SRSLTE_SLOT_LEN(symbol_sz);
+
+  if (q->freq_shift) {
+    srslte_ofdm_set_freq_shift(q, q->freq_shift_f);
+  }
+
+  DEBUG("Replan symbol_sz=%d, nof_symbols=%d, cp=%s, nof_re=%d, nof_guards=%d\n",
+        q->symbol_sz, q->nof_symbols,
+        q->cp==SRSLTE_CP_NORM?"Normal":"Extended", q->nof_re, q->nof_guards);
+
+  return SRSLTE_SUCCESS;
+}
+
 void srslte_ofdm_free_(srslte_ofdm_t *q) {
   srslte_dft_plan_free(&q->fft_plan);
   if (q->tmp) {
@@ -78,30 +110,28 @@ void srslte_ofdm_free_(srslte_ofdm_t *q) {
   bzero(q, sizeof(srslte_ofdm_t));
 }
 
-int srslte_ofdm_rx_init(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t nof_prb) {
-  int symbol_sz = srslte_symbol_sz(nof_prb);
+int srslte_ofdm_rx_init(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t max_prb) {
+  int symbol_sz = srslte_symbol_sz(max_prb);
   if (symbol_sz < 0) {
-    fprintf(stderr, "Error: Invalid nof_prb=%d\n", nof_prb);
+    fprintf(stderr, "Error: Invalid nof_prb=%d\n", max_prb);
     return -1;
   }
-  return srslte_ofdm_init_(q, cp, symbol_sz, nof_prb, SRSLTE_DFT_FORWARD);
+  q->max_prb = max_prb;
+  return srslte_ofdm_init_(q, cp, symbol_sz, max_prb, SRSLTE_DFT_FORWARD);
 }
 
-void srslte_ofdm_rx_free(srslte_ofdm_t *q) {
-  srslte_ofdm_free_(q);
-}
-
-int srslte_ofdm_tx_init(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t nof_prb) {
+int srslte_ofdm_tx_init(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t max_prb) {
   uint32_t i;
   int ret;
   
-  int symbol_sz = srslte_symbol_sz(nof_prb);
+  int symbol_sz = srslte_symbol_sz(max_prb);
   if (symbol_sz < 0) {
-    fprintf(stderr, "Error: Invalid nof_prb=%d\n", nof_prb);
+    fprintf(stderr, "Error: Invalid nof_prb=%d\n", max_prb);
     return -1;
   }
+  q->max_prb = max_prb;
 
-  ret = srslte_ofdm_init_(q, cp, symbol_sz, nof_prb, SRSLTE_DFT_BACKWARD); 
+  ret = srslte_ofdm_init_(q, cp, symbol_sz, max_prb, SRSLTE_DFT_BACKWARD);
   
   if (ret == SRSLTE_SUCCESS) {
     srslte_dft_plan_set_norm(&q->fft_plan, false);
@@ -115,16 +145,57 @@ int srslte_ofdm_tx_init(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t nof_prb) {
   return ret;
 }
 
+int srslte_ofdm_rx_set_prb(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t nof_prb) {
+  if (nof_prb <= q->max_prb) {
+    int symbol_sz = srslte_symbol_sz(nof_prb);
+    if (symbol_sz < 0) {
+      fprintf(stderr, "Error: Invalid nof_prb=%d\n", nof_prb);
+      return -1;
+    }
+    return srslte_ofdm_replan_(q, cp, symbol_sz, nof_prb);
+  } else {
+    fprintf(stderr, "OFDM: Error calling set_prb: nof_prb must be equal or lower initialized max_prb\n");
+    return -1;
+  }
+}
+
+int srslte_ofdm_tx_set_prb(srslte_ofdm_t *q, srslte_cp_t cp, uint32_t nof_prb) {
+  uint32_t i;
+  int ret;
+
+  if (nof_prb <= q->max_prb) {
+    int symbol_sz = srslte_symbol_sz(nof_prb);
+    if (symbol_sz < 0) {
+      fprintf(stderr, "Error: Invalid nof_prb=%d\n", nof_prb);
+      return -1;
+    }
+
+    ret = srslte_ofdm_replan_(q, cp, symbol_sz, nof_prb);
+
+    if (ret == SRSLTE_SUCCESS) {
+      /* set now zeros at CP */
+      for (i=0;i<q->nof_symbols;i++) {
+        bzero(q->tmp, q->nof_guards * sizeof(cf_t));
+        bzero(&q->tmp[q->nof_re + q->nof_guards], q->nof_guards * sizeof(cf_t));
+      }
+    }
+    return ret;
+  } else {
+    fprintf(stderr, "OFDM: Error calling set_prb: nof_prb must be equal or lower initialized max_prb\n");
+    return -1;
+  }
+}
+
+
+void srslte_ofdm_rx_free(srslte_ofdm_t *q) {
+  srslte_ofdm_free_(q);
+}
+
 /* Shifts the signal after the iFFT or before the FFT. 
  * Freq_shift is relative to inter-carrier spacing.
  * Caution: This function shall not be called during run-time 
  */
 int srslte_ofdm_set_freq_shift(srslte_ofdm_t *q, float freq_shift) {
-  q->shift_buffer = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_SF_LEN(q->symbol_sz));
-  if (!q->shift_buffer) {
-    perror("malloc");
-    return -1; 
-  }
   cf_t *ptr = q->shift_buffer;
   for (uint32_t n=0;n<2;n++) {
     for (uint32_t i=0;i<q->nof_symbols;i++) {
@@ -140,7 +211,7 @@ int srslte_ofdm_set_freq_shift(srslte_ofdm_t *q, float freq_shift) {
   srslte_dft_plan_set_dc(&q->fft_plan, false);  
  
   q->freq_shift = true;
-  
+  q->freq_shift_f = freq_shift;
   return SRSLTE_SUCCESS;
 }
 

lib/src/phy/enb/enb_dl.c

@@ -29,6 +29,8 @@
 #include <complex.h>
 #include <math.h>
 #include <string.h>
+#include <srslte/phy/common/phy_common.h>
+#include <srslte/srslte.h>
 
 
 #define CURRENT_FFTSIZE   srslte_symbol_sz(q->cell.nof_prb)
@@ -39,78 +41,67 @@
 
 #define SRSLTE_ENB_RF_AMP 0.1
 
-int srslte_enb_dl_init(srslte_enb_dl_t *q, srslte_cell_t cell)
+int srslte_enb_dl_init(srslte_enb_dl_t *q, uint32_t max_prb)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS; 
   
-  if (q                 != NULL &&
-      srslte_cell_isvalid(&cell))   
+  if (q != NULL)
   {
     ret = SRSLTE_ERROR;
     
     bzero(q, sizeof(srslte_enb_dl_t));
     
-    q->cell = cell;
-    q->cfi  = 3; 
+    q->cfi  = 3;
     q->tx_amp = SRSLTE_ENB_RF_AMP;
     
-    if (srslte_ofdm_tx_init(&q->ifft, q->cell.cp, q->cell.nof_prb)) {
+    if (srslte_ofdm_tx_init(&q->ifft, SRSLTE_CP_NORM, max_prb)) {
       fprintf(stderr, "Error initiating FFT\n");
       goto clean_exit;
     }
 
     srslte_ofdm_set_normalize(&q->ifft, true);
 
-    if (srslte_regs_init(&q->regs, q->cell)) {
-      fprintf(stderr, "Error initiating REGs\n");
-      goto clean_exit;
-    }
-    if (srslte_pbch_init(&q->pbch, q->cell)) {
+    if (srslte_pbch_init(&q->pbch)) {
       fprintf(stderr, "Error creating PBCH object\n");
       goto clean_exit;
     }
-    if (srslte_pcfich_init(&q->pcfich, &q->regs, q->cell)) {
+    if (srslte_pcfich_init(&q->pcfich, 0)) {
       fprintf(stderr, "Error creating PCFICH object\n");
       goto clean_exit;
     }
-    if (srslte_phich_init(&q->phich, &q->regs, q->cell)) {
+    if (srslte_phich_init(&q->phich, 0)) {
       fprintf(stderr, "Error creating PHICH object\n");
       goto clean_exit;
     }
 
-    if (srslte_pdcch_init(&q->pdcch, &q->regs, q->cell)) {
+    if (srslte_pdcch_init_enb(&q->pdcch, max_prb)) {
       fprintf(stderr, "Error creating PDCCH object\n");
       goto clean_exit;
     }
 
-    if (srslte_pdsch_init_tx(&q->pdsch, q->cell)) {
+    if (srslte_pdsch_init_enb(&q->pdsch, max_prb)) {
       fprintf(stderr, "Error creating PDSCH object\n");
       goto clean_exit;
     }
     
-    if (srslte_refsignal_cs_init(&q->csr_signal, q->cell)) {
+    if (srslte_refsignal_cs_init(&q->csr_signal, max_prb)) {
       fprintf(stderr, "Error initializing CSR signal (%d)\n",ret);
       goto clean_exit;
     }
     
-    for (int i=0;i<q->cell.nof_ports;i++) {
-      q->sf_symbols[i] = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
+    for (int i=0;i<SRSLTE_MAX_PORTS;i++) {
+      q->sf_symbols[i] = srslte_vec_malloc(SRSLTE_SF_LEN_RE(max_prb, SRSLTE_CP_NORM) * sizeof(cf_t));
       if (!q->sf_symbols[i]) {
         perror("malloc");
         goto clean_exit; 
       }
-      q->slot1_symbols[i] = &q->sf_symbols[i][CURRENT_SLOTLEN_RE];
+      q->slot1_symbols[i] = &q->sf_symbols[i][SRSLTE_SLOT_LEN_RE(max_prb, SRSLTE_CP_NORM)];
     }
     
-    /* Generate PSS/SSS signals */
-    srslte_pss_generate(q->pss_signal, cell.id%3);
-    srslte_sss_generate(q->sss_signal0, q->sss_signal5, cell.id);
-    
     ret = SRSLTE_SUCCESS;
     
   } else {
-    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
-            cell.id, cell.nof_ports, cell.nof_prb);      
+    fprintf(stderr, "Invalid parameters\n");
   }
 
 clean_exit: 
@@ -125,6 +116,7 @@ void srslte_enb_dl_free(srslte_enb_dl_t *q)
   if (q) {
     srslte_ofdm_tx_free(&q->ifft);
     srslte_regs_free(&q->regs);
+    srslte_pbch_free(&q->pbch);
     srslte_pcfich_free(&q->pcfich);
     srslte_phich_free(&q->phich);
     srslte_pdcch_free(&q->pdcch);
@@ -141,6 +133,71 @@ void srslte_enb_dl_free(srslte_enb_dl_t *q)
   }  
 }
 
+int srslte_enb_dl_set_cell(srslte_enb_dl_t *q, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                 != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    srslte_enb_dl_set_cfi(q, 3);
+    q->tx_amp = SRSLTE_ENB_RF_AMP;
+
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      if (q->cell.nof_prb != 0) {
+        srslte_regs_free(&q->regs);
+      }
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      if (srslte_regs_init(&q->regs, q->cell)) {
+        fprintf(stderr, "Error resizing REGs\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_ofdm_rx_set_prb(&q->ifft, q->cell.cp, q->cell.nof_prb)) {
+        fprintf(stderr, "Error initiating FFT\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_pbch_set_cell(&q->pbch, q->cell)) {
+        fprintf(stderr, "Error creating PBCH object\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_pcfich_set_cell(&q->pcfich, &q->regs, q->cell)) {
+        fprintf(stderr, "Error creating PCFICH object\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_phich_set_cell(&q->phich, &q->regs, q->cell)) {
+        fprintf(stderr, "Error creating PHICH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pdcch_set_cell(&q->pdcch, &q->regs, q->cell)) {
+        fprintf(stderr, "Error creating PDCCH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pdsch_set_cell(&q->pdsch, q->cell)) {
+        fprintf(stderr, "Error creating PDSCH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_refsignal_cs_set_cell(&q->csr_signal, q->cell)) {
+        fprintf(stderr, "Error initializing CSR signal (%d)\n",ret);
+        return SRSLTE_ERROR;
+      }
+      /* Generate PSS/SSS signals */
+      srslte_pss_generate(q->pss_signal, cell.id%3);
+      srslte_sss_generate(q->sss_signal0, q->sss_signal5, cell.id);
+    }
+    ret = SRSLTE_SUCCESS;
+
+  } else {
+    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
+            cell.id, cell.nof_ports, cell.nof_prb);
+  }
+  return ret;
+}
+
+
+
 void srslte_enb_dl_set_amp(srslte_enb_dl_t *q, float amp)
 {
   q->tx_amp = amp; 
@@ -263,11 +320,11 @@ int srslte_enb_dl_put_pdcch_ul(srslte_enb_dl_t *q, srslte_ra_ul_dci_t *grant,
 }
 
 int srslte_enb_dl_put_pdsch(srslte_enb_dl_t *q, srslte_ra_dl_grant_t *grant, srslte_softbuffer_tx_t *softbuffer[SRSLTE_MAX_CODEWORDS],
-                            uint16_t rnti, uint32_t rv_idx, uint32_t sf_idx, 
-                            uint8_t *data[SRSLTE_MAX_CODEWORDS])
+                            uint16_t rnti, int rv_idx[SRSLTE_MAX_CODEWORDS], uint32_t sf_idx,
+                            uint8_t *data[SRSLTE_MAX_CODEWORDS], srslte_mimo_type_t mimo_type, uint32_t pmi)
 {  
   /* Configure pdsch_cfg parameters */
-  if (srslte_pdsch_cfg(&q->pdsch_cfg, q->cell, grant, q->cfi, sf_idx, rv_idx)) {
+  if (srslte_pdsch_cfg_mimo(&q->pdsch_cfg, q->cell, grant, q->cfi, sf_idx, rv_idx, mimo_type, pmi)) {
     fprintf(stderr, "Error configuring PDSCH\n");
     return SRSLTE_ERROR;
   }

lib/src/phy/enb/enb_ul.c

@@ -39,78 +39,54 @@
 
 #define MAX_CANDIDATES  16
 
-int srslte_enb_ul_init(srslte_enb_ul_t *q, srslte_cell_t cell, 
-                       srslte_prach_cfg_t *prach_cfg, 
-                       srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg, 
-                       srslte_pusch_hopping_cfg_t *hopping_cfg, 
-                       srslte_pucch_cfg_t *pucch_cfg)
+int srslte_enb_ul_init(srslte_enb_ul_t *q,
+                       uint32_t max_prb)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS; 
   
-  if (q                 != NULL &&
-      srslte_cell_isvalid(&cell))   
+  if (q != NULL)
   {
     ret = SRSLTE_ERROR;
     
     bzero(q, sizeof(srslte_enb_ul_t));
     
-    q->cell = cell;
-    
-    if (hopping_cfg) {
-      memcpy(&q->hopping_cfg, hopping_cfg, sizeof(srslte_pusch_hopping_cfg_t));
-    } 
-    
     q->users = calloc(sizeof(srslte_enb_ul_user_t*), (1+SRSLTE_SIRNTI));
     if (!q->users) {
       perror("malloc");
       goto clean_exit;
     }
     
-    if (srslte_ofdm_rx_init(&q->fft, q->cell.cp, q->cell.nof_prb)) {
+    if (srslte_ofdm_rx_init(&q->fft, SRSLTE_CP_NORM, max_prb)) {
       fprintf(stderr, "Error initiating FFT\n");
       goto clean_exit;
     }
     srslte_ofdm_set_normalize(&q->fft, false);
     srslte_ofdm_set_freq_shift(&q->fft, -0.5);
 
-    if (srslte_pucch_init(&q->pucch, q->cell)) {
+    if (srslte_pucch_init(&q->pucch)) {
       fprintf(stderr, "Error creating PUCCH object\n");
       goto clean_exit;
     }
 
-    if (srslte_pusch_init(&q->pusch, q->cell)) {
+    if (srslte_pusch_init_enb(&q->pusch, max_prb)) {
       fprintf(stderr, "Error creating PUSCH object\n");
       goto clean_exit;
     }
-    
-    if (prach_cfg) {
-      if (srslte_prach_init_cfg(&q->prach, prach_cfg, q->cell.nof_prb)) {
-        fprintf(stderr, "Error initiating PRACH\n");
-        goto clean_exit; 
-      }
-      srslte_prach_set_detect_factor(&q->prach, 60);    
-    }
-    
+
     srslte_pucch_set_threshold(&q->pucch, 0.8);
-    
-    if (srslte_chest_ul_init(&q->chest, cell)) {
+
+    if (srslte_chest_ul_init(&q->chest, max_prb)) {
       fprintf(stderr, "Error initiating channel estimator\n");
       goto clean_exit; 
     }
-    
-    // Configure common PUCCH configuration 
-    srslte_pucch_set_cfg(&q->pucch, pucch_cfg, pusch_cfg->group_hopping_en);
-    
-    // SRS is a dedicated configuration
-    srslte_chest_ul_set_cfg(&q->chest, pusch_cfg, pucch_cfg, NULL);
-        
-    q->sf_symbols = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
+
+    q->sf_symbols = srslte_vec_malloc(SRSLTE_SF_LEN_RE(max_prb, SRSLTE_CP_NORM) * sizeof(cf_t));
     if (!q->sf_symbols) {
       perror("malloc");
       goto clean_exit; 
     }
     
-    q->ce = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
+    q->ce = srslte_vec_malloc(SRSLTE_SF_LEN_RE(max_prb, SRSLTE_CP_NORM) * sizeof(cf_t));
     if (!q->ce) {
       perror("malloc");
       goto clean_exit; 
@@ -119,8 +95,7 @@ int srslte_enb_ul_init(srslte_enb_ul_t *q, srslte_cell_t cell,
     ret = SRSLTE_SUCCESS;
     
   } else {
-    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
-            cell.id, cell.nof_ports, cell.nof_prb);      
+    fprintf(stderr, "Invalid parameters\n");
   }
 
 clean_exit: 
@@ -135,7 +110,7 @@ void srslte_enb_ul_free(srslte_enb_ul_t *q)
   if (q) {
     
     if (q->users) {
-      for (int i=0;i<SRSLTE_SIRNTI;i++) {
+      for (int i=0;i<=SRSLTE_SIRNTI;i++) {
         if (q->users[i]) {
           free(q->users[i]);
         }
@@ -158,11 +133,73 @@ void srslte_enb_ul_free(srslte_enb_ul_t *q)
   }  
 }
 
+int srslte_enb_ul_set_cell(srslte_enb_ul_t *q, srslte_cell_t cell,
+                           srslte_prach_cfg_t *prach_cfg,
+                           srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,
+                           srslte_pusch_hopping_cfg_t *hopping_cfg,
+                           srslte_pucch_cfg_t *pucch_cfg)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                 != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+
+      if (hopping_cfg) {
+        memcpy(&q->hopping_cfg, hopping_cfg, sizeof(srslte_pusch_hopping_cfg_t));
+      }
+
+      if (srslte_ofdm_rx_set_prb(&q->fft, q->cell.cp, q->cell.nof_prb)) {
+        fprintf(stderr, "Error initiating FFT\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pucch_set_cell(&q->pucch, q->cell)) {
+        fprintf(stderr, "Error creating PUCCH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pusch_set_cell(&q->pusch, q->cell)) {
+        fprintf(stderr, "Error creating PUSCH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (prach_cfg) {
+        if (srslte_prach_init_cfg(&q->prach, prach_cfg, q->cell.nof_prb)) {
+          fprintf(stderr, "Error initiating PRACH\n");
+          return SRSLTE_ERROR;
+        }
+        srslte_prach_set_detect_factor(&q->prach, 60);
+      }
+
+      if (srslte_chest_ul_set_cell(&q->chest, cell)) {
+        fprintf(stderr, "Error initiating channel estimator\n");
+        return SRSLTE_ERROR;
+      }
+
+      // Configure common PUCCH configuration
+      srslte_pucch_set_cfg(&q->pucch, pucch_cfg, pusch_cfg->group_hopping_en);
+
+      // SRS is a dedicated configuration
+      srslte_chest_ul_set_cfg(&q->chest, pusch_cfg, pucch_cfg, NULL);
+
+      ret = SRSLTE_SUCCESS;
+    }
+  } else {
+    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
+            cell.id, cell.nof_ports, cell.nof_prb);
+  }
+  return ret;
+}
+
+
 int srslte_enb_ul_add_rnti(srslte_enb_ul_t *q, uint16_t rnti)
 {
   if (!q->users[rnti]) {
     q->users[rnti] = calloc(1, sizeof(srslte_enb_ul_user_t));
-    
+
     if (srslte_pucch_set_crnti(&q->pucch, rnti)) {
       fprintf(stderr, "Error setting PUCCH rnti\n");
       return -1;
@@ -183,7 +220,7 @@ void srslte_enb_ul_rem_rnti(srslte_enb_ul_t *q, uint16_t rnti)
   if (q->users[rnti]) {
     free(q->users[rnti]); 
     q->users[rnti] = NULL; 
-    srslte_pusch_clear_rnti(&q->pusch, rnti);
+    srslte_pusch_free_rnti(&q->pusch, rnti);
   }
 }
 

lib/src/phy/phch/cqi.c

@@ -272,10 +272,10 @@ float srslte_cqi_to_coderate(uint32_t cqi) {
  * Table III. 
 */
 // From paper
-static float cqi_to_snr_table[15] = { 1.95, 4, 6, 8, 10, 11.95, 14.05, 16, 17.9, 19.9, 21.5, 23.45, 25.0, 27.30, 29};
+//static float cqi_to_snr_table[15] = { 1.95, 4, 6, 8, 10, 11.95, 14.05, 16, 17.9, 19.9, 21.5, 23.45, 25.0, 27.30, 29};
 
 // From experimental measurements @ 5 MHz 
-//static float cqi_to_snr_table[15] = { 1, 1.75, 3, 4, 5, 6, 7.5, 9, 11.5, 13.0, 15.0, 18, 20, 22.5, 26.5};
+static float cqi_to_snr_table[15] = { 1, 1.75, 3, 4, 5, 6, 7.5, 9, 11.5, 13.0, 15.0, 18, 20, 22.5, 26.5};
 
 uint8_t srslte_cqi_from_snr(float snr)
 {

lib/src/phy/phch/pbch.c

@@ -32,6 +32,8 @@
 #include <stdbool.h>
 #include <assert.h>
 #include <math.h>
+#include <srslte/srslte.h>
+#include <srslte/phy/common/phy_common.h>
 
 #include "prb_dl.h"
 #include "srslte/phy/phch/pbch.h"
@@ -43,7 +45,6 @@
 #define PBCH_RE_CP_NORM    240
 #define PBCH_RE_CP_EXT     216
 
-
 const uint8_t srslte_crc_mask[4][16] = {
     { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 
     { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, 
@@ -139,33 +140,18 @@ int srslte_pbch_get(cf_t *slot1_data, cf_t *pbch, srslte_cell_t cell) {
  * At the receiver, the field nof_ports in the cell structure indicates the 
  * maximum number of BS transmitter ports to look for.  
  */
-int srslte_pbch_init(srslte_pbch_t *q, srslte_cell_t cell) {
+int srslte_pbch_init(srslte_pbch_t *q) {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
-  if (q                       != NULL &&
-      srslte_cell_isvalid(&cell))
+  if (q != NULL)
   {
     ret = SRSLTE_ERROR;
 
     bzero(q, sizeof(srslte_pbch_t));
-    
-    if (cell.nof_ports == 0) {
-      q->search_all_ports = true; 
-      cell.nof_ports = SRSLTE_MAX_PORTS; 
-    } else {
-      q->search_all_ports = false; 
-    }
-    
-    q->cell = cell;
-    q->nof_symbols = (SRSLTE_CP_ISNORM(q->cell.cp)) ? PBCH_RE_CP_NORM : PBCH_RE_CP_EXT;
-    
+
     if (srslte_modem_table_lte(&q->mod, SRSLTE_MOD_QPSK)) {
       goto clean;
     }
-    if (srslte_sequence_pbch(&q->seq, q->cell.cp, q->cell.id)) {
-      goto clean;
-    }
-
     int poly[3] = { 0x6D, 0x4F, 0x57 };
     if (srslte_viterbi_init(&q->decoder, SRSLTE_VITERBI_37, poly, 40, true)) {
       goto clean;
@@ -178,12 +164,14 @@ int srslte_pbch_init(srslte_pbch_t *q, srslte_cell_t cell) {
     q->encoder.tail_biting = true;
     memcpy(q->encoder.poly, poly, 3 * sizeof(int));
 
+    q->nof_symbols = PBCH_RE_CP_NORM;
+
     q->d = srslte_vec_malloc(sizeof(cf_t) * q->nof_symbols);
     if (!q->d) {
       goto clean;
     }
     int i;
-    for (i = 0; i < q->cell.nof_ports; i++) {
+    for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
       q->ce[i] = srslte_vec_malloc(sizeof(cf_t) * q->nof_symbols);
       if (!q->ce[i]) {
         goto clean;
@@ -209,6 +197,7 @@ int srslte_pbch_init(srslte_pbch_t *q, srslte_cell_t cell) {
     if (!q->rm_b) {
       goto clean;
     }
+
     ret = SRSLTE_SUCCESS;
   }
 clean: 
@@ -219,11 +208,11 @@ clean:
 }
 
 void srslte_pbch_free(srslte_pbch_t *q) {
-  if (q->d) {
-    free(q->d);
-  }
+  srslte_sequence_free(&q->seq);
+  srslte_modem_table_free(&q->mod);
+  srslte_viterbi_free(&q->decoder);
   int i;
-  for (i = 0; i < q->cell.nof_ports; i++) {
+  for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
     if (q->ce[i]) {
       free(q->ce[i]);
     }
@@ -243,12 +232,36 @@ void srslte_pbch_free(srslte_pbch_t *q) {
   if (q->rm_b) {
     free(q->rm_b);
   }
-  srslte_sequence_free(&q->seq);
-  srslte_modem_table_free(&q->mod);
-  srslte_viterbi_free(&q->decoder);
-
+  if (q->d) {
+    free(q->d);
+  }
   bzero(q, sizeof(srslte_pbch_t));
+}
 
+int srslte_pbch_set_cell(srslte_pbch_t *q, srslte_cell_t cell) {
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                       != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    if (cell.nof_ports == 0) {
+      q->search_all_ports = true;
+      cell.nof_ports = SRSLTE_MAX_PORTS;
+    } else {
+      q->search_all_ports = false;
+    }
+
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      if (srslte_sequence_pbch(&q->seq, q->cell.cp, q->cell.id)) {
+        return SRSLTE_ERROR;
+      }
+    }
+    q->nof_symbols = (SRSLTE_CP_ISNORM(q->cell.cp)) ? PBCH_RE_CP_NORM : PBCH_RE_CP_EXT;
+
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
 }
 
 
@@ -476,6 +489,7 @@ int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRS
     } else {
       nant = q->cell.nof_ports; 
     }
+
     do {
       if (nant != 3) {
         DEBUG("Trying %d TX antennas with %d frames\n", nant, q->frame_idx);
@@ -486,7 +500,7 @@ int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRS
           srslte_predecoding_single(q->symbols[0], q->ce[0], q->d, q->nof_symbols, noise_estimate);
         } else {
           srslte_predecoding_diversity(q->symbols[0], q->ce, x, nant,
-              q->nof_symbols);
+                                       q->nof_symbols);
           srslte_layerdemap_diversity(x, q->d, nant, q->nof_symbols / nant);
         }
 
@@ -577,7 +591,7 @@ int srslte_pbch_encode(srslte_pbch_t *q, uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_
     if (q->cell.nof_ports > 1) {
       srslte_layermap_diversity(q->d, x, q->cell.nof_ports, q->nof_symbols);
       srslte_precoding_diversity(x, q->symbols, q->cell.nof_ports,
-          q->nof_symbols / q->cell.nof_ports);
+                                 q->nof_symbols / q->cell.nof_ports);
     } else {
       memcpy(q->symbols[0], q->d, q->nof_symbols * sizeof(cf_t));
     }

lib/src/phy/phch/pcfich.c

@@ -57,38 +57,24 @@ bool srslte_pcfich_exists(int nframe, int nslot) {
   return true;
 }
 
-int srslte_pcfich_init(srslte_pcfich_t *q, srslte_regs_t *regs, srslte_cell_t cell) {
-  return srslte_pcfich_init_multi(q, regs, cell, 1);  
-}
-
 /** Initializes the pcfich channel receiver. 
  * On error, returns -1 and frees the structrure 
  */
-int srslte_pcfich_init_multi(srslte_pcfich_t *q, srslte_regs_t *regs, srslte_cell_t cell, uint32_t nof_rx_antennas) {
+int srslte_pcfich_init(srslte_pcfich_t *q, uint32_t nof_rx_antennas) {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
   
-  if (q                         != NULL &&
-      regs                      != NULL &&
-      srslte_cell_isvalid(&cell)) 
+  if (q != NULL)
   {   
     ret = SRSLTE_ERROR;
     
     bzero(q, sizeof(srslte_pcfich_t));
-    q->cell = cell;
-    q->regs = regs;
+    q->nof_rx_antennas = nof_rx_antennas;
     q->nof_symbols = PCFICH_RE;
-    q->nof_rx_antennas = nof_rx_antennas; 
-    
+
     if (srslte_modem_table_lte(&q->mod, SRSLTE_MOD_QPSK)) {
       goto clean;
     }
 
-    for (int nsf = 0; nsf < SRSLTE_NSUBFRAMES_X_FRAME; nsf++) {
-      if (srslte_sequence_pcfich(&q->seq[nsf], 2 * nsf, q->cell.id)) {
-        goto clean;
-      }
-    }
-    
     /* convert cfi bit tables to floats for demodulation */
     for (int i=0;i<3;i++) {
       for (int j=0;j<PCFICH_CFI_LEN;j++) {
@@ -115,6 +101,28 @@ void srslte_pcfich_free(srslte_pcfich_t *q) {
   bzero(q, sizeof(srslte_pcfich_t));
 }
 
+int srslte_pcfich_set_cell(srslte_pcfich_t *q, srslte_regs_t *regs, srslte_cell_t cell) {
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                         != NULL &&
+      regs                      != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    q->regs = regs;
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      for (int nsf = 0; nsf < SRSLTE_NSUBFRAMES_X_FRAME; nsf++) {
+        if (srslte_sequence_pcfich(&q->seq[nsf], 2 * nsf, q->cell.id)) {
+          return SRSLTE_ERROR;
+        }
+      }
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
+
 /** Finds the CFI with minimum distance with the vector of received 32 bits.
  * Saves the CFI value in the cfi pointer and returns the distance.
  */
@@ -197,7 +205,7 @@ int srslte_pcfich_decode_multi(srslte_pcfich_t *q, cf_t *sf_symbols[SRSLTE_MAX_P
       }
 
       q_symbols[j] = q->symbols[j];
-      
+
       /* extract channel estimates */
       for (i = 0; i < q->cell.nof_ports; i++) {
         if (q->nof_symbols != srslte_regs_pcfich_get(q->regs, ce[i][j], q->ce[i][j])) {

lib/src/phy/phch/pdcch.c

@@ -61,41 +61,20 @@ float srslte_pdcch_coderate(uint32_t nof_bits, uint32_t l) {
 }
 
 /** Initializes the PDCCH transmitter and receiver */
-int srslte_pdcch_init(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t cell) {
-  return srslte_pdcch_init_multi(q, regs, cell, 1);
-}
-
-int srslte_pdcch_init_tx(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t cell) {
-  return srslte_pdcch_init_txrx(q, regs, cell, 1, false);
-}
-
-int srslte_pdcch_init_rx(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t cell, uint32_t nof_rx_antennas) {
-  return srslte_pdcch_init_txrx(q, regs, cell, nof_rx_antennas, true);
-}
-
-int srslte_pdcch_init_multi(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t cell, uint32_t nof_rx_antennas) {
-  return srslte_pdcch_init_txrx(q, regs, cell, nof_rx_antennas, true);
-}
-
-int srslte_pdcch_init_txrx(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t cell, uint32_t nof_rx_antennas, bool isReceiver)
+static int pdcch_init(srslte_pdcch_t *q, uint32_t max_prb, uint32_t nof_rx_antennas, bool is_ue)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
-  if (q                         != NULL &&
-      regs                      != NULL &&
-      srslte_cell_isvalid(&cell)) 
+  if (q != NULL)
   {   
     ret = SRSLTE_ERROR;
     bzero(q, sizeof(srslte_pdcch_t));
-    q->cell = cell;
-    q->regs = regs;
-    q->nof_rx_antennas = nof_rx_antennas; 
-    
+    q->nof_rx_antennas = nof_rx_antennas;
+    q->is_ue           = is_ue;
     /* Allocate memory for the maximum number of PDCCH bits (CFI=3) */
-    q->max_bits = (srslte_regs_pdcch_nregs(q->regs, 3) / 9) * 72;
+    q->max_bits = max_prb*3*12*2;
 
-    INFO("Init PDCCH: Max bits: %d, %d ports.\n", 
-         q->max_bits, q->cell.nof_ports);
+    INFO("Init PDCCH: Max bits: %d\n", q->max_bits);
 
     if (srslte_modem_table_lte(&q->mod, SRSLTE_MOD_QPSK)) {
       goto clean;
@@ -104,14 +83,6 @@ int srslte_pdcch_init_txrx(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t
       goto clean;
     }
 
-    for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
-      // we need to pregenerate the sequence for the maximum number of bits, which is 8 times 
-      // the maximum number of REGs (for CFI=3)
-      if (srslte_sequence_pdcch(&q->seq[i], 2 * i, q->cell.id, 8*srslte_regs_pdcch_nregs(q->regs, 3))) {
-        goto clean;
-      }
-    }
-
     int poly[3] = { 0x6D, 0x4F, 0x57 };
     if (srslte_viterbi_init(&q->decoder, SRSLTE_VITERBI_37, poly, SRSLTE_DCI_MAX_BITS + 16, true)) {
       goto clean;
@@ -134,29 +105,23 @@ int srslte_pdcch_init_txrx(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t
       goto clean;
     }
 
-    if (isReceiver) {
-      for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
-        for (int j = 0; j < q->nof_rx_antennas; j++) {
-          q->ce[i][j] = srslte_vec_malloc(sizeof(cf_t) * q->max_bits / 2);
-          if (!q->ce[i][j]) {
-            goto clean;
-          }
-        }
-      }
-    }
-
     for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
       q->x[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_bits / 2);
       if (!q->x[i]) {
         goto clean;
       }
-    }
-
-    for (int j = 0; j < ((isReceiver) ? q->nof_rx_antennas : cell.nof_ports); j++) {
-      q->symbols[j] = srslte_vec_malloc(sizeof(cf_t) * q->max_bits / 2);
-      if (!q->symbols[j]) {
+      q->symbols[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_bits / 2);
+      if (!q->symbols[i]) {
         goto clean;
       }
+      if (q->is_ue) {
+        for (int j = 0; j < q->nof_rx_antennas; j++) {
+          q->ce[i][j] = srslte_vec_malloc(sizeof(cf_t) * q->max_bits / 2);
+          if (!q->ce[i][j]) {
+            goto clean;
+          }
+        }
+      }
     }
 
     ret = SRSLTE_SUCCESS;
@@ -168,6 +133,14 @@ int srslte_pdcch_init_txrx(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t
   return ret;
 }
 
+int srslte_pdcch_init_enb(srslte_pdcch_t *q, uint32_t max_prb) {
+  return pdcch_init(q, max_prb, 0, false);
+}
+
+int srslte_pdcch_init_ue(srslte_pdcch_t *q, uint32_t max_prb, uint32_t nof_rx_antennas) {
+  return pdcch_init(q, max_prb, nof_rx_antennas, true);
+}
+
 void srslte_pdcch_free(srslte_pdcch_t *q) {
 
   if (q->e) {
@@ -180,18 +153,18 @@ void srslte_pdcch_free(srslte_pdcch_t *q) {
     free(q->d);
   }
   for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
-    for (int j=0;j<q->nof_rx_antennas;j++) {
-      if (q->ce[i][j]) {
-        free(q->ce[i][j]);
-      }      
-    }
     if (q->x[i]) {
       free(q->x[i]);
     }
-  }
-  for (int j=0;j<q->nof_rx_antennas;j++) {
-    if (q->symbols[j]) {
-      free(q->symbols[j]);
+    if (q->symbols[i]) {
+      free(q->symbols[i]);
+    }
+    if (q->is_ue) {
+      for (int j=0;j<q->nof_rx_antennas;j++) {
+        if (q->ce[i][j]) {
+          free(q->ce[i][j]);
+        }
+      }
     }
   }
   for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
@@ -205,6 +178,39 @@ void srslte_pdcch_free(srslte_pdcch_t *q) {
 
 }
 
+int srslte_pdcch_set_cell(srslte_pdcch_t *q, srslte_regs_t *regs, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                         != NULL &&
+      regs                      != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+    q->regs = regs;
+
+    /* Allocate memory for the maximum number of PDCCH bits (CFI=3) */
+    q->max_bits = (srslte_regs_pdcch_nregs(q->regs, 3) / 9) * 72;
+
+    INFO("PDCCH: Cell config PCI=%d, %d ports.\n",
+         q->cell.id, q->cell.nof_ports);
+
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+
+      for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
+        // we need to pregenerate the sequence for the maximum number of bits, which is 8 times
+        // the maximum number of REGs (for CFI=3)
+        if (srslte_sequence_pdcch(&q->seq[i], 2 * i, q->cell.id, 8*srslte_regs_pdcch_nregs(q->regs, 3))) {
+          return SRSLTE_ERROR;
+        }
+      }
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
+
 uint32_t srslte_pdcch_ue_locations(srslte_pdcch_t *q, srslte_dci_location_t *c, uint32_t max_candidates,
                         uint32_t nsubframe, uint32_t cfi, uint16_t rnti) 
 {
@@ -490,7 +496,7 @@ int srslte_pdcch_extract_llr_multi(srslte_pdcch_t *q, cf_t *sf_symbols[SRSLTE_MA
 
     /* descramble */
     srslte_scrambling_f_offset(&q->seq[nsubframe], q->llr, 0, e_bits);
-    
+
     ret = SRSLTE_SUCCESS;
   } 
   return ret;  

lib/src/phy/phch/pdsch.c

@@ -27,25 +27,22 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
-#include <strings.h>
 #include <stdlib.h>
 #include <stdbool.h>
-#include <assert.h>
-#include <math.h>
+#include <srslte/phy/phch/pdsch_cfg.h>
+#include <srslte/phy/common/sequence.h>
+#include <srslte/phy/phch/pdsch.h>
 
 #include "prb_dl.h"
 #include "srslte/phy/phch/pdsch.h"
-#include "srslte/phy/phch/sch.h"
-#include "srslte/phy/common/phy_common.h"
-#include "srslte/phy/utils/bit.h"
 #include "srslte/phy/utils/debug.h"
 #include "srslte/phy/utils/vector.h"
+#include "srslte/phy/utils/bit.h"
 
 
 #define MAX_PDSCH_RE(cp) (2 * SRSLTE_CP_NSYMB(cp) * 12)
 
 
-
 const static srslte_mod_t modulations[4] =
     { SRSLTE_MOD_BPSK, SRSLTE_MOD_QPSK, SRSLTE_MOD_16QAM, SRSLTE_MOD_64QAM };
     
@@ -197,30 +194,24 @@ int srslte_pdsch_get(srslte_pdsch_t *q, cf_t *sf_symbols, cf_t *symbols,
   return srslte_pdsch_cp(q, sf_symbols, symbols, grant, lstart, subframe, false);
 }
 
-/** Initializes the PDCCH transmitter or receiver */
-int srslte_pdsch_init(srslte_pdsch_t *q, srslte_cell_t cell, uint32_t nof_antennas, bool is_receiver)
+/** Initializes the PDSCH transmitter and receiver */
+static int pdsch_init(srslte_pdsch_t *q, uint32_t max_prb, bool is_ue, uint32_t nof_antennas)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
-  int i;
 
- if (q != NULL                  &&
-     srslte_cell_isvalid(&cell) && 
-     nof_antennas <= SRSLTE_MAX_PORTS) 
-  {   
+  if (q != NULL)
+  {
     
     bzero(q, sizeof(srslte_pdsch_t));
     ret = SRSLTE_ERROR;
     
-    q->cell = cell;
-    q->max_re = q->cell.nof_prb * MAX_PDSCH_RE(q->cell.cp);
-    if (is_receiver) {
-      q->nof_rx_antennas = nof_antennas;
-    }
+    q->max_re          = max_prb * MAX_PDSCH_RE(q->cell.cp);
+    q->is_ue           = is_ue;
+    q->nof_rx_antennas = nof_antennas;
 
-    INFO("Init PDSCH: %d ports %d PRBs, max_symbols: %d\n", q->cell.nof_ports,
-        q->cell.nof_prb, q->max_re);
+    INFO("Init PDSCH: %d PRBs, max_symbols: %d\n", max_prb, q->max_re);
 
-    for (i = 0; i < 4; i++) {
+    for (int i = 0; i < 4; i++) {
       if (srslte_modem_table_lte(&q->mod[i], modulations[i])) {
         goto clean;
       }
@@ -232,7 +223,7 @@ int srslte_pdsch_init(srslte_pdsch_t *q, srslte_cell_t cell, uint32_t nof_antenn
       goto clean;
     }
 
-    for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
+    for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
       // Allocate int16_t for reception (LLRs)
       q->e[i] = srslte_vec_malloc(sizeof(int16_t) * q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM));
       if (!q->e[i]) {
@@ -245,18 +236,17 @@ int srslte_pdsch_init(srslte_pdsch_t *q, srslte_cell_t cell, uint32_t nof_antenn
       }
     }
 
-    /* Layer mapped symbols memory allocation */
-    for (i = 0; i < q->cell.nof_ports; i++) {
+    for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
       q->x[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
       if (!q->x[i]) {
         goto clean;
       }
-    }
-
-    /* If it is the receiver side, allocate estimated channel */
-    if (is_receiver) {
-      for (i = 0; i < q->cell.nof_ports; i++) {
-        for (int j = 0; j < q->nof_rx_antennas; j++) {
+      q->symbols[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
+      if (!q->symbols[i]) {
+        goto clean;
+      }
+      if (q->is_ue) {
+        for (int j=0;j<q->nof_rx_antennas;j++) {
           q->ce[i][j] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
           if (!q->ce[i][j]) {
             goto clean;
@@ -264,42 +254,40 @@ int srslte_pdsch_init(srslte_pdsch_t *q, srslte_cell_t cell, uint32_t nof_antenn
         }
       }
     }
-    for (int j=0;j<SRSLTE_MAX(q->nof_rx_antennas, q->cell.nof_ports);j++) {
-      q->symbols[j] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
-      if (!q->symbols[j]) {
-        goto clean;
-      }              
-    }
-    
-    /* Allocate User memory (all zeros) */
-    q->users = calloc(sizeof(srslte_pdsch_user_t*), 1+SRSLTE_SIRNTI);
+
+    q->users = calloc(sizeof(srslte_pdsch_user_t*), q->is_ue?1:(1+SRSLTE_SIRNTI));
     if (!q->users) {
       perror("malloc");
       goto clean;
     }
- }
 
-  ret = SRSLTE_SUCCESS;
+    if (srslte_sequence_init(&q->tmp_seq, q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM))) {
+      goto clean;
+    }
+
+    ret = SRSLTE_SUCCESS;
+  }
 
-  clean:
+  clean: 
   if (ret == SRSLTE_ERROR) {
     srslte_pdsch_free(q);
   }
   return ret;
 }
 
-int srslte_pdsch_init_tx(srslte_pdsch_t *q, srslte_cell_t cell) {
-  return srslte_pdsch_init(q, cell, 0, false);
+int srslte_pdsch_init_ue(srslte_pdsch_t *q, uint32_t max_prb, uint32_t nof_antennas)
+{
+  return pdsch_init(q, max_prb, true, nof_antennas);
 }
 
-int srslte_pdsch_init_rx(srslte_pdsch_t *q, srslte_cell_t cell, uint32_t nof_antennas) {
-  return srslte_pdsch_init(q, cell, nof_antennas, true);
+int srslte_pdsch_init_enb(srslte_pdsch_t *q, uint32_t max_prb)
+{
+  return pdsch_init(q, max_prb, false, 0);
 }
 
 void srslte_pdsch_free(srslte_pdsch_t *q) {
-  int i;
 
-  for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
+  for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
 
     if (q->e[i]) {
       free(q->e[i]);
@@ -313,69 +301,107 @@ void srslte_pdsch_free(srslte_pdsch_t *q) {
   /* Free sch objects */
   srslte_sch_free(&q->dl_sch);
 
-  for (i = 0; i < q->cell.nof_ports; i++) {
+  for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
     if (q->x[i]) {
       free(q->x[i]);
     }
-    for (int j=0;j<q->nof_rx_antennas;j++) {
-      if (q->ce[i][j]) {
-        free(q->ce[i][j]);
+    if (q->symbols[i]) {
+      free(q->symbols[i]);
+    }
+    if (q->is_ue) {
+      for (int j=0;j<q->nof_rx_antennas;j++) {
+        if (q->ce[i][j]) {
+          free(q->ce[i][j]);
+        }
       }
     }
   }
-  for (int j=0;j<SRSLTE_MAX_PORTS;j++) {
-    if (q->symbols[j]) {
-      free(q->symbols[j]);
-    }          
-  }
   if (q->users) {
-    for (uint16_t u=0;u<SRSLTE_SIRNTI;u++) {
-      if (q->users[u]) {
-        srslte_pdsch_free_rnti(q, u);
+    if (q->is_ue) {
+      srslte_pdsch_free_rnti(q, 0);
+    } else {
+      for (int u=0;u<=SRSLTE_SIRNTI;u++) {
+        if (q->users[u]) {
+          srslte_pdsch_free_rnti(q, u);
+        }
       }
-    }      
+    }
     free(q->users);
   }
-  for (i = 0; i < 4; i++) {
+
+  srslte_sequence_free(&q->tmp_seq);
+
+  for (int i = 0; i < 4; i++) {
     srslte_modem_table_free(&q->mod[i]);
   }
 
   bzero(q, sizeof(srslte_pdsch_t));
 }
 
-/* Precalculate the PDSCH scramble sequences for a given RNTI. This function takes a while
+int srslte_pdsch_set_cell(srslte_pdsch_t *q, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q != NULL                  &&
+      srslte_cell_isvalid(&cell))
+  {
+    memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+    q->max_re = q->cell.nof_prb * MAX_PDSCH_RE(q->cell.cp);
+
+    INFO("PDSCH: Cell config PCI=%d, %d ports, %d PRBs, max_symbols: %d\n", q->cell.nof_ports,
+         q->cell.id, q->cell.nof_prb, q->max_re);
+
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
+/* Precalculate the PDSCH scramble sequences for a given RNTI. This function takes a while 
  * to execute, so shall be called once the final C-RNTI has been allocated for the session.
  */
 int srslte_pdsch_set_rnti(srslte_pdsch_t *q, uint16_t rnti) {
-  uint32_t i, j;
-  if (!q->users[rnti]) {
-    q->users[rnti] = calloc(1, sizeof(srslte_pdsch_user_t));
-    if (q->users[rnti]) {
-      for (i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
-        for (j = 0; j < SRSLTE_MAX_CODEWORDS; j++) {
-          if (srslte_sequence_pdsch(&q->users[rnti]->seq[j][i], rnti, j, 2 * i, q->cell.id,
-                                    q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM))) {
-            ERROR("Generating scrambling sequence");
-            return SRSLTE_ERROR;
-          }
+  uint32_t rnti_idx = q->is_ue?0:rnti;
+
+  if (!q->users[rnti_idx] || q->is_ue) {
+    if (!q->users[rnti_idx]) {
+      q->users[rnti_idx] = calloc(1, sizeof(srslte_pdsch_user_t));
+      if(!q->users[rnti_idx]) {
+        perror("calloc");
+        return -1;
+      }
+    }
+    for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
+      for (int j = 0; j < SRSLTE_MAX_CODEWORDS; j++) {
+        if (srslte_sequence_pdsch(&q->users[rnti_idx]->seq[j][i], rnti, j, 2 * i, q->cell.id,
+                                  q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM)))
+        {
+          fprintf(stderr, "Error initializing PDSCH scrambling sequence\n");
+          srslte_pdsch_free_rnti(q, rnti);
+          return SRSLTE_ERROR;
         }
       }
-      q->users[rnti]->sequence_generated = true;
     }
+    q->ue_rnti = rnti; 
+    q->users[rnti_idx]->cell_id = q->cell.id;
+    q->users[rnti_idx]->sequence_generated = true;
+  } else {
+    fprintf(stderr, "Error generating PDSCH sequence: rnti=0x%x already generated\n", rnti);
   }
   return SRSLTE_SUCCESS;
 }
 
 void srslte_pdsch_free_rnti(srslte_pdsch_t* q, uint16_t rnti)
 {
-  if (q->users[rnti]) {
+  uint32_t rnti_idx = q->is_ue?0:rnti;
+  if (q->users[rnti_idx]) {
     for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
       for (int j = 0; j < SRSLTE_MAX_CODEWORDS; j++) {
-        srslte_sequence_free(&q->users[rnti]->seq[j][i]);
+        srslte_sequence_free(&q->users[rnti_idx]->seq[j][i]);
       }
     }
-    free(q->users[rnti]);
-    q->users[rnti] = NULL;
+    free(q->users[rnti_idx]);
+    q->users[rnti_idx] = NULL;
+    q->ue_rnti = 0;
   }
 }
 
@@ -390,7 +416,7 @@ static void pdsch_decode_debug(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg,
         break;
       }
       DEBUG("SAVED FILE %s: received subframe symbols\n", filename);
-      srslte_vec_save_file(filename, sf_symbols, SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
+      srslte_vec_save_file(filename, sf_symbols[j], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
 
       for (int i = 0; i < q->cell.nof_ports; i++) {
         if (snprintf(filename, FILENAME_MAX, "hest_%d%d.dat", i, j) < 0) {
@@ -401,11 +427,21 @@ static void pdsch_decode_debug(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg,
         srslte_vec_save_file(filename, ce[i][j], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
       }
     }
-    DEBUG("SAVED FILE pdsch_symbols.dat: symbols after equalization\n",0);
-    srslte_vec_save_file("pdsch_symbols.dat", q->d, cfg->nbits[0].nof_re*sizeof(cf_t));
+    for (int i=0;i<cfg->nof_layers;i++) {
+      if (snprintf(filename, FILENAME_MAX, "pdsch_symbols_%d.dat", i) < 0) {
+        ERROR("Generating file name");
+        break;
+      }
+      DEBUG("SAVED FILE %s: symbols after equalization\n", filename);
+      srslte_vec_save_file(filename, q->d[i], cfg->nbits[0].nof_re*sizeof(cf_t));
 
-    DEBUG("SAVED FILE llr.dat: LLR estimates after demodulation and descrambling\n",0);
-    srslte_vec_save_file("llr.dat", q->e, cfg->nbits[0].nof_bits*sizeof(int16_t));
+      if (snprintf(filename, FILENAME_MAX, "llr_%d.dat", i) < 0) {
+        ERROR("Generating file name");
+        break;
+      }
+      DEBUG("SAVED FILE %s: LLR estimates after demodulation and descrambling\n", filename);
+      srslte_vec_save_file(filename, q->e[i], cfg->nbits[0].nof_bits*sizeof(int16_t));
+    }
   }
 }
 
@@ -491,7 +527,25 @@ int srslte_pdsch_cfg_mimo(srslte_pdsch_cfg_t *cfg, srslte_cell_t cell, srslte_ra
   }
 }
 
-static int srslte_pdsch_codeword_encode(srslte_pdsch_t *pdsch, srslte_pdsch_cfg_t *cfg,
+static srslte_sequence_t *get_user_sequence(srslte_pdsch_t *q, uint16_t rnti,
+                                            uint32_t codeword_idx, uint32_t sf_idx, uint32_t len)
+{
+  uint32_t rnti_idx = q->is_ue?0:rnti;
+
+  // The scrambling sequence is pregenerated for all RNTIs in the eNodeB but only for C-RNTI in the UE
+  if (q->users[rnti_idx] && q->users[rnti_idx]->sequence_generated &&
+      q->users[rnti_idx]->cell_id == q->cell.id                    &&
+      q->ue_rnti == rnti                                           &&
+      ((rnti >= SRSLTE_CRNTI_START && rnti < SRSLTE_CRNTI_END) || !q->is_ue))
+  {
+    return &q->users[rnti_idx]->seq[codeword_idx][sf_idx];
+  } else {
+    srslte_sequence_pdsch(&q->tmp_seq, rnti, codeword_idx, 2 * sf_idx, q->cell.id, len);
+    return &q->tmp_seq;
+  }
+}
+
+static int srslte_pdsch_codeword_encode(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg,
                                                srslte_softbuffer_tx_t *softbuffer, uint16_t rnti, uint8_t *data,
                                                uint32_t codeword_idx) {
   srslte_ra_nbits_t *nbits = &cfg->nbits[codeword_idx];
@@ -504,38 +558,28 @@ static int srslte_pdsch_codeword_encode(srslte_pdsch_t *pdsch, srslte_pdsch_cfg_
          nbits->nof_re, nbits->nof_bits, rv);
 
     /* Channel coding */
-    if (srslte_dlsch_encode2(&pdsch->dl_sch, cfg, softbuffer, data, pdsch->e[codeword_idx], codeword_idx)) {
+    if (srslte_dlsch_encode2(&q->dl_sch, cfg, softbuffer, data, q->e[codeword_idx], codeword_idx)) {
       ERROR("Error encoding TB %d", codeword_idx);
       return SRSLTE_ERROR;
     }
 
-    /* Bit scrambling */
-    if (!pdsch->users[rnti]) {
-      srslte_sequence_t seq;
-
-      if (srslte_sequence_pdsch(&seq, rnti, codeword_idx, 2 * cfg->sf_idx, pdsch->cell.id, nbits->nof_bits)) {
-        ERROR("Initialising scrambling sequence");
-        return SRSLTE_ERROR;
-      }
-      srslte_scrambling_bytes(&seq, (uint8_t *) pdsch->e[codeword_idx], nbits->nof_bits);
-      srslte_sequence_free(&seq);
+    /* Select scrambling sequence */
+    srslte_sequence_t *seq = get_user_sequence(q, rnti, codeword_idx, cfg->sf_idx, nbits->nof_bits);
 
-    } else {
-      srslte_scrambling_bytes(&pdsch->users[rnti]->seq[codeword_idx][cfg->sf_idx],
-                              (uint8_t *) pdsch->e[codeword_idx],
-                              nbits->nof_bits);
-    }
+    /* Bit scrambling */
+    srslte_scrambling_bytes(seq, (uint8_t *) q->e[codeword_idx], nbits->nof_bits);
 
     /* Bit mapping */
-    srslte_mod_modulate_bytes(&pdsch->mod[mcs->mod],
-                              (uint8_t *) pdsch->e[codeword_idx],
-                              pdsch->d[codeword_idx], nbits->nof_bits);
+    srslte_mod_modulate_bytes(&q->mod[mcs->mod],
+                              (uint8_t *) q->e[codeword_idx],
+                              q->d[codeword_idx], nbits->nof_bits);
+
   }
 
   return SRSLTE_SUCCESS;
 }
 
-static int srslte_pdsch_codeword_decode(srslte_pdsch_t *pdsch, srslte_pdsch_cfg_t *cfg,
+static int srslte_pdsch_codeword_decode(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg,
                                                srslte_softbuffer_rx_t *softbuffer, uint16_t rnti, uint8_t *data,
                                                uint32_t codeword_idx, bool *ack) {
   srslte_ra_nbits_t *nbits = &cfg->nbits[codeword_idx];
@@ -552,24 +596,16 @@ static int srslte_pdsch_codeword_decode(srslte_pdsch_t *pdsch, srslte_pdsch_cfg_
      * The MAX-log-MAP algorithm used in turbo decoding is unsensitive to SNR estimation,
      * thus we don't need tot set it in the LLRs normalization
      */
-    srslte_demod_soft_demodulate_s(mcs->mod, pdsch->d[codeword_idx], pdsch->e[codeword_idx], nbits->nof_re);
+    srslte_demod_soft_demodulate_s(mcs->mod, q->d[codeword_idx], q->e[codeword_idx], nbits->nof_re);
 
-    if (pdsch->users[rnti] && pdsch->users[rnti]->sequence_generated) {
-      srslte_scrambling_s_offset(&pdsch->users[rnti]->seq[codeword_idx][cfg->sf_idx], pdsch->e[codeword_idx],
-                                 0, nbits->nof_bits);
-    } else {
-      srslte_sequence_t seq;
-      if (srslte_sequence_pdsch(&seq, rnti, codeword_idx, 2 * cfg->sf_idx, pdsch->cell.id, nbits->nof_bits)) {
-        ERROR("Initialising scrambling sequence");
-        return SRSLTE_ERROR;
-      }
-      srslte_scrambling_s_offset(&seq, pdsch->e[codeword_idx], 0, nbits->nof_bits);
-      srslte_sequence_free(&seq);
-    }
+    /* Select scrambling sequence */
+    srslte_sequence_t *seq = get_user_sequence(q, rnti, codeword_idx, cfg->sf_idx, nbits->nof_bits);
 
-    /* Return  */
-    ret = srslte_dlsch_decode2(&pdsch->dl_sch, cfg, softbuffer, pdsch->e[codeword_idx], data, codeword_idx);
+    /* Bit scrambling */
+    srslte_scrambling_s_offset(seq, q->e[codeword_idx], 0, nbits->nof_bits);
 
+    /* Return  */
+    ret = srslte_dlsch_decode2(&q->dl_sch, cfg, softbuffer, q->e[codeword_idx], data, codeword_idx);
     if (ret == SRSLTE_SUCCESS) {
       *ack = true;
     } else if (ret == SRSLTE_ERROR) {
@@ -666,7 +702,6 @@ int srslte_pdsch_decode(srslte_pdsch_t *q,
     pdsch_decode_debug(q, cfg, sf_symbols, ce);
 
     return SRSLTE_SUCCESS;
-
   } else {
     return SRSLTE_ERROR_INVALID_INPUTS;
   }

lib/src/phy/phch/phich.c

@@ -32,6 +32,7 @@
 #include <stdbool.h>
 #include <assert.h>
 #include <math.h>
+#include <srslte/phy/common/phy_common.h>
 
 #include "srslte/phy/phch/regs.h"
 #include "srslte/phy/phch/phich.h"
@@ -67,37 +68,22 @@ void srslte_phich_reset(srslte_phich_t *q, cf_t *slot_symbols[SRSLTE_MAX_PORTS])
   }
 }
 
-int srslte_phich_init(srslte_phich_t *q, srslte_regs_t *regs, srslte_cell_t cell) 
-{
-  return srslte_phich_init_multi(q, regs, cell, 1);
-}
-
 /** Initializes the phich channel receiver */
-int srslte_phich_init_multi(srslte_phich_t *q, srslte_regs_t *regs, srslte_cell_t cell, uint32_t nof_rx_antennas) 
+int srslte_phich_init(srslte_phich_t *q, uint32_t nof_rx_antennas)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
   
-  if (q         != NULL &&
-      regs      != NULL &&
-      srslte_cell_isvalid(&cell)) 
+  if (q != NULL)
   {
 
     bzero(q, sizeof(srslte_phich_t));
     ret = SRSLTE_ERROR;
     
-    q->cell = cell;
-    q->regs = regs;
-    q->nof_rx_antennas = nof_rx_antennas; 
+    q->nof_rx_antennas = nof_rx_antennas;
     
     if (srslte_modem_table_lte(&q->mod, SRSLTE_MOD_BPSK)) {
       goto clean;
     }
-
-    for (int nsf = 0; nsf < SRSLTE_NSUBFRAMES_X_FRAME; nsf++) {
-      if (srslte_sequence_phich(&q->seq[nsf], 2 * nsf, q->cell.id)) {
-        goto clean;
-      }
-    }
     ret = SRSLTE_SUCCESS;
   }
   clean: 
@@ -114,9 +100,34 @@ void srslte_phich_free(srslte_phich_t *q) {
   srslte_modem_table_free(&q->mod);
 
   bzero(q, sizeof(srslte_phich_t));
+}
+
+int srslte_phich_set_cell(srslte_phich_t *q, srslte_regs_t *regs, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
+  if (q         != NULL &&
+      regs      != NULL &&
+      srslte_cell_isvalid(&cell))
+  {
+
+    q->regs = regs;
+
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      for (int nsf = 0; nsf < SRSLTE_NSUBFRAMES_X_FRAME; nsf++) {
+        if (srslte_sequence_phich(&q->seq[nsf], 2 * nsf, q->cell.id)) {
+          return SRSLTE_ERROR;
+        }
+      }
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
 }
 
+
+
 /* Computes n_group and n_seq according to Section 9.1.2 in 36.213 */
 void srslte_phich_calc(srslte_phich_t *q, uint32_t n_prb_lowest, uint32_t n_dmrs, 
                        uint32_t *ngroup, uint32_t *nseq) 

lib/src/phy/phch/prach.c

@@ -26,6 +26,7 @@
 
 #include <math.h>
 #include <string.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/common/phy_common.h"
 #include "srslte/phy/phch/prach.h"
@@ -61,6 +62,8 @@ uint32_t prach_Tseq[5] = {24576, 24576, 2*24576, 2*24576, 4096};
 // Table 5.7.2-2 - N_cs values for unrestricted sets
 uint32_t prach_Ncs_unrestricted[16] = {0,13,15,18,22,26,32,38,46,59,76,93,119,167,279,419};
 
+#define MAX_N_zc 839
+
 // Table 5.7.2-2 - N_cs values for restricted sets
 uint32_t prach_Ncs_restricted[15] = {15,18,22,26,32,38,46,55,68,82,100,128,158,202,237};
 
@@ -328,7 +331,10 @@ int srslte_prach_gen_seqs(srslte_prach_t *p)
 
 int srslte_prach_init_cfg(srslte_prach_t *p, srslte_prach_cfg_t *cfg, uint32_t nof_prb)
 {
-  return srslte_prach_init(p, 
+  if (srslte_prach_init(p, srslte_symbol_sz(nof_prb))) {
+    return -1;
+  }
+  return srslte_prach_set_cell(p,
                            srslte_symbol_sz(nof_prb), 
                            cfg->config_idx, 
                            cfg->root_seq_idx,
@@ -336,28 +342,95 @@ int srslte_prach_init_cfg(srslte_prach_t *p, srslte_prach_cfg_t *cfg, uint32_t n
                            cfg->zero_corr_zone);
 }
 
-int srslte_prach_init(srslte_prach_t *p,
-               uint32_t N_ifft_ul,
-               uint32_t config_idx,
-               uint32_t root_seq_index,
-               bool high_speed_flag,
-               uint32_t zero_corr_zone_config)
+int srslte_prach_init(srslte_prach_t *p, uint32_t max_N_ifft_ul)
+{
+  int ret = SRSLTE_ERROR;
+  if(p                      != NULL      &&
+     max_N_ifft_ul          <  2049)
+  {
+    bzero(p, sizeof(srslte_prach_t));
+
+    p->max_N_ifft_ul = max_N_ifft_ul;
+
+    // Set up containers
+    p->prach_bins = srslte_vec_malloc(sizeof(cf_t)*MAX_N_zc);
+    p->corr_spec = srslte_vec_malloc(sizeof(cf_t)*MAX_N_zc);
+    p->corr = srslte_vec_malloc(sizeof(float)*MAX_N_zc);
+
+    // Set up ZC FFTS
+    if(srslte_dft_plan(&p->zc_fft, MAX_N_zc, SRSLTE_DFT_FORWARD, SRSLTE_DFT_COMPLEX)){
+      return SRSLTE_ERROR;
+    }
+    srslte_dft_plan_set_mirror(&p->zc_fft, false);
+    srslte_dft_plan_set_norm(&p->zc_fft, true);
+
+    if(srslte_dft_plan(&p->zc_ifft, MAX_N_zc, SRSLTE_DFT_BACKWARD, SRSLTE_DFT_COMPLEX)){
+      return SRSLTE_ERROR;
+    }
+    srslte_dft_plan_set_mirror(&p->zc_ifft, false);
+    srslte_dft_plan_set_norm(&p->zc_ifft, false);
+
+    uint32_t fft_size_alloc = max_N_ifft_ul * DELTA_F/DELTA_F_RA;
+
+    p->ifft_in = (cf_t*)srslte_vec_malloc(fft_size_alloc*sizeof(cf_t));
+    p->ifft_out = (cf_t*)srslte_vec_malloc(fft_size_alloc*sizeof(cf_t));
+    if(srslte_dft_plan(&p->ifft, fft_size_alloc, SRSLTE_DFT_BACKWARD, SRSLTE_DFT_COMPLEX)) {
+      fprintf(stderr, "Error creating DFT plan\n");
+      return -1;
+    }
+    srslte_dft_plan_set_mirror(&p->ifft, true);
+    srslte_dft_plan_set_norm(&p->ifft, true);
+
+    if(srslte_dft_plan(&p->fft, fft_size_alloc, SRSLTE_DFT_FORWARD, SRSLTE_DFT_COMPLEX)){
+      fprintf(stderr, "Error creating DFT plan\n");
+      return -1;
+    }
+    
+    p->signal_fft = srslte_vec_malloc(sizeof(cf_t)*fft_size_alloc);
+    if (!p->signal_fft) {
+      fprintf(stderr, "Error allocating memory\n");
+      return -1; 
+    }
+    
+    srslte_dft_plan_set_mirror(&p->fft, true);
+    srslte_dft_plan_set_norm(&p->fft, false);
+
+    ret = SRSLTE_SUCCESS;
+  } else {
+    fprintf(stderr, "Invalid parameters\n");
+  }
+
+  return ret;
+}
+
+
+int srslte_prach_set_cell(srslte_prach_t *p,
+                      uint32_t N_ifft_ul,
+                      uint32_t config_idx,
+                      uint32_t root_seq_index,
+                      bool high_speed_flag,
+                      uint32_t zero_corr_zone_config)
 {
   int ret = SRSLTE_ERROR;
   if(p                      != NULL      &&
      N_ifft_ul              <  2049      &&
-     config_idx             <  64        && 
+     config_idx             <  64        &&
      root_seq_index         <  MAX_ROOTS)
   {
+    if (N_ifft_ul > p->max_N_ifft_ul) {
+      fprintf(stderr, "PRACH: Error in set_cell(): N_ifft_ul must be lower or equal max_N_ifft_ul in init()\n");
+      return -1;
+    }
+
     uint32_t preamble_format = srslte_prach_get_preamble_format(config_idx);
-    p->config_idx = config_idx; 
+    p->config_idx = config_idx;
     p->f = preamble_format;
     p->rsi = root_seq_index;
     p->hs = high_speed_flag;
     p->zczc = zero_corr_zone_config;
-    p->detect_factor = PRACH_DETECT_FACTOR; 
-    
-    
+    p->detect_factor = PRACH_DETECT_FACTOR;
+
+
     // Determine N_zc and N_cs
     if(4 == preamble_format){
       if (p->zczc < 7) {
@@ -368,43 +441,33 @@ int srslte_prach_init(srslte_prach_t *p,
         return SRSLTE_ERROR;
       }
     }else{
-      p->N_zc = 839;
+      p->N_zc = MAX_N_zc;
       if(p->hs){
         if (p->zczc < 15) {
           p->N_cs = prach_Ncs_restricted[p->zczc];
         } else {
           fprintf(stderr, "Invalid zeroCorrelationZoneConfig=%d for restricted set\n", p->zczc);
           return SRSLTE_ERROR;
-        }   
+        }
       }else{
         if (p->zczc < 16) {
           p->N_cs = prach_Ncs_unrestricted[p->zczc];
         } else {
           fprintf(stderr, "Invalid zeroCorrelationZoneConfig=%d\n", p->zczc);
           return SRSLTE_ERROR;
-        }   
+        }
       }
     }
-    
-    // Set up containers
-    p->prach_bins = srslte_vec_malloc(sizeof(cf_t)*p->N_zc);
-    p->corr_spec = srslte_vec_malloc(sizeof(cf_t)*p->N_zc);
-    p->corr = srslte_vec_malloc(sizeof(float)*p->N_zc);
 
     // Set up ZC FFTS
-    p->zc_fft = (srslte_dft_plan_t*)srslte_vec_malloc(sizeof(srslte_dft_plan_t));
-    if(srslte_dft_plan(p->zc_fft, p->N_zc, SRSLTE_DFT_FORWARD, SRSLTE_DFT_COMPLEX)){
-      return SRSLTE_ERROR;
-    }
-    srslte_dft_plan_set_mirror(p->zc_fft, false);
-    srslte_dft_plan_set_norm(p->zc_fft, true);
-
-    p->zc_ifft = (srslte_dft_plan_t*)srslte_vec_malloc(sizeof(srslte_dft_plan_t));
-    if(srslte_dft_plan(p->zc_ifft, p->N_zc, SRSLTE_DFT_BACKWARD, SRSLTE_DFT_COMPLEX)){
-      return SRSLTE_ERROR;
+    if (p->N_zc != MAX_N_zc) {
+      if(srslte_dft_replan(&p->zc_fft, p->N_zc)){
+        return SRSLTE_ERROR;
+      }
+      if(srslte_dft_replan(&p->zc_ifft, p->N_zc)){
+        return SRSLTE_ERROR;
+      }
     }
-    srslte_dft_plan_set_mirror(p->zc_ifft, false);
-    srslte_dft_plan_set_norm(p->zc_ifft, false);
 
     // Generate our 64 sequences
     p->N_roots = 0;
@@ -412,9 +475,9 @@ int srslte_prach_init(srslte_prach_t *p,
 
     // Generate sequence FFTs
     for(int i=0;i<N_SEQS;i++){
-      srslte_dft_run(p->zc_fft, p->seqs[i], p->dft_seqs[i]);
+      srslte_dft_run(&p->zc_fft, p->seqs[i], p->dft_seqs[i]);
     }
-    
+
     // Create our FFT objects and buffers
     p->N_ifft_ul = N_ifft_ul;
     if(4 == preamble_format){
@@ -422,47 +485,31 @@ int srslte_prach_init(srslte_prach_t *p,
     }else{
       p->N_ifft_prach = p->N_ifft_ul * DELTA_F/DELTA_F_RA;
     }
-    
+
     /* The deadzone specifies the number of samples at the end of the correlation window
      * that will be considered as belonging to the next preamble
      */
-    p->deadzone = 0; 
+    p->deadzone = 0;
     /*
     if(p->N_cs != 0) {
       float samp_rate=15000*p->N_ifft_ul;
       p->deadzone = (uint32_t) ceil((float) samp_rate/((float) p->N_zc*subcarrier_spacing));
     }*/
 
-    p->ifft_in = (cf_t*)srslte_vec_malloc(p->N_ifft_prach*sizeof(cf_t));
-    p->ifft_out = (cf_t*)srslte_vec_malloc(p->N_ifft_prach*sizeof(cf_t));
-    p->ifft = (srslte_dft_plan_t*)srslte_vec_malloc(sizeof(srslte_dft_plan_t));
-    if(srslte_dft_plan(p->ifft, p->N_ifft_prach, SRSLTE_DFT_BACKWARD, SRSLTE_DFT_COMPLEX)) {
+    if(srslte_dft_replan(&p->ifft, p->N_ifft_prach)) {
       fprintf(stderr, "Error creating DFT plan\n");
       return -1;
     }
-    srslte_dft_plan_set_mirror(p->ifft, true);
-    srslte_dft_plan_set_norm(p->ifft, true);
-
-    p->fft = (srslte_dft_plan_t*)srslte_vec_malloc(sizeof(srslte_dft_plan_t));
-    if(srslte_dft_plan(p->fft, p->N_ifft_prach, SRSLTE_DFT_FORWARD, SRSLTE_DFT_COMPLEX)){
+    if(srslte_dft_replan(&p->fft, p->N_ifft_prach)){
       fprintf(stderr, "Error creating DFT plan\n");
       return -1;
     }
-    
-    p->signal_fft = srslte_vec_malloc(sizeof(cf_t)*p->N_ifft_prach);
-    if (!p->signal_fft) {
-      fprintf(stderr, "Error allocating memory\n");
-      return -1; 
-    }
-    
-    srslte_dft_plan_set_mirror(p->fft, true);
-    srslte_dft_plan_set_norm(p->fft, false);
 
     p->N_seq = prach_Tseq[p->f]*p->N_ifft_ul/2048;
     p->N_cp  = prach_Tcp[p->f]*p->N_ifft_ul/2048;
     p->T_seq = prach_Tseq[p->f]*SRSLTE_LTE_TS;
     p->T_tot = (prach_Tseq[p->f]+prach_Tcp[p->f])*SRSLTE_LTE_TS;
-    
+
     ret = SRSLTE_SUCCESS;
   } else {
     fprintf(stderr, "Invalid parameters\n");
@@ -500,7 +547,7 @@ int srslte_prach_gen(srslte_prach_t *p,
     memcpy(&p->ifft_in[begin], p->dft_seqs[seq_index], p->N_zc * sizeof(cf_t));
     memset(&p->ifft_in[begin+p->N_zc], 0, (p->N_ifft_prach - begin - p->N_zc) * sizeof(cf_t));
 
-    srslte_dft_run(p->ifft, p->ifft_in, p->ifft_out);
+    srslte_dft_run(&p->ifft, p->ifft_in, p->ifft_out);
 
     // Copy CP into buffer
     memcpy(signal, &p->ifft_out[p->N_ifft_prach-p->N_cp], p->N_cp*sizeof(cf_t));
@@ -552,7 +599,7 @@ int srslte_prach_detect_offset(srslte_prach_t *p,
     }
     
     // FFT incoming signal
-    srslte_dft_run(p->fft, signal, p->signal_fft);
+    srslte_dft_run(&p->fft, signal, p->signal_fft);
 
     *n_indices = 0;
 
@@ -569,7 +616,7 @@ int srslte_prach_detect_offset(srslte_prach_t *p,
      
       srslte_vec_prod_conj_ccc(p->prach_bins, root_spec, p->corr_spec, p->N_zc);
 
-      srslte_dft_run(p->zc_ifft, p->corr_spec, p->corr_spec);
+      srslte_dft_run(&p->zc_ifft, p->corr_spec, p->corr_spec);
       
       srslte_vec_abs_square_cf(p->corr_spec, p->corr, p->N_zc);
 
@@ -632,16 +679,12 @@ int srslte_prach_free(srslte_prach_t *p) {
   free(p->prach_bins);
   free(p->corr_spec);
   free(p->corr);
-  srslte_dft_plan_free(p->ifft);
-  free(p->ifft);
+  srslte_dft_plan_free(&p->ifft);
   free(p->ifft_in);
   free(p->ifft_out);
-  srslte_dft_plan_free(p->fft);
-  free(p->fft);
-  srslte_dft_plan_free(p->zc_fft);
-  free(p->zc_fft);
-  srslte_dft_plan_free(p->zc_ifft);
-  free(p->zc_ifft);
+  srslte_dft_plan_free(&p->fft);
+  srslte_dft_plan_free(&p->zc_fft);
+  srslte_dft_plan_free(&p->zc_ifft);
 
   if (p->signal_fft) {
     free(p->signal_fft); 

lib/src/phy/phch/pucch.c

@@ -416,37 +416,24 @@ void srslte_pucch_set_threshold(srslte_pucch_t *q, float format1_threshold) {
 }
 
 /** Initializes the PDCCH transmitter and receiver */
-int srslte_pucch_init(srslte_pucch_t *q, srslte_cell_t cell) {
+int srslte_pucch_init(srslte_pucch_t *q) {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
-  if (q != NULL && srslte_cell_isvalid(&cell)) {
+  if (q != NULL) {
     ret = SRSLTE_ERROR;
     bzero(q, sizeof(srslte_pucch_t));
     
-    q->cell = cell; 
-    
-    srslte_pucch_cfg_default(&q->pucch_cfg);
-    
     if (srslte_modem_table_lte(&q->mod, SRSLTE_MOD_QPSK)) {
       return SRSLTE_ERROR;
     }
-    
-    // Precompute group hopping values u. 
-    if (srslte_group_hopping_f_gh(q->f_gh, q->cell.id)) {
-      return SRSLTE_ERROR;
-    }
-    
-    if (srslte_pucch_n_cs_cell(q->cell, q->n_cs_cell)) {
-      return SRSLTE_ERROR;
-    }
-    
+
     q->users = calloc(sizeof(srslte_pucch_user_t*), 1+SRSLTE_SIRNTI);
     if (!q->users) {
       perror("malloc");
-      return SRSLTE_ERROR;
+      goto clean_exit;
     }
     
     srslte_uci_cqi_pucch_init(&q->cqi);
-    
+
     q->z = srslte_vec_malloc(sizeof(cf_t)*SRSLTE_PUCCH_MAX_SYMBOLS);
     q->z_tmp = srslte_vec_malloc(sizeof(cf_t)*SRSLTE_PUCCH_MAX_SYMBOLS);
     q->ce = srslte_vec_malloc(sizeof(cf_t)*SRSLTE_PUCCH_MAX_SYMBOLS);
@@ -455,12 +442,16 @@ int srslte_pucch_init(srslte_pucch_t *q, srslte_cell_t cell) {
 
     ret = SRSLTE_SUCCESS;
   }
+clean_exit:
+  if (ret == SRSLTE_ERROR) {
+    srslte_pucch_free(q);
+  }
   return ret;
 }
 
 void srslte_pucch_free(srslte_pucch_t *q) {
   if (q->users) {
-    for (int rnti=0;rnti<SRSLTE_SIRNTI;rnti++) {      
+    for (int rnti=0;rnti<=SRSLTE_SIRNTI;rnti++) {
       srslte_pucch_clear_rnti(q, rnti);
     }
     free(q->users);
@@ -480,6 +471,31 @@ void srslte_pucch_free(srslte_pucch_t *q) {
   bzero(q, sizeof(srslte_pucch_t));
 }
 
+int srslte_pucch_set_cell(srslte_pucch_t *q, srslte_cell_t cell) {
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+  if (q != NULL && srslte_cell_isvalid(&cell)) {
+
+    srslte_pucch_cfg_default(&q->pucch_cfg);
+
+    if (cell.id != q->cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+
+      // Precompute group hopping values u.
+      if (srslte_group_hopping_f_gh(q->f_gh, q->cell.id)) {
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pucch_n_cs_cell(q->cell, q->n_cs_cell)) {
+        return SRSLTE_ERROR;
+      }
+    }
+
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
+
 void srslte_pucch_clear_rnti(srslte_pucch_t *q, uint16_t rnti) {
   if (q->users[rnti]) {
     for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
@@ -498,6 +514,7 @@ int srslte_pucch_set_crnti(srslte_pucch_t *q, uint16_t rnti) {
         // Precompute scrambling sequence for pucch format 2    
         if (srslte_sequence_pucch(&q->users[rnti]->seq_f2[sf_idx], rnti, 2*sf_idx, q->cell.id)) {
           fprintf(stderr, "Error computing PUCCH Format 2 scrambling sequence\n");
+          srslte_pucch_clear_rnti(q, rnti);
           return SRSLTE_ERROR; 
         }        
       }

lib/src/phy/phch/pusch.c

@@ -32,6 +32,8 @@
 #include <stdbool.h>
 #include <assert.h>
 #include <math.h>
+#include <srslte/srslte.h>
+#include <srslte/phy/phch/pusch.h>
 
 #include "srslte/phy/ch_estimation/refsignal_ul.h"
 #include "srslte/phy/phch/pusch.h"
@@ -185,22 +187,18 @@ int pusch_get(srslte_pusch_t *q, srslte_ra_ul_grant_t *grant, cf_t *input, cf_t
 
 
 /** Initializes the PDCCH transmitter and receiver */
-int srslte_pusch_init(srslte_pusch_t *q, srslte_cell_t cell) {
+int pusch_init(srslte_pusch_t *q, uint32_t max_prb, bool is_ue) {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
   int i;
 
- if (q                         != NULL                  &&
-     srslte_cell_isvalid(&cell)) 
+ if (q != NULL)
   {   
     
     bzero(q, sizeof(srslte_pusch_t));
     ret = SRSLTE_ERROR;
-    
-    q->cell = cell;
-    q->max_re = q->cell.nof_prb * MAX_PUSCH_RE(q->cell.cp);
+    q->max_re = max_prb * MAX_PUSCH_RE(SRSLTE_CP_NORM);
 
-    INFO("Init PUSCH: %d ports %d PRBs, max_symbols: %d\n", q->cell.nof_ports,
-        q->cell.nof_prb, q->max_re);
+    INFO("Init PUSCH: %d PRBs\n", max_prb);
 
     for (i = 0; i < 4; i++) {
       if (srslte_modem_table_lte(&q->mod[i], modulations[i])) {
@@ -208,26 +206,26 @@ int srslte_pusch_init(srslte_pusch_t *q, srslte_cell_t cell) {
       }
       srslte_modem_table_bytes(&q->mod[i]);
     }
-    
-    q->users = calloc(sizeof(srslte_pusch_user_t*), 1+SRSLTE_SIRNTI);
+
+    q->is_ue = is_ue;
+
+    q->users = calloc(sizeof(srslte_pusch_user_t*), q->is_ue?1:(1+SRSLTE_SIRNTI));
     if (!q->users) {
       perror("malloc");
       goto clean;
     }
 
-    /* Precompute sequence for type2 frequency hopping */
-    if (srslte_sequence_LTE_pr(&q->seq_type2_fo, 210, q->cell.id)) {
-      fprintf(stderr, "Error initiating type2 frequency hopping sequence\n");
-      goto clean; 
+    if (srslte_sequence_init(&q->tmp_seq, q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM))) {
+      goto clean;
     }
 
     srslte_sch_init(&q->ul_sch);
-    
-    if (srslte_dft_precoding_init(&q->dft_precoding, cell.nof_prb)) {
+
+    if (srslte_dft_precoding_init(&q->dft_precoding, max_prb, is_ue)) {
       fprintf(stderr, "Error initiating DFT transform precoding\n");
       goto clean; 
     }
-    
+
     // Allocate int16 for reception (LLRs). Buffer casted to uint8_t for transmission
     q->q = srslte_vec_malloc(sizeof(int16_t) * q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM));
     if (!q->q) {
@@ -244,9 +242,11 @@ int srslte_pusch_init(srslte_pusch_t *q, srslte_cell_t cell) {
       goto clean; 
     }
 
-    q->ce = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
-    if (!q->ce) {
-      goto clean;
+    if (!q->is_ue) {
+      q->ce = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
+      if (!q->ce) {
+        goto clean;
+      }
     }
     q->z = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
     if (!q->z) {
@@ -262,6 +262,14 @@ int srslte_pusch_init(srslte_pusch_t *q, srslte_cell_t cell) {
   return ret;
 }
 
+int srslte_pusch_init_ue(srslte_pusch_t *q, uint32_t max_prb) {
+  return pusch_init(q, max_prb, true);
+}
+
+int srslte_pusch_init_enb(srslte_pusch_t *q, uint32_t max_prb) {
+  return pusch_init(q, max_prb, false);
+}
+
 void srslte_pusch_free(srslte_pusch_t *q) {
   int i;
 
@@ -284,13 +292,20 @@ void srslte_pusch_free(srslte_pusch_t *q) {
   srslte_dft_precoding_free(&q->dft_precoding);
 
   if (q->users) {
-    for (int rnti=0;rnti<SRSLTE_SIRNTI;rnti++) {      
-      srslte_pusch_clear_rnti(q, rnti);
+    if (q->is_ue) {
+      srslte_pusch_free_rnti(q, 0);
+    } else {
+      for (int rnti=0;rnti<=SRSLTE_SIRNTI;rnti++) {
+        srslte_pusch_free_rnti(q, rnti);
+      }
     }
     free(q->users);
   }
+
   srslte_sequence_free(&q->seq_type2_fo);
   
+  srslte_sequence_free(&q->tmp_seq);
+  
   for (i = 0; i < 4; i++) {
     srslte_modem_table_free(&q->mod[i]);
   }
@@ -300,6 +315,33 @@ void srslte_pusch_free(srslte_pusch_t *q) {
 
 }
 
+int srslte_pusch_set_cell(srslte_pusch_t *q, srslte_cell_t cell) {
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q != NULL && srslte_cell_isvalid(&cell))
+  {
+
+    q->max_re = cell.nof_prb * MAX_PUSCH_RE(q->cell.cp);
+
+    INFO("PUSCH: Cell config PCI=5d, %d ports %d PRBs, max_symbols: %d\n",
+         q->cell.id, q->cell.nof_ports, q->cell.nof_prb, q->max_re);
+
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      /* Precompute sequence for type2 frequency hopping */
+      if (srslte_sequence_LTE_pr(&q->seq_type2_fo, 210, q->cell.id)) {
+        fprintf(stderr, "Error initiating type2 frequency hopping sequence\n");
+        return SRSLTE_ERROR;
+      }
+
+    }
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
+
+
 /* Configures the structure srslte_pusch_cfg_t from the UL DCI allocation dci_msg. 
  * If dci_msg is NULL, the grant is assumed to be already stored in cfg->grant
  */
@@ -391,29 +433,63 @@ int srslte_pusch_cfg(srslte_pusch_t             *q,
  * For the connection procedure, use srslte_pusch_encode() functions */
 int srslte_pusch_set_rnti(srslte_pusch_t *q, uint16_t rnti) {
   uint32_t i;
-  
-  if (!q->users[rnti]) {
-    q->users[rnti] = calloc(1, sizeof(srslte_pusch_user_t));
-    if (q->users[rnti]) {
-      for (i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
-        if (srslte_sequence_pusch(&q->users[rnti]->seq[i], rnti, 2 * i, q->cell.id,
-            q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM))) {
-          return SRSLTE_ERROR; 
-        }
+
+  uint32_t rnti_idx = q->is_ue?0:rnti;
+
+  if (!q->users[rnti_idx] || q->is_ue) {
+    if (!q->users[rnti_idx]) {
+      q->users[rnti_idx] = calloc(1, sizeof(srslte_pusch_user_t));
+      if (!q->users[rnti_idx]) {
+        perror("calloc");
+        return -1;
       }
-      q->users[rnti]->sequences_generated = true;
     }
+    for (i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
+      if (srslte_sequence_pusch(&q->users[rnti_idx]->seq[i], rnti, 2 * i, q->cell.id,
+                                q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM)))
+      {
+        fprintf(stderr, "Error initializing PUSCH scrambling sequence\n");
+        srslte_pusch_free_rnti(q, rnti);
+        return SRSLTE_ERROR;
+      }
+    }
+    q->ue_rnti = rnti;
+    q->users[rnti_idx]->cell_id = q->cell.id;
+    q->users[rnti_idx]->sequence_generated = true;
+  } else {
+    fprintf(stderr, "Error generating PUSCH sequence: rnti=0x%x already generated\n", rnti);
   }
   return SRSLTE_SUCCESS;
 }
 
-void srslte_pusch_clear_rnti(srslte_pusch_t *q, uint16_t rnti) {
-  if (q->users[rnti]) {
+void srslte_pusch_free_rnti(srslte_pusch_t *q, uint16_t rnti) {
+
+  uint32_t rnti_idx = q->is_ue?0:rnti;
+
+  if (q->users[rnti_idx]) {
     for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
-      srslte_sequence_free(&q->users[rnti]->seq[i]);
+      srslte_sequence_free(&q->users[rnti_idx]->seq[i]);
     }    
-    free(q->users[rnti]);
-    q->users[rnti] = NULL; 
+    free(q->users[rnti_idx]);
+    q->users[rnti_idx] = NULL;
+    q->ue_rnti = 0;
+  }
+}
+
+static srslte_sequence_t *get_user_sequence(srslte_pusch_t *q, uint16_t rnti, uint32_t sf_idx, uint32_t len)
+{
+  uint32_t rnti_idx = q->is_ue?0:rnti;
+
+  // The scrambling sequence is pregenerated for all RNTIs in the eNodeB but only for C-RNTI in the UE
+  if (q->users[rnti_idx] && q->users[rnti_idx]->sequence_generated &&
+      q->users[rnti_idx]->cell_id == q->cell.id                    &&
+      q->ue_rnti == rnti                                           &&
+      ((rnti >= SRSLTE_CRNTI_START && rnti < SRSLTE_CRNTI_END) || !q->is_ue))
+  {
+    return &q->users[rnti_idx]->seq[sf_idx];
+  } else {
+    srslte_sequence_pusch(&q->tmp_seq, rnti, 2 * sf_idx, q->cell.id, len);
+    return &q->tmp_seq;
   }
 }
 
@@ -445,18 +521,13 @@ int srslte_pusch_encode(srslte_pusch_t *q, srslte_pusch_cfg_t *cfg, srslte_softb
       return SRSLTE_ERROR;
     }
 
-    if (q->users[rnti] && q->users[rnti]->sequences_generated) {
-      srslte_scrambling_bytes(&q->users[rnti]->seq[cfg->sf_idx], (uint8_t*) q->q, cfg->nbits.nof_bits);
-    } else {
-      srslte_sequence_t seq;
-      if (srslte_sequence_pusch(&seq, rnti, 2 * cfg->sf_idx, q->cell.id, cfg->nbits.nof_bits)) {
-        return SRSLTE_ERROR;
-      }
-      srslte_scrambling_bytes(&seq, (uint8_t*) q->q, cfg->nbits.nof_bits);
-      srslte_sequence_free(&seq);
-    }
-    
-    // Correct UCI placeholder/repetition bits    
+    // Generate scrambling sequence if not pre-generated
+    srslte_sequence_t *seq = get_user_sequence(q, rnti, cfg->sf_idx, cfg->nbits.nof_bits);
+
+    // Run scrambling
+    srslte_scrambling_bytes(seq, (uint8_t*) q->q, cfg->nbits.nof_bits);
+
+    // Correct UCI placeholder/repetition bits
     uint8_t *d = q->q; 
     for (int i = 0; i < q->ul_sch.nof_ri_ack_bits; i++) {     
       if (q->ul_sch.ack_ri_bits[i].type == UCI_BIT_PLACEHOLDER) {
@@ -528,24 +599,15 @@ int srslte_pusch_decode(srslte_pusch_t *q,
     srslte_predecoding_single(q->d, q->ce, q->z, cfg->nbits.nof_re, noise_estimate);
     
     // DFT predecoding
-    srslte_dft_predecoding(&q->dft_precoding, q->z, q->d, cfg->grant.L_prb, cfg->nbits.nof_symb);
+    srslte_dft_precoding(&q->dft_precoding, q->z, q->d, cfg->grant.L_prb, cfg->nbits.nof_symb);
     
     // Soft demodulation
     srslte_demod_soft_demodulate_s(cfg->grant.mcs.mod, q->d, q->q, cfg->nbits.nof_re);
 
-    srslte_sequence_t *seq = NULL;
+    // Generate scrambling sequence if not pre-generated
+    srslte_sequence_t *seq = get_user_sequence(q, rnti, cfg->sf_idx, cfg->nbits.nof_bits);
 
-    // Create sequence if does not exist
-    if (q->users[rnti] && q->users[rnti]->sequences_generated) {
-      seq = &q->users[rnti]->seq[cfg->sf_idx];
-    } else {
-      seq = &q->tmp_seq;
-      if (srslte_sequence_pusch(seq, rnti, 2 * cfg->sf_idx, q->cell.id, cfg->nbits.nof_bits)) {
-        return SRSLTE_ERROR;
-      }
-    }
-    
-    // Decode RI/HARQ bits before descrambling 
+    // Decode RI/HARQ bits before descrambling
     if (srslte_ulsch_uci_decode_ri_ack(&q->ul_sch, cfg, softbuffer, q->q, seq->c, uci_data)) {
       fprintf(stderr, "Error decoding RI/HARQ bits\n");
       return SRSLTE_ERROR; 
@@ -554,11 +616,7 @@ int srslte_pusch_decode(srslte_pusch_t *q,
     // Descrambling
     srslte_scrambling_s_offset(seq, q->q, 0, cfg->nbits.nof_bits);
         
-    if (!(q->users[rnti] && q->users[rnti]->sequences_generated)) {
-      srslte_sequence_free(seq);
-    }
-    
-    return srslte_ulsch_uci_decode(&q->ul_sch, cfg, softbuffer, q->q, q->g, data, uci_data);      
+    return srslte_ulsch_uci_decode(&q->ul_sch, cfg, softbuffer, q->q, q->g, data, uci_data);
   } else {
     return SRSLTE_ERROR_INVALID_INPUTS;
   }

lib/src/phy/phch/sequences.c

@@ -33,7 +33,6 @@
  * 36.211 6.6.1
  */
 int srslte_sequence_pbch(srslte_sequence_t *seq, srslte_cp_t cp, uint32_t cell_id) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, SRSLTE_CP_ISNORM(cp)?1920:1728, cell_id);
 }
 
@@ -41,7 +40,6 @@ int srslte_sequence_pbch(srslte_sequence_t *seq, srslte_cp_t cp, uint32_t cell_i
  * 36.211 6.7.1
  */
 int srslte_sequence_pcfich(srslte_sequence_t *seq, uint32_t nslot, uint32_t cell_id) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, 32, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
 }
 
@@ -50,7 +48,6 @@ int srslte_sequence_pcfich(srslte_sequence_t *seq, uint32_t nslot, uint32_t cell
  * 36.211 6.9.1
  */
 int srslte_sequence_phich(srslte_sequence_t *seq, uint32_t nslot, uint32_t cell_id) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, 12, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
 }
 
@@ -58,7 +55,6 @@ int srslte_sequence_phich(srslte_sequence_t *seq, uint32_t nslot, uint32_t cell_
  * 36.211 6.8.2
  */
 int srslte_sequence_pdcch(srslte_sequence_t *seq, uint32_t nslot, uint32_t cell_id, uint32_t len) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, len, (nslot/2) * 512 + cell_id);
 }
 
@@ -66,7 +62,6 @@ int srslte_sequence_pdcch(srslte_sequence_t *seq, uint32_t nslot, uint32_t cell_
  * 36.211 6.3.1
  */
 int srslte_sequence_pdsch(srslte_sequence_t *seq, uint16_t rnti, int q, uint32_t nslot, uint32_t cell_id, uint32_t len) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, len, (rnti<<14) + (q<<13) + ((nslot/2)<<9) + cell_id);
 }
 
@@ -74,7 +69,6 @@ int srslte_sequence_pdsch(srslte_sequence_t *seq, uint16_t rnti, int q, uint32_t
  * 36.211 5.3.1
  */
 int srslte_sequence_pusch(srslte_sequence_t *seq, uint16_t rnti, uint32_t nslot, uint32_t cell_id, uint32_t len) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, len, (rnti<<14) + ((nslot/2)<<9) + cell_id);
 }
 
@@ -82,6 +76,5 @@ int srslte_sequence_pusch(srslte_sequence_t *seq, uint16_t rnti, uint32_t nslot,
  * 36.211 5.4.2
  */
 int srslte_sequence_pucch(srslte_sequence_t *seq, uint16_t rnti, uint32_t nslot, uint32_t cell_id) {
-  bzero(seq, sizeof(srslte_sequence_t));
   return srslte_sequence_LTE_pr(seq, 20, ((((nslot/2)+1)*(2*cell_id+1))<<16)+rnti);
 }

lib/src/phy/phch/test/pbch_file_test.c

@@ -131,7 +131,11 @@ int base_init() {
     return -1;
   }
 
-  if (srslte_chest_dl_init(&chest, cell)) {
+  if (srslte_chest_dl_init(&chest, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    return -1;
+  }
+  if (srslte_chest_dl_set_cell(&chest, cell)) {
     fprintf(stderr, "Error initializing equalizer\n");
     return -1;
   }
@@ -141,7 +145,11 @@ int base_init() {
     return -1;
   }
 
-  if (srslte_pbch_init(&pbch, cell)) {
+  if (srslte_pbch_init(&pbch)) {
+    fprintf(stderr, "Error initiating PBCH\n");
+    return -1;
+  }
+  if (srslte_pbch_set_cell(&pbch, cell)) {
     fprintf(stderr, "Error initiating PBCH\n");
     return -1;
   }

lib/src/phy/phch/test/pbch_test.c

@@ -104,7 +104,11 @@ int main(int argc, char **argv) {
     }
 
   }
-  if (srslte_pbch_init(&pbch, cell)) {
+  if (srslte_pbch_init(&pbch)) {
+    fprintf(stderr, "Error creating PBCH object\n");
+    exit(-1);
+  }
+  if (srslte_pbch_set_cell(&pbch, cell)) {
     fprintf(stderr, "Error creating PBCH object\n");
     exit(-1);
   }

lib/src/phy/phch/test/pcfich_file_test.c

@@ -142,7 +142,11 @@ int base_init() {
     }
   }
   
-  if (srslte_chest_dl_init(&chest, cell)) {
+  if (srslte_chest_dl_init(&chest, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    return -1;
+  }
+  if (srslte_chest_dl_set_cell(&chest, cell)) {
     fprintf(stderr, "Error initializing equalizer\n");
     return -1;
   }
@@ -157,7 +161,11 @@ int base_init() {
     return -1;
   }
 
-  if (srslte_pcfich_init(&pcfich, &regs, cell)) {
+  if (srslte_pcfich_init(&pcfich, 1)) {
+    fprintf(stderr, "Error creating PBCH object\n");
+    return -1;
+  }
+  if (srslte_pcfich_set_cell(&pcfich, &regs, cell)) {
     fprintf(stderr, "Error creating PBCH object\n");
     return -1;
   }

lib/src/phy/phch/test/pcfich_test.c

@@ -124,7 +124,11 @@ int main(int argc, char **argv) {
       exit(-1);
     }
 
-    if (srslte_pcfich_init(&pcfich, &regs, cell)) {
+    if (srslte_pcfich_init(&pcfich, 1)) {
+      fprintf(stderr, "Error creating PBCH object\n");
+      exit(-1);
+    }
+    if (srslte_pcfich_set_cell(&pcfich, &regs, cell)) {
       fprintf(stderr, "Error creating PBCH object\n");
       exit(-1);
     }

lib/src/phy/phch/test/pdcch_file_test.c

@@ -148,7 +148,11 @@ int base_init() {
     }
   }
 
-  if (srslte_chest_dl_init(&chest, cell)) {
+  if (srslte_chest_dl_init(&chest, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    return -1;
+  }
+  if (srslte_chest_dl_set_cell(&chest, cell)) {
     fprintf(stderr, "Error initializing equalizer\n");
     return -1;
   }
@@ -167,11 +171,15 @@ int base_init() {
     fprintf(stderr, "Error setting CFI %d\n", cfi);
     return -1;
   }
-  if (srslte_pdcch_init(&pdcch, &regs, cell)) {
+  if (srslte_pdcch_init_ue(&pdcch, cell.nof_prb, 1)) {
     fprintf(stderr, "Error creating PDCCH object\n");
     exit(-1);
   }
-  
+  if (srslte_pdcch_set_cell(&pdcch, &regs, cell)) {
+    fprintf(stderr, "Error creating PDCCH object\n");
+    exit(-1);
+  }
+
   DEBUG("Memory init OK\n",0);
   return 0;
 }

lib/src/phy/phch/test/pdcch_test.c

@@ -204,15 +204,23 @@ int main(int argc, char **argv) {
     exit(-1);
   }
 
-  if (srslte_pdcch_init_tx(&pdcch_tx, &regs, cell)) {
+  if (srslte_pdcch_init_enb(&pdcch_tx, cell.nof_prb)) {
     fprintf(stderr, "Error creating PDCCH object\n");
     exit(-1);
   }
+  if (srslte_pdcch_set_cell(&pdcch_tx, &regs, cell)) {
+    fprintf(stderr, "Error setting cell in PDCCH object\n");
+    exit(-1);
+  }
 
-  if (srslte_pdcch_init_rx(&pdcch_rx, &regs, cell, nof_rx_ant)) {
+  if (srslte_pdcch_init_ue(&pdcch_rx, cell.nof_prb, nof_rx_ant)) {
     fprintf(stderr, "Error creating PDCCH object\n");
     exit(-1);
   }
+  if (srslte_pdcch_set_cell(&pdcch_rx, &regs, cell)) {
+    fprintf(stderr, "Error setting cell in PDCCH object\n");
+    exit(-1);
+  }
 
   /* Resource allocate init */
   nof_dcis = 0;

lib/src/phy/phch/test/pdsch_pdcch_file_test.c

@@ -137,11 +137,15 @@ int base_init() {
     exit(-1);
   }
 
-  if (srslte_ue_dl_init(&ue_dl, cell, 1)) {
+  if (srslte_ue_dl_init(&ue_dl, cell.nof_prb, 1)) {
     fprintf(stderr, "Error initializing UE DL\n");
     return -1;
   }
-  
+  if (srslte_ue_dl_set_cell(&ue_dl, cell)) {
+    fprintf(stderr, "Error initializing UE DL\n");
+    return -1;
+  }
+
   srslte_ue_dl_set_rnti(&ue_dl, rnti); 
 
   DEBUG("Memory init OK\n",0);

lib/src/phy/phch/test/pdsch_test.c

@@ -153,7 +153,7 @@ int main(int argc, char **argv) {
   int ret = -1;
   struct timeval t[3];
   srslte_softbuffer_tx_t *softbuffers_tx[SRSLTE_MAX_CODEWORDS];
-  int M=10;
+  int M=1;
   bool acks[SRSLTE_MAX_CODEWORDS] = {false};
 
   parse_args(argc,argv);
@@ -213,8 +213,6 @@ int main(int argc, char **argv) {
     return ret;
   }
 
-
-
 #ifdef DO_OFDM
   srslte_ofdm_tx_init(&ofdm_tx, cell.cp, cell.nof_prb);
   srslte_ofdm_rx_init(&ofdm_rx, cell.cp, cell.nof_prb);
@@ -276,7 +274,11 @@ int main(int argc, char **argv) {
     }
   }
 
-  if (srslte_pdsch_init_rx(&pdsch_rx, cell, nof_rx_antennas)) {
+  if (srslte_pdsch_init_ue(&pdsch_rx, cell.nof_prb, nof_rx_antennas)) {
+    fprintf(stderr, "Error creating PDSCH object\n");
+    goto quit;
+  }
+  if (srslte_pdsch_set_cell(&pdsch_rx, cell)) {
     fprintf(stderr, "Error creating PDSCH object\n");
     goto quit;
   }
@@ -333,18 +335,26 @@ int main(int argc, char **argv) {
     srslte_filesource_read(&fsrc, rx_slot_symbols[0], SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp));
 #endif
     
-    srslte_chest_dl_t chest; 
-    if (srslte_chest_dl_init(&chest, cell)) {
+    srslte_chest_dl_t chest;
+    if (srslte_chest_dl_init(&chest, cell.nof_prb)) {
       fprintf(stderr, "Error initializing equalizer\n");
       exit(-1);
     }
+    if (srslte_chest_dl_set_cell(&chest, cell)) {
+      printf("Error initializing equalizer\n");
+      exit(-1);
+    }
     srslte_chest_dl_estimate(&chest, rx_slot_symbols[0], ce[0], subframe);
     srslte_chest_dl_free(&chest);
     
     srslte_filesource_free(&fsrc);
   } else {
 
-    if (srslte_pdsch_init_tx(&pdsch_tx, cell)) {
+    if (srslte_pdsch_init_enb(&pdsch_tx, cell.nof_prb)) {
+      fprintf(stderr, "Error creating PDSCH object\n");
+      goto quit;
+    }
+    if (srslte_pdsch_set_cell(&pdsch_tx, cell)) {
       fprintf(stderr, "Error creating PDSCH object\n");
       goto quit;
     }

lib/src/phy/phch/test/phich_file_test.c

@@ -29,6 +29,7 @@
 #include <string.h>
 #include <strings.h>
 #include <unistd.h>
+#include <srslte/phy/common/phy_common.h>
 
 #include "srslte/srslte.h"
 
@@ -165,7 +166,11 @@ int base_init() {
     }
   }
 
-  if (srslte_chest_dl_init(&chest, cell)) {
+  if (srslte_chest_dl_init(&chest, cell.nof_prb)) {
+    fprintf(stderr, "Error initializing equalizer\n");
+    return -1;
+  }
+  if (srslte_chest_dl_set_cell(&chest, cell)) {
     fprintf(stderr, "Error initializing equalizer\n");
     return -1;
   }
@@ -180,7 +185,11 @@ int base_init() {
     return -1;
   }
 
-  if (srslte_phich_init(&phich, &regs, cell)) {
+  if (srslte_phich_init(&phich, 1)) {
+    fprintf(stderr, "Error creating PBCH object\n");
+    return -1;
+  }
+  if (srslte_phich_set_cell(&phich, &regs, cell)) {
     fprintf(stderr, "Error creating PBCH object\n");
     return -1;
   }

lib/src/phy/phch/test/phich_test.c

@@ -142,6 +142,10 @@ int main(int argc, char **argv) {
     cid = cell.id;
     max_cid = cell.id;
   }
+  if (srslte_phich_init(&phich, 1)) {
+    fprintf(stderr, "Error creating PBCH object\n");
+    exit(-1);
+  }
   while(cid <= max_cid) {
     cell.id = cid;
     
@@ -152,7 +156,7 @@ int main(int argc, char **argv) {
       exit(-1);
     }
 
-    if (srslte_phich_init(&phich, &regs, cell)) {
+    if (srslte_phich_set_cell(&phich, &regs, cell)) {
       fprintf(stderr, "Error creating PBCH object\n");
       exit(-1);
     }
@@ -198,10 +202,10 @@ int main(int argc, char **argv) {
         }
       }
     }
-    srslte_phich_free(&phich);
     srslte_regs_free(&regs);
     cid++;
   }
+  srslte_phich_free(&phich);
 
   for (i=0;i<SRSLTE_MAX_PORTS;i++) {
     free(ce[i]);

lib/src/phy/phch/test/prach_test.c

@@ -85,12 +85,14 @@ int main(int argc, char **argv) {
   cf_t preamble[MAX_LEN];
   memset(preamble, 0, sizeof(cf_t)*MAX_LEN);
 
-  srslte_prach_init(p,
-             N_ifft_ul,
-             config_idx,
-             root_seq_idx,
-             high_speed_flag,
-             zero_corr_zone);
+  srslte_prach_init(p, N_ifft_ul);
+
+  srslte_prach_set_cell( p,
+                         N_ifft_ul,
+                         config_idx,
+                         root_seq_idx,
+                         high_speed_flag,
+                         zero_corr_zone);
 
   uint32_t seq_index = 0;
   uint32_t frequency_offset = 0;

lib/src/phy/phch/test/prach_test_multi.c

@@ -90,12 +90,14 @@ int main(int argc, char **argv) {
   cf_t preamble_sum[MAX_LEN];
   memset(preamble_sum, 0, sizeof(cf_t)*MAX_LEN);
 
-  srslte_prach_init(p,
-             N_ifft_ul,
-             preamble_format,
-             root_seq_idx,
-             high_speed_flag,
-             zero_corr_zone);
+  srslte_prach_init(p, N_ifft_ul);
+
+  srslte_prach_set_cell( p,
+                         N_ifft_ul,
+                         preamble_format,
+                         root_seq_idx,
+                         high_speed_flag,
+                         zero_corr_zone);
 
   uint32_t seq_index = 0;
   uint32_t frequency_offset = 0;

lib/src/phy/phch/test/prach_test_usrp.c

@@ -133,6 +133,9 @@ int main(int argc, char **argv) {
   memset(preamble, 0, sizeof(cf_t)*MAX_LEN);
 
   srslte_prach_init(p,
+                    srslte_symbol_sz(nof_prb));
+
+  srslte_prach_set_cell(p,
                     srslte_symbol_sz(nof_prb),
                     preamble_format,
                     root_seq_idx,

lib/src/phy/phch/test/pucch_test.c

@@ -87,15 +87,23 @@ int main(int argc, char **argv) {
   
   parse_args(argc,argv);
 
-  if (srslte_pucch_init(&pucch, cell)) {
+  if (srslte_pucch_init(&pucch)) {
     fprintf(stderr, "Error creating PDSCH object\n");
     exit(-1);
   }
-  if (srslte_refsignal_ul_init(&dmrs, cell)) {
+  if (srslte_pucch_set_cell(&pucch, cell)) {
     fprintf(stderr, "Error creating PDSCH object\n");
     exit(-1);
   }
-  
+  if (srslte_refsignal_ul_init(&dmrs, cell.nof_prb)) {
+    fprintf(stderr, "Error creating PDSCH object\n");
+    exit(-1);
+  }
+  if (srslte_refsignal_ul_set_cell(&dmrs, cell)) {
+    fprintf(stderr, "Error creating PDSCH object\n");
+    exit(-1);
+  }
+
   bzero(&pucch_cfg, sizeof(srslte_pucch_cfg_t));
   
   for (int i=0;i<SRSLTE_PUCCH_MAX_BITS;i++) {

lib/src/phy/phch/test/pusch_test.c

@@ -110,7 +110,8 @@ void parse_args(int argc, char **argv) {
 }
 
 int main(int argc, char **argv) {
-  srslte_pusch_t pusch;
+  srslte_pusch_t pusch_tx;
+  srslte_pusch_t pusch_rx;
   uint8_t *data = NULL;
   cf_t *sf_symbols = NULL;
   cf_t *ce = NULL; 
@@ -145,11 +146,23 @@ int main(int argc, char **argv) {
   ul_hopping.hopping_offset = 0;
   ul_hopping.hop_mode = SRSLTE_PUSCH_HOP_MODE_INTER_SF;
   
-  if (srslte_pusch_init(&pusch, cell)) {
-    fprintf(stderr, "Error creating PDSCH object\n");
+  if (srslte_pusch_init_ue(&pusch_tx, cell.nof_prb)) {
+    fprintf(stderr, "Error creating PUSCH object\n");
     goto quit;
   }
-  
+  if (srslte_pusch_set_cell(&pusch_tx, cell)) {
+    fprintf(stderr, "Error creating PUSCH object\n");
+    goto quit;
+  }
+  if (srslte_pusch_init_enb(&pusch_rx, cell.nof_prb)) {
+    fprintf(stderr, "Error creating PUSCH object\n");
+    goto quit;
+  }
+  if (srslte_pusch_set_cell(&pusch_rx, cell)) {
+    fprintf(stderr, "Error creating PUSCH object\n");
+    goto quit;
+  }
+
   /* Configure PUSCH */
     
   printf("Encoding rv_idx=%d\n",rv_idx);
@@ -159,14 +172,19 @@ int main(int argc, char **argv) {
   uci_cfg.I_offset_ri = 2; 
   uci_cfg.I_offset_ack = 4; 
 
-  if (srslte_pusch_cfg(&pusch, &cfg, &grant, &uci_cfg, &ul_hopping, NULL, subframe, 0, 0)) {
+  if (srslte_pusch_cfg(&pusch_tx, &cfg, &grant, &uci_cfg, &ul_hopping, NULL, subframe, 0, 0)) {
     fprintf(stderr, "Error configuring PDSCH\n");
     exit(-1);
   }
-  
+  if (srslte_pusch_cfg(&pusch_rx, &cfg, &grant, &uci_cfg, &ul_hopping, NULL, subframe, 0, 0)) {
+    fprintf(stderr, "Error configuring PDSCH\n");
+    exit(-1);
+  }
+
   uint16_t rnti = 1234; 
-  srslte_pusch_set_rnti(&pusch, rnti);
-  
+  srslte_pusch_set_rnti(&pusch_tx, rnti);
+  srslte_pusch_set_rnti(&pusch_rx, rnti);
+
   srslte_uci_data_t uci_data_tx; 
   srslte_uci_data_t uci_data_rx; 
   bzero(&uci_data_tx, sizeof(srslte_uci_data_t));
@@ -212,13 +230,13 @@ int main(int argc, char **argv) {
   
   uint32_t ntrials = 100; 
 
-  if (srslte_pusch_encode(&pusch, &cfg, &softbuffer_tx, data, uci_data_tx, rnti, sf_symbols)) {
+  if (srslte_pusch_encode(&pusch_tx, &cfg, &softbuffer_tx, data, uci_data_tx, rnti, sf_symbols)) {
     fprintf(stderr, "Error encoding TB\n");
     exit(-1);
   }
   if (rv_idx > 0) {
     cfg.rv = rv_idx; 
-    if (srslte_pusch_encode(&pusch, &cfg, &softbuffer_tx, data, uci_data_tx, rnti, sf_symbols)) {
+    if (srslte_pusch_encode(&pusch_tx, &cfg, &softbuffer_tx, data, uci_data_tx, rnti, sf_symbols)) {
       fprintf(stderr, "Error encoding TB\n");
       exit(-1);
     }
@@ -234,7 +252,7 @@ int main(int argc, char **argv) {
   }
   
   gettimeofday(&t[1], NULL);
-  int r = srslte_pusch_decode(&pusch, &cfg, &softbuffer_rx, sf_symbols, ce, 0, rnti, data, &uci_data_rx);
+  int r = srslte_pusch_decode(&pusch_rx, &cfg, &softbuffer_rx, sf_symbols, ce, 0, rnti, data, &uci_data_rx);
   gettimeofday(&t[2], NULL);
   get_time_interval(t);
   if (r) {
@@ -274,7 +292,8 @@ int main(int argc, char **argv) {
   }
 
 quit:
-  srslte_pusch_free(&pusch);
+  srslte_pusch_free(&pusch_tx);
+  srslte_pusch_free(&pusch_rx);
   srslte_softbuffer_tx_free(&softbuffer_tx);
   
   if (sf_symbols) {

lib/src/phy/resampling/interp.c

@@ -27,7 +27,8 @@
 #include <complex.h>
 #include <math.h>
 #include <stdlib.h>
-#include <strings.h> 
+#include <strings.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/resampling/interp.h"
 #include "srslte/phy/utils/vector.h"
@@ -108,11 +109,23 @@ int srslte_interp_linear_vector_init(srslte_interp_linsrslte_vec_t *q, uint32_t
       perror("malloc");
       return SRSLTE_ERROR; 
     }    
-    q->vector_len = vector_len; 
+    q->vector_len     = vector_len;
+    q->max_vector_len = vector_len;
   }
   return ret; 
 }
 
+int srslte_interp_linear_vector_resize(srslte_interp_linsrslte_vec_t *q, uint32_t vector_len)
+{
+  if (vector_len <= q->max_vector_len) {
+    q->vector_len = vector_len;
+    return SRSLTE_SUCCESS;
+  } else {
+    fprintf(stderr, "Error resizing interp_linear: vector_len must be lower or equal than initialized\n");
+    return SRSLTE_ERROR;
+  }
+}
+
 void srslte_interp_linear_vector_free(srslte_interp_linsrslte_vec_t *q) {
   if (q->diff_vec) {
     free(q->diff_vec);
@@ -189,7 +202,9 @@ int srslte_interp_linear_init(srslte_interp_lin_t *q, uint32_t vector_len, uint3
     }
 
     q->vector_len = vector_len; 
-    q->M = M; 
+    q->M = M;
+    q->max_vector_len = vector_len;
+    q->max_M = M;
   }
   return ret; 
 }
@@ -209,6 +224,24 @@ void srslte_interp_linear_free(srslte_interp_lin_t *q) {
 
 }
 
+
+int srslte_interp_linear_resize(srslte_interp_lin_t *q, uint32_t vector_len, uint32_t M)
+{
+  if (vector_len <= q->max_vector_len && M <= q->max_M) {
+
+    for (int i=0;i<M;i++) {
+      q->ramp[i] = (float) i;
+    }
+
+    q->vector_len = vector_len;
+    q->M = M;
+    return SRSLTE_SUCCESS;
+  } else {
+    fprintf(stderr, "Error resizing interp_linear: vector_len and M must be lower or equal than initialized\n");
+    return SRSLTE_ERROR;
+  }
+}
+
 void srslte_interp_linear_offset(srslte_interp_lin_t *q, cf_t *input, cf_t *output, 
                           uint32_t off_st, uint32_t off_end) 
 {

lib/src/phy/rf/rf_uhd_imp.c

@@ -117,6 +117,7 @@ static void* async_thread(void *h) {
       return NULL; 
     }
   }
+  uhd_async_metadata_free(&md);
   return NULL; 
 }
 
@@ -226,7 +227,7 @@ int rf_uhd_start_rx_stream(void *h)
         .stream_now = false
   };
   uhd_usrp_get_time_now(handler->usrp, 0, &stream_cmd.time_spec_full_secs, &stream_cmd.time_spec_frac_secs);
-  stream_cmd.time_spec_frac_secs += 0.5; 
+  stream_cmd.time_spec_frac_secs += 0.1;
   if (stream_cmd.time_spec_frac_secs > 1) {
     stream_cmd.time_spec_frac_secs -= 1;
     stream_cmd.time_spec_full_secs += 1; 
@@ -457,14 +458,17 @@ int rf_uhd_close(void *h)
   uhd_rx_metadata_free(&handler->rx_md_first);
   uhd_rx_metadata_free(&handler->rx_md);
   uhd_meta_range_free(&handler->rx_gain_range);
-  uhd_tx_streamer_free(&handler->tx_stream);
-  uhd_rx_streamer_free(&handler->rx_stream);
   if (handler->has_rssi) {
     uhd_sensor_value_free(&handler->rssi_value);
   }
   handler->async_thread_running = false; 
-  pthread_join(handler->async_thread, NULL); 
+  pthread_join(handler->async_thread, NULL);
+
+  uhd_tx_streamer_free(&handler->tx_stream);
+  uhd_rx_streamer_free(&handler->rx_stream);
   uhd_usrp_free(&handler->usrp);
+
+  free(handler);
   
   /** Something else to close the USRP?? */
   return 0;
@@ -488,8 +492,7 @@ double rf_uhd_set_rx_srate(void *h, double freq)
   for (int i=0;i<handler->nof_rx_channels;i++) {
     uhd_usrp_set_rx_rate(handler->usrp, freq, i);
   }
-  uhd_usrp_get_rx_rate(handler->usrp, 0, &freq);
-  return freq; 
+  return freq;
 }
 
 double rf_uhd_set_tx_srate(void *h, double freq)
@@ -498,7 +501,6 @@ double rf_uhd_set_tx_srate(void *h, double freq)
   for (int i=0;i<handler->nof_tx_channels;i++) {
     uhd_usrp_set_tx_rate(handler->usrp, freq, i);
   }
-  uhd_usrp_get_tx_rate(handler->usrp, 0, &freq);
   handler->tx_rate = freq;
   return freq; 
 }
@@ -509,7 +511,6 @@ double rf_uhd_set_rx_gain(void *h, double gain)
   for (int i=0;i<handler->nof_rx_channels;i++) {
     uhd_usrp_set_rx_gain(handler->usrp, gain, i, "");
   }
-  uhd_usrp_get_rx_gain(handler->usrp, 0, "", &gain);
   return gain;
 }
 
@@ -519,7 +520,6 @@ double rf_uhd_set_tx_gain(void *h, double gain)
   for (int i=0;i<handler->nof_tx_channels;i++) {
     uhd_usrp_set_tx_gain(handler->usrp, gain, i, "");
   }
-  uhd_usrp_get_tx_gain(handler->usrp, 0, "", &gain);
   return gain;
 }
 
@@ -551,7 +551,6 @@ double rf_uhd_set_rx_freq(void *h, double freq)
   for (int i=0;i<handler->nof_rx_channels;i++) {
     uhd_usrp_set_rx_freq(handler->usrp, &tune_request, i, &tune_result);
   }
-  uhd_usrp_get_rx_freq(handler->usrp, 0, &freq);
   return freq;
 }
 
@@ -567,7 +566,6 @@ double rf_uhd_set_tx_freq(void *h, double freq)
   for (int i=0;i<handler->nof_tx_channels;i++) {
     uhd_usrp_set_tx_freq(handler->usrp, &tune_request, i, &tune_result);
   }
-  uhd_usrp_get_tx_freq(handler->usrp, 0, &freq);
   return freq;
 }
 
@@ -629,7 +627,9 @@ int rf_uhd_recv_with_time_multi(void *h,
         log_overflow(handler);
       } else if (error_code == UHD_RX_METADATA_ERROR_CODE_LATE_COMMAND) {
         log_late(handler);
-      } else if (error_code != UHD_RX_METADATA_ERROR_CODE_NONE) {
+      } else if (error_code == UHD_RX_METADATA_ERROR_CODE_TIMEOUT) {
+        fprintf(stderr, "Error timed out while receiving asynchronoous messages from UHD.\n");
+      } else if (error_code != UHD_RX_METADATA_ERROR_CODE_NONE ) {
         fprintf(stderr, "Error code 0x%x was returned during streaming. Aborting.\n", error_code);
       }
       

lib/src/phy/rf/rf_utils.c

@@ -103,11 +103,16 @@ int rf_mib_decoder(srslte_rf_t *rf, uint32_t nof_rx_antennas,cell_search_cfg_t *
   srslte_ue_mib_sync_t ue_mib; 
   uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
 
-  if (srslte_ue_mib_sync_init_multi(&ue_mib, cell->id, cell->cp, srslte_rf_recv_wrapper_cs, nof_rx_antennas, (void*) rf)) {
+  if (srslte_ue_mib_sync_init_multi(&ue_mib, srslte_rf_recv_wrapper_cs, nof_rx_antennas, (void*) rf)) {
     fprintf(stderr, "Error initiating srslte_ue_mib_sync\n");
     goto clean_exit; 
   }
-  
+
+  if (srslte_ue_mib_sync_set_cell(&ue_mib, cell->id, cell->cp)) {
+    fprintf(stderr, "Error initiating srslte_ue_mib_sync\n");
+    goto clean_exit;
+  }
+
   if (config->init_agc > 0) {
     srslte_ue_sync_start_agc(&ue_mib.ue_sync, srslte_rf_set_rx_gain_th_wrapper, config->init_agc);    
   }
@@ -168,7 +173,6 @@ int rf_cell_search(srslte_rf_t *rf, uint32_t nof_rx_antennas,
     fprintf(stderr, "Error initiating UE cell detect\n");
     return SRSLTE_ERROR; 
   }
-  
   if (config->nof_valid_pss_frames) {
     srslte_ue_cellsearch_set_nof_valid_frames(&cs, config->nof_valid_pss_frames);
   }

lib/src/phy/scrambling/scrambling.c

@@ -33,29 +33,29 @@
 #include "srslte/phy/scrambling/scrambling.h"
 
 void srslte_scrambling_f(srslte_sequence_t *s, float *data) {
-  srslte_scrambling_f_offset(s, data, 0, s->len);
+  srslte_scrambling_f_offset(s, data, 0, s->cur_len);
 }
 
 void srslte_scrambling_f_offset(srslte_sequence_t *s, float *data, int offset, int len) {
-  assert (len + offset <= s->len);
+  assert (len + offset <= s->cur_len);
   srslte_vec_prod_fff(data, &s->c_float[offset], data, len);
 }
 
 void srslte_scrambling_s(srslte_sequence_t *s, short *data) {
-  srslte_scrambling_s_offset(s, data, 0, s->len);
+  srslte_scrambling_s_offset(s, data, 0, s->cur_len);
 }
 
 void srslte_scrambling_s_offset(srslte_sequence_t *s, short *data, int offset, int len) {
-  assert (len + offset <= s->len);
+  assert (len + offset <= s->cur_len);
   srslte_vec_prod_sss(data, &s->c_short[offset], data, len);
 }
 
 void srslte_scrambling_c(srslte_sequence_t *s, cf_t *data) {
-  srslte_scrambling_c_offset(s, data, 0, s->len);
+  srslte_scrambling_c_offset(s, data, 0, s->cur_len);
 }
 
 void srslte_scrambling_c_offset(srslte_sequence_t *s, cf_t *data, int offset, int len) {
-  assert (len + offset <= s->len);
+  assert (len + offset <= s->cur_len);
   srslte_vec_prod_cfc(data, &s->c_float[offset], data, len);
 }
 
@@ -81,7 +81,7 @@ void scrambling_b_word(uint8_t *c, uint8_t *data, int len) {
 
 
 void srslte_scrambling_b(srslte_sequence_t *s, uint8_t *data) {
-  scrambling_b_word(s->c, data, s->len);  
+  scrambling_b_word(s->c, data, s->cur_len);  
 }
 
 void srslte_scrambling_b_offset(srslte_sequence_t *s, uint8_t *data, int offset, int len) {

lib/src/phy/scrambling/test/scrambling_test.c

@@ -84,8 +84,10 @@ void parse_args(int argc, char **argv) {
 
 int init_sequence(srslte_sequence_t *seq, char *name) {
   if (!strcmp(name, "PBCH")) {
+    bzero(seq, sizeof(srslte_sequence_t));
     return srslte_sequence_pbch(seq, cp, cell_id);
   } else if (!strcmp(name, "PDSCH")) {
+    bzero(seq, sizeof(srslte_sequence_t));
     return srslte_sequence_pdsch(seq, 1234, 0, 0, cell_id, nof_bits);
   } else {
     fprintf(stderr, "Unsupported sequence name %s\n", name);
@@ -109,18 +111,18 @@ int main(int argc, char **argv) {
   }
 
   if (!do_floats) {
-    input_b = malloc(sizeof(uint8_t) * seq.len);
+    input_b = malloc(sizeof(uint8_t) * seq.cur_len);
     if (!input_b) {
       perror("malloc");
       exit(-1);
     }
-    scrambled_b = malloc(sizeof(uint8_t) * seq.len);
+    scrambled_b = malloc(sizeof(uint8_t) * seq.cur_len);
     if (!scrambled_b) {
       perror("malloc");
       exit(-1);
     }
 
-    for (i=0;i<seq.len;i++) {
+    for (i=0;i<seq.cur_len;i++) {
       input_b[i] = rand()%2;
       scrambled_b[i] = input_b[i];
     }
@@ -131,9 +133,9 @@ int main(int argc, char **argv) {
     srslte_scrambling_b(&seq, scrambled_b);
 
     get_time_interval(t);
-    printf("Texec=%ld us for %d bits\n", t[0].tv_usec, seq.len);
+    printf("Texec=%ld us for %d bits\n", t[0].tv_usec, seq.cur_len);
     
-    for (i=0;i<seq.len;i++) {
+    for (i=0;i<seq.cur_len;i++) {
       if (scrambled_b[i] != input_b[i]) {
         printf("Error in %d\n", i);
         exit(-1);
@@ -142,18 +144,18 @@ int main(int argc, char **argv) {
     free(input_b);
     free(scrambled_b);
   } else {
-    input_f = malloc(sizeof(float) * seq.len);
+    input_f = malloc(sizeof(float) * seq.cur_len);
     if (!input_f) {
       perror("malloc");
       exit(-1);
     }
-    scrambled_f = malloc(sizeof(float) * seq.len);
+    scrambled_f = malloc(sizeof(float) * seq.cur_len);
     if (!scrambled_f) {
       perror("malloc");
       exit(-1);
     }
 
-    for (i=0;i<seq.len;i++) {
+    for (i=0;i<seq.cur_len;i++) {
       input_f[i] = 100*(rand()/RAND_MAX);
       scrambled_f[i] = input_f[i];
     }
@@ -164,9 +166,9 @@ int main(int argc, char **argv) {
     srslte_scrambling_f(&seq, scrambled_f);
 
     get_time_interval(t);
-    printf("Texec=%ld us for %d bits\n", t[0].tv_usec, seq.len);
+    printf("Texec=%ld us for %d bits\n", t[0].tv_usec, seq.cur_len);
 
-    for (i=0;i<seq.len;i++) {
+    for (i=0;i<seq.cur_len;i++) {
       if (scrambled_f[i] != input_f[i]) {
         printf("Error in %d\n", i);
         exit(-1);

lib/src/phy/sync/cfo.c

@@ -27,6 +27,7 @@
 #include <strings.h>
 #include <stdlib.h>
 #include <math.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/utils/cexptab.h"
 #include "srslte/phy/sync/cfo.h"
@@ -47,6 +48,7 @@ int srslte_cfo_init(srslte_cfo_t *h, uint32_t nsamples) {
   h->tol = SRSLTE_CFO_TOLERANCE;
   h->last_freq = 0;
   h->nsamples = nsamples;
+  h->max_samples = nsamples;
   srslte_cexptab_gen(&h->tab, h->cur_cexp, h->last_freq, h->nsamples);
 
   ret = SRSLTE_SUCCESS;
@@ -69,15 +71,15 @@ void srslte_cfo_set_tol(srslte_cfo_t *h, float tol) {
   h->tol = tol;
 }
 
-int srslte_cfo_realloc(srslte_cfo_t *h, uint32_t samples) {
-  h->cur_cexp = realloc(h->cur_cexp, sizeof(cf_t) * samples); 
-  if (!h->cur_cexp) {
-    perror("realloc");
+int srslte_cfo_resize(srslte_cfo_t *h, uint32_t samples) {
+  if (samples <= h->max_samples) {
+    srslte_cexptab_gen(&h->tab, h->cur_cexp, h->last_freq, samples);
+    h->nsamples = samples;
+  } else {
+    fprintf(stderr, "Error in cfo_resize(): nof_samples must be lower than initialized\n");
     return SRSLTE_ERROR;
   }
-  srslte_cexptab_gen(&h->tab, h->cur_cexp, h->last_freq, samples);
-  h->nsamples = samples;
-  
+
   return SRSLTE_SUCCESS;
 }
 

lib/src/phy/sync/cp.c

@@ -25,6 +25,7 @@
  */
 
 #include <stdlib.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/sync/cp.h"
 #include "srslte/phy/utils/vector.h"
@@ -33,7 +34,8 @@
 int srslte_cp_synch_init(srslte_cp_synch_t *q, uint32_t symbol_sz) 
 {
   q->symbol_sz = symbol_sz;
-  
+  q->max_symbol_sz = symbol_sz;
+
   q->corr = srslte_vec_malloc(sizeof(cf_t) * q->symbol_sz);
   if (!q->corr) {
     perror("malloc");
@@ -49,6 +51,18 @@ void srslte_cp_synch_free(srslte_cp_synch_t *q)
   }
 }
 
+int srslte_cp_synch_resize(srslte_cp_synch_t *q, uint32_t symbol_sz)
+{
+  if (symbol_sz > q->max_symbol_sz) {
+    fprintf(stderr, "Error in cp_synch_resize(): symbol_sz must be lower than initialized\n");
+    return SRSLTE_ERROR;
+  }
+  q->symbol_sz = symbol_sz;
+
+  return SRSLTE_SUCCESS;
+}
+
+
 uint32_t srslte_cp_synch(srslte_cp_synch_t *q, cf_t *input, uint32_t max_offset, uint32_t nof_symbols, uint32_t cp_len)
 {  
   if (max_offset > q->symbol_sz) {    

lib/src/phy/sync/pss.c

@@ -30,6 +30,7 @@
 #include <stdlib.h>
 #include <complex.h>
 #include <math.h>
+#include <srslte/phy/sync/pss.h>
 
 #include "srslte/phy/sync/pss.h"
 #include "srslte/phy/dft/dft.h"
@@ -93,9 +94,11 @@ int srslte_pss_synch_init_fft_offset(srslte_pss_synch_t *q, uint32_t frame_size,
  * It correlates a signal of frame_size samples with the PSS sequence in the frequency 
  * domain. The PSS sequence is transformed using fft_size samples. 
  */
-int srslte_pss_synch_init_fft_offset_decim(srslte_pss_synch_t *q, uint32_t frame_size, uint32_t fft_size, int offset, int decimate) {
+int srslte_pss_synch_init_fft_offset_decim(srslte_pss_synch_t *q,
+                                           uint32_t max_frame_size, uint32_t max_fft_size,
+                                           int offset, int decimate)
+{
 
-    
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
   if (q != NULL) {
   
@@ -107,18 +110,20 @@ int srslte_pss_synch_init_fft_offset_decim(srslte_pss_synch_t *q, uint32_t frame
     
     q->N_id_2 = 10;  
     q->ema_alpha = 0.2;
-    
+
+    q->max_fft_size  = max_fft_size;
+    q->max_frame_size = max_frame_size;
+
     q->decimate = decimate;
-    fft_size = fft_size/q->decimate;
-    frame_size = frame_size/q->decimate;
+    uint32_t fft_size = max_fft_size/q->decimate;
+    uint32_t frame_size = max_frame_size/q->decimate;
     
     q->fft_size = fft_size;
     q->frame_size = frame_size;
 
     buffer_size = fft_size + frame_size + 1;
-    
-    if(q->decimate > 1)
-    {
+
+    if(q->decimate > 1) {
         int filter_order = 3;
         srslte_filt_decim_cc_init(&q->filter,q->decimate,filter_order);
         q->filter.filter_output = srslte_vec_malloc((buffer_size) * sizeof(cf_t));
@@ -175,21 +180,19 @@ int srslte_pss_synch_init_fft_offset_decim(srslte_pss_synch_t *q, uint32_t frame
         goto clean_and_exit;
       }      
       bzero(&q->pss_signal_time[N_id_2][q->fft_size], q->frame_size * sizeof(cf_t));
-
     }    
     #ifdef CONVOLUTION_FFT
 
 
-    for(N_id_2 = 0; N_id_2<3; N_id_2++)
+    for(N_id_2=0; N_id_2<3; N_id_2++)
     q->pss_signal_freq_full[N_id_2]   = srslte_vec_malloc(buffer_size * sizeof(cf_t));
 
     if (srslte_conv_fft_cc_init(&q->conv_fft, frame_size, fft_size)) {
       fprintf(stderr, "Error initiating convolution FFT\n");
       goto clean_and_exit;
     }
-    for(int i =0; i< 3; i++)
-    {
-        srslte_dft_run_c(&q->conv_fft.filter_plan, q->pss_signal_time[i], q->pss_signal_freq_full[i]);
+    for(int i=0; i<3; i++) {
+      srslte_dft_run_c(&q->conv_fft.filter_plan, q->pss_signal_time[i], q->pss_signal_freq_full[i]);
     }
     
     #endif
@@ -208,6 +211,79 @@ clean_and_exit:
 }
 
 
+/* Initializes the PSS synchronization object.
+ *
+ * It correlates a signal of frame_size samples with the PSS sequence in the frequency
+ * domain. The PSS sequence is transformed using fft_size samples.
+ */
+int srslte_pss_synch_resize(srslte_pss_synch_t *q, uint32_t frame_size, uint32_t fft_size, int offset) {
+
+
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+  if (q != NULL) {
+
+    ret = SRSLTE_ERROR;
+
+    if (fft_size > q->max_fft_size || frame_size > q->max_frame_size) {
+      fprintf(stderr, "Error in pss_synch_config(): fft_size and frame_size must be lower than initialized\n");
+      return SRSLTE_ERROR;
+    }
+
+    uint32_t N_id_2;
+    uint32_t buffer_size;
+
+    q->N_id_2 = 10;
+    q->ema_alpha = 0.2;
+
+    fft_size = fft_size/q->decimate;
+    frame_size = frame_size/q->decimate;
+
+    q->fft_size = fft_size;
+    q->frame_size = frame_size;
+
+    buffer_size = fft_size + frame_size + 1;
+
+    if (srslte_dft_replan(&q->dftp_input, fft_size)) {
+      fprintf(stderr, "Error creating DFT plan \n");
+      return SRSLTE_ERROR;
+    }
+
+    bzero(&q->tmp_input[q->frame_size], q->fft_size * sizeof(cf_t));
+    bzero(q->conv_output, sizeof(cf_t) * buffer_size);
+    bzero(q->conv_output_avg, sizeof(float) * buffer_size);
+
+#ifdef SRSLTE_PSS_ACCUMULATE_ABS
+    bzero(q->conv_output_abs, sizeof(float) * buffer_size);
+#endif
+
+    // Generate PSS sequences for this FFT size
+    for (N_id_2=0;N_id_2<3;N_id_2++) {
+      if (srslte_pss_synch_init_N_id_2(q->pss_signal_freq[N_id_2], q->pss_signal_time[N_id_2], N_id_2, fft_size, offset)) {
+        fprintf(stderr, "Error initiating PSS detector for N_id_2=%d fft_size=%d\n", N_id_2, fft_size);
+        return SRSLTE_ERROR;
+      }
+      bzero(&q->pss_signal_time[N_id_2][q->fft_size], q->frame_size * sizeof(cf_t));
+    }
+#ifdef CONVOLUTION_FFT
+
+    if (srslte_conv_fft_cc_replan(&q->conv_fft, frame_size, fft_size)) {
+      fprintf(stderr, "Error initiating convolution FFT\n");
+      return SRSLTE_ERROR;
+    }
+    for(int i =0; i< 3; i++) {
+      srslte_dft_run_c(&q->conv_fft.filter_plan, q->pss_signal_time[i], q->pss_signal_freq_full[i]);
+    }
+
+#endif
+
+    srslte_pss_synch_reset(q);
+
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+
+}
+
 void srslte_pss_synch_free(srslte_pss_synch_t *q) {
   uint32_t i;
 

lib/src/phy/sync/sss.c

@@ -58,7 +58,8 @@ int srslte_sss_synch_init(srslte_sss_synch_t *q, uint32_t fft_size) {
     srslte_dft_plan_set_dc(&q->dftp_input, true);
 
     q->fft_size = fft_size; 
-    
+    q->max_fft_size = fft_size;
+
     generate_N_id_1_table(q->N_id_1_table);
     
     for (N_id_2=0;N_id_2<3;N_id_2++) {
@@ -71,19 +72,18 @@ int srslte_sss_synch_init(srslte_sss_synch_t *q, uint32_t fft_size) {
   return SRSLTE_ERROR_INVALID_INPUTS;
 }
 
-int srslte_sss_synch_realloc(srslte_sss_synch_t *q, uint32_t fft_size) {
+int srslte_sss_synch_resize(srslte_sss_synch_t *q, uint32_t fft_size) {
   if (q                 != NULL  &&
       fft_size          <= 2048)
   {
-    srslte_dft_plan_free(&q->dftp_input);
-    if (srslte_dft_plan(&q->dftp_input, fft_size, SRSLTE_DFT_FORWARD, SRSLTE_DFT_COMPLEX)) {
+    if (fft_size > q->max_fft_size) {
+      fprintf(stderr, "Error in sss_synch_resize(): fft_size must be lower than initialized\n");
+      return SRSLTE_ERROR;
+    }
+    if (srslte_dft_replan(&q->dftp_input, fft_size)) {
       srslte_sss_synch_free(q);
       return SRSLTE_ERROR;
     }
-    srslte_dft_plan_set_mirror(&q->dftp_input, true);
-    srslte_dft_plan_set_norm(&q->dftp_input, true);
-    srslte_dft_plan_set_dc(&q->dftp_input, true);
-    
     q->fft_size = fft_size;
     return SRSLTE_SUCCESS;
   }

lib/src/phy/sync/sync.c

@@ -28,6 +28,8 @@
 #include <strings.h>
 #include <complex.h>
 #include <math.h>
+#include <srslte/srslte.h>
+#include <srslte/phy/sync/sync.h>
 
 #include "srslte/phy/utils/debug.h"
 #include "srslte/phy/common/phy_common.h"
@@ -39,6 +41,8 @@
 #define CFO_EMA_ALPHA           0.1
 #define CP_EMA_ALPHA            0.1
 
+#define DEFAULT_CFO_TOL         50.0 // Hz
+
 static bool fft_size_isvalid(uint32_t fft_size) {
   if (fft_size >= SRSLTE_SYNC_FFT_SZ_MIN && fft_size <= SRSLTE_SYNC_FFT_SZ_MAX && (fft_size%64) == 0) {
     return true;
@@ -77,7 +81,10 @@ int srslte_sync_init_decim(srslte_sync_t *q, uint32_t frame_size, uint32_t max_o
     q->frame_size = frame_size;
     q->max_offset = max_offset;
     q->sss_alg = SSS_FULL;
-        
+    q->max_frame_size = frame_size;
+    q->mean_cfo_isunset = true;
+    q->mean_cfo2_isunset = true;
+
     q->enable_cfo_corr = true; 
     if (srslte_cfo_init(&q->cfocorr, q->frame_size)) {
       fprintf(stderr, "Error initiating CFO\n");
@@ -89,11 +96,8 @@ int srslte_sync_init_decim(srslte_sync_t *q, uint32_t frame_size, uint32_t max_o
       goto clean_exit;
     }
     
-    // Set a CFO tolerance of approx 50 Hz
-    srslte_cfo_set_tol(&q->cfocorr, 50.0/(15000.0*q->fft_size));
-
-    // Set a CFO tolerance of approx 50 Hz
-    srslte_cfo_set_tol(&q->cfocorr2, 50.0/(15000.0*q->fft_size));
+    // Set default CFO tolerance
+    srslte_sync_set_cfo_tol(q, DEFAULT_CFO_TOL);
 
     for (int i=0;i<2;i++) {
       q->cfo_i_corr[i] = srslte_vec_malloc(sizeof(cf_t)*q->frame_size);
@@ -111,11 +115,11 @@ int srslte_sync_init_decim(srslte_sync_t *q, uint32_t frame_size, uint32_t max_o
     
     srslte_sync_set_cp(q, SRSLTE_CP_NORM);
     q->decimate = decimate;
-    if(!decimate)
+    if(!decimate) {
       decimate = 1;
-                 
-    
-    if (srslte_pss_synch_init_fft_offset_decim(&q->pss, max_offset, fft_size,0,decimate)) {
+    }
+
+    if (srslte_pss_synch_init_fft_offset_decim(&q->pss, max_offset, fft_size, 0, decimate)) {
       fprintf(stderr, "Error initializing PSS object\n");
       goto clean_exit;
     }
@@ -162,6 +166,80 @@ void srslte_sync_free(srslte_sync_t *q) {
   }
 }
 
+int srslte_sync_resize(srslte_sync_t *q, uint32_t frame_size, uint32_t max_offset, uint32_t fft_size) {
+
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                 != NULL         &&
+      frame_size        <= 307200       &&
+      fft_size_isvalid(fft_size))
+  {
+    ret = SRSLTE_ERROR;
+
+    if (frame_size > q->max_frame_size) {
+      fprintf(stderr, "Error in sync_resize(): frame_size must be lower than initialized\n");
+      return SRSLTE_ERROR;
+    }
+    q->detect_cp = true;
+    q->sss_en = true;
+    q->mean_cfo = 0;
+    q->mean_cfo2 = 0;
+    q->N_id_2 = 1000;
+    q->N_id_1 = 1000;
+    q->cfo_i = 0;
+    q->find_cfo_i = false;
+    q->find_cfo_i_initiated = false;
+    q->cfo_ema_alpha = CFO_EMA_ALPHA;
+    q->fft_size = fft_size;
+    q->frame_size = frame_size;
+    q->max_offset = max_offset;
+    q->sss_alg = SSS_FULL;
+
+    q->enable_cfo_corr = true;
+
+    if (srslte_pss_synch_resize(&q->pss, max_offset, fft_size, 0)) {
+      fprintf(stderr, "Error resizing PSS object\n");
+      return SRSLTE_ERROR;
+    }
+    if (srslte_sss_synch_resize(&q->sss, fft_size)) {
+      fprintf(stderr, "Error resizing SSS object\n");
+      return SRSLTE_ERROR;
+    }
+
+    if (srslte_cp_synch_resize(&q->cp_synch, fft_size)) {
+      fprintf(stderr, "Error resizing CFO\n");
+      return SRSLTE_ERROR;
+    }
+
+    if (srslte_cfo_resize(&q->cfocorr, q->frame_size)) {
+      fprintf(stderr, "Error resizing CFO\n");
+      return SRSLTE_ERROR;
+    }
+
+    if (srslte_cfo_resize(&q->cfocorr2, q->frame_size)) {
+      fprintf(stderr, "Error resizing CFO\n");
+      return SRSLTE_ERROR;
+    }
+
+    // Update CFO tolerance
+    srslte_sync_set_cfo_tol(q, q->current_cfo_tol);
+
+    DEBUG("SYNC init with frame_size=%d, max_offset=%d and fft_size=%d\n", frame_size, max_offset, fft_size);
+
+    ret = SRSLTE_SUCCESS;
+  }  else {
+    fprintf(stderr, "Invalid parameters frame_size: %d, fft_size: %d\n", frame_size, fft_size);
+  }
+
+  return ret;
+}
+
+void srslte_sync_set_cfo_tol(srslte_sync_t *q, float tol) {
+  q->current_cfo_tol = tol;
+  srslte_cfo_set_tol(&q->cfocorr, tol/(15000.0*q->fft_size));
+  srslte_cfo_set_tol(&q->cfocorr2, tol/(15000.0*q->fft_size));
+}
+
 void srslte_sync_set_threshold(srslte_sync_t *q, float threshold) {
   q->threshold = threshold;
 }
@@ -217,7 +295,10 @@ float srslte_sync_get_cfo(srslte_sync_t *q) {
 }
 
 void srslte_sync_set_cfo(srslte_sync_t *q, float cfo) {
-  q->mean_cfo = cfo;
+  q->mean_cfo  = cfo;
+  q->mean_cfo2 = cfo;
+  q->mean_cfo2_isunset = false;
+  q->mean_cfo_isunset  = false;
 }
 
 void srslte_sync_set_cfo_i(srslte_sync_t *q, int cfo_i) {
@@ -445,13 +526,18 @@ srslte_sync_find_ret_t srslte_sync_find(srslte_sync_t *q, cf_t *input, uint32_t
     cf_t *input_cfo = input; 
 
     if (q->enable_cfo_corr) {
-      float cfo = cfo_estimate(q, input); 
-      
-      /* compute exponential moving average CFO */
-      q->mean_cfo = SRSLTE_VEC_EMA(cfo, q->mean_cfo, q->cfo_ema_alpha);
-      
+      float cfo = cfo_estimate(q, input);
+
+      if (q->mean_cfo_isunset) {
+        q->mean_cfo = cfo;
+        q->mean_cfo_isunset = false;
+      } else {
+        /* compute exponential moving average CFO */
+        q->mean_cfo = SRSLTE_VEC_EMA(cfo, q->mean_cfo, q->cfo_ema_alpha);
+      }
+
       /* Correct CFO with the averaged CFO estimation */
-      srslte_cfo_correct(&q->cfocorr2, input, q->temp, -q->mean_cfo / q->fft_size);      
+      srslte_cfo_correct(&q->cfocorr2, input, q->temp, -q->mean_cfo / q->fft_size);
       
       input_cfo = q->temp; 
     }
@@ -504,8 +590,13 @@ srslte_sync_find_ret_t srslte_sync_find(srslte_sync_t *q, cf_t *input, uint32_t
   
       if (peak_pos + find_offset >= 2*(q->fft_size + SRSLTE_CP_LEN_EXT(q->fft_size))) {
         float cfo2   = srslte_pss_synch_cfo_compute(&q->pss, &input[find_offset + peak_pos - q->fft_size]);
-        q->mean_cfo2 = SRSLTE_VEC_EMA(cfo2, q->mean_cfo2, q->cfo_ema_alpha);
-        
+        if (q->mean_cfo2_isunset) {
+          q->mean_cfo2 = cfo2;
+          q->mean_cfo2_isunset = true;
+        } else {
+          q->mean_cfo2 = SRSLTE_VEC_EMA(cfo2, q->mean_cfo2, q->cfo_ema_alpha);
+        }
+
         ret = SRSLTE_SYNC_FOUND;
       } else {
         ret = SRSLTE_SYNC_FOUND_NOSPACE; 
@@ -526,7 +617,7 @@ srslte_sync_find_ret_t srslte_sync_find(srslte_sync_t *q, cf_t *input, uint32_t
 }
 
 void srslte_sync_reset(srslte_sync_t *q) {
-  q->M_ext_avg = 0; 
+  q->M_ext_avg  = 0;
   q->M_norm_avg = 0; 
   srslte_pss_synch_reset(&q->pss);
 }

lib/src/phy/ue/ue_cell_search.c

@@ -29,6 +29,7 @@
 #include <strings.h>
 #include <assert.h>
 #include <unistd.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/ue/ue_cell_search.h"
 
@@ -51,11 +52,16 @@ int srslte_ue_cellsearch_init(srslte_ue_cellsearch_t * q, uint32_t max_frames,
     cell.id = SRSLTE_CELL_ID_UNKNOWN; 
     cell.nof_prb = SRSLTE_CS_NOF_PRB; 
 
-    if (srslte_ue_sync_init(&q->ue_sync, cell, recv_callback, stream_handler)) {
+    if (srslte_ue_sync_init(&q->ue_sync, cell.nof_prb, true, recv_callback, stream_handler)) {
       fprintf(stderr, "Error initiating ue_sync\n");
       goto clean_exit; 
     }
-    
+
+    if (srslte_ue_sync_set_cell(&q->ue_sync, cell)) {
+      fprintf(stderr, "Error initiating ue_sync\n");
+      goto clean_exit;
+    }
+
     q->sf_buffer[0] = srslte_vec_malloc(3*sizeof(cf_t)*SRSLTE_SF_LEN_PRB(100));
     q->nof_rx_antennas = 1; 
     
@@ -105,11 +111,15 @@ int srslte_ue_cellsearch_init_multi(srslte_ue_cellsearch_t * q, uint32_t max_fra
     cell.id = SRSLTE_CELL_ID_UNKNOWN; 
     cell.nof_prb = SRSLTE_CS_NOF_PRB; 
 
-    if (srslte_ue_sync_init_multi(&q->ue_sync, cell, recv_callback, nof_rx_antennas, stream_handler)) {
+    if (srslte_ue_sync_init_multi(&q->ue_sync, cell.nof_prb, true, recv_callback, nof_rx_antennas, stream_handler)) {
       fprintf(stderr, "Error initiating ue_sync\n");
       goto clean_exit; 
     }
-    
+    if (srslte_ue_sync_set_cell(&q->ue_sync, cell)) {
+      fprintf(stderr, "Error initiating ue_sync\n");
+      goto clean_exit;
+    }
+
     for (int i=0;i<nof_rx_antennas;i++) {
       q->sf_buffer[i] = srslte_vec_malloc(3*sizeof(cf_t)*SRSLTE_SF_LEN_PRB(100));
     }
@@ -242,7 +252,8 @@ int srslte_ue_cellsearch_scan(srslte_ue_cellsearch_t * q,
 {
   int ret = 0; 
   float max_peak_value = -1.0;
-  uint32_t nof_detected_cells = 0; 
+  uint32_t nof_detected_cells = 0;
+
   for (uint32_t N_id_2=0;N_id_2<3 && ret >= 0;N_id_2++) {
     ret = srslte_ue_cellsearch_scan_N_id_2(q, N_id_2, &found_cells[N_id_2]);
     if (ret < 0) {
@@ -273,8 +284,12 @@ int srslte_ue_cellsearch_scan_N_id_2(srslte_ue_cellsearch_t * q,
 
   if (q != NULL) 
   {
-    ret = SRSLTE_SUCCESS; 
-    
+    ret = SRSLTE_SUCCESS;
+
+    bzero(q->candidates, sizeof(srslte_ue_cellsearch_result_t)*q->max_frames);
+    bzero(q->mode_ntimes, sizeof(uint32_t)*q->max_frames);
+    bzero(q->mode_counted, sizeof(uint8_t)*q->max_frames);
+
     srslte_ue_sync_set_N_id_2(&q->ue_sync, N_id_2);
     srslte_ue_sync_reset(&q->ue_sync);
     do {

lib/src/phy/ue/ue_dl.c

@@ -27,6 +27,7 @@
 #include "srslte/phy/ue/ue_dl.h"
 
 #include <string.h>
+#include <srslte/srslte.h>
 
 
 #define CURRENT_FFTSIZE   srslte_symbol_sz(q->cell.nof_prb)
@@ -35,6 +36,7 @@
 #define CURRENT_SLOTLEN_RE SRSLTE_SLOT_LEN_RE(q->cell.nof_prb, q->cell.cp)
 #define CURRENT_SFLEN_RE SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)
 
+#define MAX_SFLEN_RE SRSLTE_SF_LEN_RE(max_prb, q->cell.cp)
 
 const static srslte_dci_format_t ue_dci_formats[8][2] = {
     /* Mode 1 */ {SRSLTE_DCI_FORMAT1A, SRSLTE_DCI_FORMAT1},
@@ -51,57 +53,50 @@ static srslte_dci_format_t common_formats[] = {SRSLTE_DCI_FORMAT1A,SRSLTE_DCI_FO
 const uint32_t nof_common_formats = 2; 
 
 int srslte_ue_dl_init(srslte_ue_dl_t *q,
-                      srslte_cell_t cell,
+                      uint32_t max_prb,
                       uint32_t nof_rx_antennas)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS; 
   
   if (q               != NULL             &&
-      nof_rx_antennas <= SRSLTE_MAX_PORTS &&
-      srslte_cell_isvalid(&cell))   
+      nof_rx_antennas <= SRSLTE_MAX_PORTS)
   {
     ret = SRSLTE_ERROR;
     
     bzero(q, sizeof(srslte_ue_dl_t));
     
-    q->cell = cell; 
     q->pkt_errors = 0;
     q->pkts_total = 0;
     q->pending_ul_dci_rnti = 0; 
     q->sample_offset = 0; 
-    q->nof_rx_antennas = nof_rx_antennas; 
-    
-    if (srslte_ofdm_rx_init(&q->fft, q->cell.cp, q->cell.nof_prb)) {
+    q->nof_rx_antennas = nof_rx_antennas;
+
+    if (srslte_ofdm_rx_init(&q->fft, SRSLTE_CP_NORM, max_prb)) {
       fprintf(stderr, "Error initiating FFT\n");
       goto clean_exit;
     }
-    if (srslte_chest_dl_init(&q->chest, cell)) {
+    if (srslte_chest_dl_init(&q->chest, max_prb)) {
       fprintf(stderr, "Error initiating channel estimator\n");
       goto clean_exit;
     }
-    if (srslte_regs_init(&q->regs, q->cell)) {
-      fprintf(stderr, "Error initiating REGs\n");
-      goto clean_exit;
-    }
-    if (srslte_pcfich_init_multi(&q->pcfich, &q->regs, q->cell, nof_rx_antennas)) {
+    if (srslte_pcfich_init(&q->pcfich, nof_rx_antennas)) {
       fprintf(stderr, "Error creating PCFICH object\n");
       goto clean_exit;
     }
-    if (srslte_phich_init(&q->phich, &q->regs, q->cell)) {
+    if (srslte_phich_init(&q->phich, nof_rx_antennas)) {
       fprintf(stderr, "Error creating PHICH object\n");
       goto clean_exit;
     }
 
-    if (srslte_pdcch_init_multi(&q->pdcch, &q->regs, q->cell, nof_rx_antennas)) {
+    if (srslte_pdcch_init_ue(&q->pdcch, max_prb, nof_rx_antennas)) {
       fprintf(stderr, "Error creating PDCCH object\n");
       goto clean_exit;
     }
 
-    if (srslte_pdsch_init_rx(&q->pdsch, q->cell, nof_rx_antennas)) {
+    if (srslte_pdsch_init_ue(&q->pdsch, max_prb, nof_rx_antennas)) {
       fprintf(stderr, "Error creating PDSCH object\n");
       goto clean_exit;
     }
-
     for (int i = 0; i < SRSLTE_MAX_TB; i++) {
       q->softbuffers[i] = srslte_vec_malloc(sizeof(srslte_softbuffer_rx_t));
       if (!q->softbuffers[i]) {
@@ -109,25 +104,25 @@ int srslte_ue_dl_init(srslte_ue_dl_t *q,
         goto clean_exit;
       }
 
-      if (srslte_softbuffer_rx_init(q->softbuffers[i], q->cell.nof_prb)) {
+      if (srslte_softbuffer_rx_init(q->softbuffers[i], max_prb)) {
         fprintf(stderr, "Error initiating soft buffer\n");
         goto clean_exit;
       }
     }
-    if (srslte_cfo_init(&q->sfo_correct, q->cell.nof_prb*SRSLTE_NRE)) {
+    if (srslte_cfo_init(&q->sfo_correct, max_prb*SRSLTE_NRE)) {
       fprintf(stderr, "Error initiating SFO correct\n");
       goto clean_exit;
     }
     srslte_cfo_set_tol(&q->sfo_correct, 1e-5f/q->fft.symbol_sz);
     
     for (int j=0;j<nof_rx_antennas;j++) {
-      q->sf_symbols_m[j] = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
+      q->sf_symbols_m[j] = srslte_vec_malloc(MAX_SFLEN_RE * sizeof(cf_t));
       if (!q->sf_symbols_m[j]) {
         perror("malloc");
         goto clean_exit; 
       }
-      for (uint32_t i=0;i<q->cell.nof_ports;i++) {
-        q->ce_m[i][j] = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
+      for (uint32_t i=0;i<SRSLTE_MAX_PORTS;i++) {
+        q->ce_m[i][j] = srslte_vec_malloc(MAX_SFLEN_RE * sizeof(cf_t));
         if (!q->ce_m[i][j]) {
           perror("malloc");
           goto clean_exit; 
@@ -136,14 +131,13 @@ int srslte_ue_dl_init(srslte_ue_dl_t *q,
     }
     
     q->sf_symbols = q->sf_symbols_m[0];
-    for (int i=0;i<q->cell.nof_ports;i++) {
+    for (int i=0;i<SRSLTE_MAX_PORTS;i++) {
       q->ce[i] = q->ce_m[i][0];
     }
     
     ret = SRSLTE_SUCCESS;
   } else {
-    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
-            cell.id, cell.nof_ports, cell.nof_prb);      
+    fprintf(stderr, "Invalid parametres\n");
   }
 
 clean_exit: 
@@ -173,7 +167,7 @@ void srslte_ue_dl_free(srslte_ue_dl_t *q) {
       if (q->sf_symbols_m[j]) {
         free(q->sf_symbols_m[j]);
       }
-      for (uint32_t i=0;i<q->cell.nof_ports;i++) {
+      for (uint32_t i=0;i<SRSLTE_MAX_PORTS;i++) {
         if (q->ce_m[i][j]) {
           free(q->ce_m[i][j]);
         }
@@ -183,11 +177,74 @@ void srslte_ue_dl_free(srslte_ue_dl_t *q) {
   }
 }
 
+int srslte_ue_dl_set_cell(srslte_ue_dl_t *q, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q               != NULL             &&
+      srslte_cell_isvalid(&cell))
+  {
+    q->pkt_errors = 0;
+    q->pkts_total = 0;
+    q->pending_ul_dci_rnti = 0;
+    q->sample_offset = 0;
+
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      if (q->cell.nof_prb != 0) {
+        srslte_regs_free(&q->regs);
+      }
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+      if (srslte_regs_init(&q->regs, q->cell)) {
+        fprintf(stderr, "Error resizing REGs\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_cfo_resize(&q->sfo_correct, q->cell.nof_prb*SRSLTE_NRE)) {
+        fprintf(stderr, "Error resizing SFO correct\n");
+        return SRSLTE_ERROR;
+      }
+      srslte_cfo_set_tol(&q->sfo_correct, 1e-5/q->fft.symbol_sz);
+      if (srslte_ofdm_rx_set_prb(&q->fft, q->cell.cp, q->cell.nof_prb)) {
+        fprintf(stderr, "Error resizing FFT\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_chest_dl_set_cell(&q->chest, q->cell)) {
+        fprintf(stderr, "Error resizing channel estimator\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_pcfich_set_cell(&q->pcfich, &q->regs, q->cell)) {
+        fprintf(stderr, "Error resizing PCFICH object\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_phich_set_cell(&q->phich, &q->regs, q->cell)) {
+        fprintf(stderr, "Error resizing PHICH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pdcch_set_cell(&q->pdcch, &q->regs, q->cell)) {
+        fprintf(stderr, "Error resizing PDCCH object\n");
+        return SRSLTE_ERROR;
+      }
+
+      if (srslte_pdsch_set_cell(&q->pdsch, q->cell)) {
+        fprintf(stderr, "Error creating PDSCH object\n");
+        return SRSLTE_ERROR;
+      }
+      q->current_rnti = 0;
+    }
+    ret = SRSLTE_SUCCESS;
+  } else {
+    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
+            cell.id, cell.nof_ports, cell.nof_prb);
+  }
+  return ret;
+}
+
 /* Precalculate the PDSCH scramble sequences for a given RNTI. This function takes a while 
  * to execute, so shall be called once the final C-RNTI has been allocated for the session.
  * For the connection procedure, use srslte_pusch_encode_rnti() or srslte_pusch_decode_rnti() functions 
  */
 void srslte_ue_dl_set_rnti(srslte_ue_dl_t *q, uint16_t rnti) {
+
   srslte_pdsch_set_rnti(&q->pdsch, rnti);
   
   // Compute UE-specific and Common search space for this RNTI
@@ -235,7 +292,7 @@ int srslte_ue_dl_decode_fft_estimate(srslte_ue_dl_t *q, cf_t *input[SRSLTE_MAX_P
       /* Correct SFO multiplying by complex exponential in the time domain */
       if (q->sample_offset) {
         for (int i=0;i<2*SRSLTE_CP_NSYMB(q->cell.cp);i++) {
-          srslte_cfo_correct(&q->sfo_correct, 
+          srslte_cfo_correct(&q->sfo_correct,
                           &q->sf_symbols_m[j][i*q->cell.nof_prb*SRSLTE_NRE], 
                           &q->sf_symbols_m[j][i*q->cell.nof_prb*SRSLTE_NRE], 
                           q->sample_offset / q->fft.symbol_sz);
@@ -739,11 +796,11 @@ bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t n_pr
 }
 
 void srslte_ue_dl_save_signal(srslte_ue_dl_t *q, srslte_softbuffer_rx_t *softbuffer, uint32_t tti, uint32_t rv_idx, uint16_t rnti, uint32_t cfi) {
-  srslte_vec_save_file("sf_symbols", q->sf_symbols_m, SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
+  srslte_vec_save_file("sf_symbols", q->sf_symbols, SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
   printf("%d samples\n", SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp));
-  srslte_vec_save_file("ce0", q->ce_m[0], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
+  srslte_vec_save_file("ce0", q->ce[0], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
   if (q->cell.nof_ports > 1) {
-    srslte_vec_save_file("ce1", q->ce_m[1], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
+    srslte_vec_save_file("ce1", q->ce[1], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
   }
   srslte_vec_save_file("pcfich_ce0", q->pcfich.ce[0], q->pcfich.nof_symbols*sizeof(cf_t));
   srslte_vec_save_file("pcfich_ce1", q->pcfich.ce[1], q->pcfich.nof_symbols*sizeof(cf_t));
@@ -756,13 +813,13 @@ void srslte_ue_dl_save_signal(srslte_ue_dl_t *q, srslte_softbuffer_rx_t *softbuf
   srslte_vec_save_file("pdcch_symbols", q->pdcch.symbols[0], q->pdcch.nof_cce*36*sizeof(cf_t));
   srslte_vec_save_file("pdcch_eq_symbols", q->pdcch.d, q->pdcch.nof_cce*36*sizeof(cf_t));
   srslte_vec_save_file("pdcch_llr", q->pdcch.llr, q->pdcch.nof_cce*72*sizeof(float));
-  
+
   
   srslte_vec_save_file("pdsch_symbols", q->pdsch.d, q->pdsch_cfg.nbits[0].nof_re*sizeof(cf_t));
   srslte_vec_save_file("llr", q->pdsch.e, q->pdsch_cfg.nbits[0].nof_bits*sizeof(cf_t));
   int cb_len = q->pdsch_cfg.cb_segm[0].K1;
   for (int i=0;i<q->pdsch_cfg.cb_segm[0].C;i++) {
-    char tmpstr[64]; 
+    char tmpstr[64];
     snprintf(tmpstr,64,"rmout_%d.dat",i);
     srslte_vec_save_file(tmpstr, softbuffer->buffer_f[i], (3*cb_len+12)*sizeof(int16_t));  
   }

lib/src/phy/ue/ue_mib.c

@@ -36,45 +36,40 @@
 #include "srslte/phy/utils/vector.h"
 
 int srslte_ue_mib_init(srslte_ue_mib_t * q, 
-                       srslte_cell_t cell) 
+                       uint32_t max_prb)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
-  if (q != NULL && 
-      cell.nof_ports <= SRSLTE_MAX_PORTS) 
+  if (q != NULL)
   {
 
     ret = SRSLTE_ERROR;    
     bzero(q, sizeof(srslte_ue_mib_t));
     
-    if (srslte_pbch_init(&q->pbch, cell)) {
+    if (srslte_pbch_init(&q->pbch)) {
       fprintf(stderr, "Error initiating PBCH\n");
       goto clean_exit;
     }
 
-    if (cell.nof_ports == 0) {
-      cell.nof_ports = SRSLTE_MAX_PORTS; 
-    }
-    
-    q->sf_symbols = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
+    q->sf_symbols = srslte_vec_malloc(SRSLTE_SF_LEN_RE(max_prb, SRSLTE_CP_NORM) * sizeof(cf_t));
     if (!q->sf_symbols) {
       perror("malloc");
       goto clean_exit;
     }
     
-    for (int i=0;i<cell.nof_ports;i++) {
-      q->ce[i] = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
+    for (int i=0;i<SRSLTE_MAX_PORTS;i++) {
+      q->ce[i] = srslte_vec_malloc(SRSLTE_SF_LEN_RE(max_prb, SRSLTE_CP_NORM) * sizeof(cf_t));
       if (!q->ce[i]) {
         perror("malloc");
         goto clean_exit;
       }
     }
 
-    if (srslte_ofdm_rx_init(&q->fft, cell.cp, cell.nof_prb)) {
+    if (srslte_ofdm_rx_init(&q->fft, SRSLTE_CP_NORM, max_prb)) {
       fprintf(stderr, "Error initializing FFT\n");
       goto clean_exit;
     }
-    if (srslte_chest_dl_init(&q->chest, cell)) {
+    if (srslte_chest_dl_init(&q->chest, max_prb)) {
       fprintf(stderr, "Error initializing reference signal\n");
       goto clean_exit;
     }
@@ -109,6 +104,38 @@ void srslte_ue_mib_free(srslte_ue_mib_t * q)
     
 }
 
+int srslte_ue_mib_set_cell(srslte_ue_mib_t * q,
+                           srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q != NULL &&
+      cell.nof_ports <= SRSLTE_MAX_PORTS)
+  {
+    if (srslte_pbch_set_cell(&q->pbch, cell)) {
+      fprintf(stderr, "Error initiating PBCH\n");
+      return SRSLTE_ERROR;
+    }
+    if (srslte_ofdm_rx_set_prb(&q->fft, cell.cp, cell.nof_prb)) {
+      fprintf(stderr, "Error initializing FFT\n");
+      return SRSLTE_ERROR;
+    }
+
+    if (cell.nof_ports == 0) {
+      cell.nof_ports = SRSLTE_MAX_PORTS;
+    }
+
+    if (srslte_chest_dl_set_cell(&q->chest, cell)) {
+      fprintf(stderr, "Error initializing reference signal\n");
+      return SRSLTE_ERROR;
+    }
+    srslte_ue_mib_reset(q);
+
+    ret = SRSLTE_SUCCESS;
+  }
+  return ret;
+}
+
 
 void srslte_ue_mib_reset(srslte_ue_mib_t * q)
 {
@@ -142,7 +169,7 @@ int srslte_ue_mib_decode(srslte_ue_mib_t * q, cf_t *input,
 
   /* Decode PBCH */
   ret = srslte_pbch_decode(&q->pbch, &q->sf_symbols[SRSLTE_SLOT_LEN_RE(q->chest.cell.nof_prb, q->chest.cell.cp)], 
-                    ce_slot1, srslte_chest_dl_get_noise_estimate(&q->chest),
+                    ce_slot1, 0,
                     bch_payload, nof_tx_ports, sfn_offset);
   
 
@@ -161,27 +188,21 @@ int srslte_ue_mib_decode(srslte_ue_mib_t * q, cf_t *input,
   return ret;
 }
 
-int srslte_ue_mib_sync_init(srslte_ue_mib_sync_t *q, 
-                            uint32_t cell_id, 
-                            srslte_cp_t cp, 
-                            int (recv_callback)(void*, void*, uint32_t, srslte_timestamp_t*),                             
-                            void *stream_handler) 
+int srslte_ue_mib_sync_init_multi(srslte_ue_mib_sync_t *q, 
+                                  int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t*),
+                                  uint32_t nof_rx_antennas,
+                                  void *stream_handler) 
 {
-  srslte_cell_t cell; 
-  // If the ports are set to 0, ue_mib goes through 1, 2 and 4 ports to blindly detect nof_ports
-  cell.nof_ports = 0;  
-  cell.id = cell_id; 
-  cell.cp = cp; 
-  cell.nof_prb = SRSLTE_UE_MIB_NOF_PRB; 
-  
-  q->sf_buffer[0] = srslte_vec_malloc(3*sizeof(cf_t)*SRSLTE_SF_LEN_PRB(cell.nof_prb));
-  q->nof_rx_antennas = 1;
+  for (int i=0;i<nof_rx_antennas;i++) {
+    q->sf_buffer[i] = srslte_vec_malloc(3*sizeof(cf_t)*SRSLTE_SF_LEN_PRB(SRSLTE_UE_MIB_NOF_PRB));
+  }
+  q->nof_rx_antennas = nof_rx_antennas;
   
-  if (srslte_ue_mib_init(&q->ue_mib, cell)) {
+  if (srslte_ue_mib_init(&q->ue_mib, SRSLTE_UE_MIB_NOF_PRB)) {
     fprintf(stderr, "Error initiating ue_mib\n");
     return SRSLTE_ERROR;
   }
-  if (srslte_ue_sync_init(&q->ue_sync, cell, recv_callback, stream_handler)) {
+  if (srslte_ue_sync_init_multi(&q->ue_sync, SRSLTE_UE_MIB_NOF_PRB, false, recv_callback, nof_rx_antennas, stream_handler)) {
     fprintf(stderr, "Error initiating ue_sync\n");
     srslte_ue_mib_free(&q->ue_mib);
     return SRSLTE_ERROR;
@@ -190,38 +211,30 @@ int srslte_ue_mib_sync_init(srslte_ue_mib_sync_t *q,
   return SRSLTE_SUCCESS;
 }
 
-int srslte_ue_mib_sync_init_multi(srslte_ue_mib_sync_t *q, 
-                                  uint32_t cell_id, 
-                                  srslte_cp_t cp, 
-                                  int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t, srslte_timestamp_t*),                             
-                                  uint32_t nof_rx_antennas,
-                                  void *stream_handler) 
+int srslte_ue_mib_sync_set_cell(srslte_ue_mib_sync_t *q,
+                                uint32_t cell_id,
+                                srslte_cp_t cp)
 {
-  srslte_cell_t cell; 
+  srslte_cell_t cell;
   // If the ports are set to 0, ue_mib goes through 1, 2 and 4 ports to blindly detect nof_ports
-  cell.nof_ports = 0;  
-  cell.id = cell_id; 
-  cell.cp = cp; 
-  cell.nof_prb = SRSLTE_UE_MIB_NOF_PRB; 
-  
-  for (int i=0;i<nof_rx_antennas;i++) {
-    q->sf_buffer[i] = srslte_vec_malloc(3*sizeof(cf_t)*SRSLTE_SF_LEN_PRB(cell.nof_prb));
-  }
-  q->nof_rx_antennas = nof_rx_antennas;
-  
-  if (srslte_ue_mib_init(&q->ue_mib, cell)) {
+  cell.nof_ports = 0;
+  cell.id = cell_id;
+  cell.cp = cp;
+  cell.nof_prb = SRSLTE_UE_MIB_NOF_PRB;
+
+  if (srslte_ue_mib_set_cell(&q->ue_mib, cell)) {
     fprintf(stderr, "Error initiating ue_mib\n");
     return SRSLTE_ERROR;
   }
-  if (srslte_ue_sync_init_multi(&q->ue_sync, cell, recv_callback, nof_rx_antennas, stream_handler)) {
+  if (srslte_ue_sync_set_cell(&q->ue_sync, cell)) {
     fprintf(stderr, "Error initiating ue_sync\n");
     srslte_ue_mib_free(&q->ue_mib);
     return SRSLTE_ERROR;
   }
-  srslte_ue_sync_decode_sss_on_track(&q->ue_sync, true);
   return SRSLTE_SUCCESS;
 }
 
+
 void srslte_ue_mib_sync_free(srslte_ue_mib_sync_t *q) {
   for (int i=0;i<q->nof_rx_antennas;i++) {
     if (q->sf_buffer[i]) {
@@ -246,7 +259,9 @@ int srslte_ue_mib_sync_decode(srslte_ue_mib_sync_t * q,
   
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
   uint32_t nof_frames = 0; 
-  int mib_ret = SRSLTE_UE_MIB_NOTFOUND; 
+  int mib_ret = SRSLTE_UE_MIB_NOTFOUND;
+
+  srslte_ue_mib_sync_reset(q);
 
   if (q != NULL) 
   {

lib/src/phy/ue/ue_sync.c

@@ -29,6 +29,7 @@
 #include <strings.h>
 #include <assert.h>
 #include <unistd.h>
+#include <srslte/srslte.h>
 
 
 #include "srslte/phy/ue/ue_sync.h"
@@ -128,39 +129,41 @@ int recv_callback_multi_to_single(void *h, cf_t *x[SRSLTE_MAX_PORTS], uint32_t n
 }
 
 int srslte_ue_sync_init(srslte_ue_sync_t *q, 
-                 srslte_cell_t cell,
-                 int (recv_callback)(void*, void*, uint32_t,srslte_timestamp_t*),                 
-                 void *stream_handler) 
+                        uint32_t max_prb,
+                        bool search_cell,
+                        int (recv_callback)(void*, void*, uint32_t,srslte_timestamp_t*),
+                        void *stream_handler)
 {
-  int ret = srslte_ue_sync_init_multi(q, cell, recv_callback_multi_to_single, 1, (void*) q);
+  int ret = srslte_ue_sync_init_multi(q, max_prb, search_cell, recv_callback_multi_to_single, 1, (void*) q);
   q->recv_callback_single = recv_callback;
   q->stream_single = stream_handler;
   return ret; 
 }
 
 int srslte_ue_sync_init_multi(srslte_ue_sync_t *q, 
-                              srslte_cell_t cell,
+                              uint32_t max_prb,
+                              bool search_cell,
                               int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t,srslte_timestamp_t*),
                               uint32_t nof_rx_antennas,
                               void *stream_handler) 
 
 {
     
-    return srslte_ue_sync_init_multi_decim(q,  cell,recv_callback ,nof_rx_antennas,stream_handler,1); 
+    return srslte_ue_sync_init_multi_decim(q, max_prb,search_cell, recv_callback ,nof_rx_antennas,stream_handler,1);
 }
 
 int srslte_ue_sync_init_multi_decim(srslte_ue_sync_t *q, 
-                              srslte_cell_t cell,
-                              int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t,srslte_timestamp_t*),
-                              uint32_t nof_rx_antennas,
-                              void *stream_handler,
-                              int decimate) 
+                                    uint32_t max_prb,
+                                    bool search_cell,
+                                    int (recv_callback)(void*, cf_t*[SRSLTE_MAX_PORTS], uint32_t,srslte_timestamp_t*),
+                                    uint32_t nof_rx_antennas,
+                                    void *stream_handler,
+                                    int decimate)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
   
   if (q                                 != NULL && 
       stream_handler                    != NULL && 
-      srslte_nofprb_isvalid(cell.nof_prb)       &&
       nof_rx_antennas <= SRSLTE_MAX_PORTS       &&
       recv_callback                     != NULL)
   {
@@ -171,122 +174,182 @@ int srslte_ue_sync_init_multi_decim(srslte_ue_sync_t *q,
     q->stream = stream_handler;
     q->recv_callback = recv_callback;
     q->nof_rx_antennas = nof_rx_antennas;
-    q->cell = cell;
-    q->fft_size = srslte_symbol_sz(q->cell.nof_prb);
+    q->fft_size = srslte_symbol_sz(max_prb);
     q->sf_len = SRSLTE_SF_LEN(q->fft_size);
     q->file_mode = false; 
     q->correct_cfo = true; 
     q->agc_period = 0; 
     q->sample_offset_correct_period = DEFAULT_SAMPLE_OFFSET_CORRECT_PERIOD; 
     q->sfo_ema                      = DEFAULT_SFO_EMA_COEFF; 
-    
-    if (cell.id == 1000) {
+
+    q->max_prb = max_prb;
+
+    if (search_cell) {
       
       /* If the cell is unkown, we search PSS/SSS in 5 ms */
       q->nof_recv_sf = 5; 
 
-      q->decode_sss_on_track = true; 
-
     } else {
       
       /* If the cell is known, we work on a 1ms basis */
       q->nof_recv_sf = 1; 
 
-      q->decode_sss_on_track = true; 
     }
 
     q->frame_len = q->nof_recv_sf*q->sf_len;
     
-    if(q->fft_size < 700  && q->decimate)
-    {
+    if(q->fft_size < 700 && q->decimate) {
         q->decimate = 1;    
     }
-    
-  
+
     if(srslte_sync_init_decim(&q->sfind, q->frame_len, q->frame_len, q->fft_size,q->decimate)) {
       fprintf(stderr, "Error initiating sync find\n");
       goto clean_exit;
     }
-    if (cell.id == 1000) {
+    if (search_cell) {
       if(srslte_sync_init(&q->strack, q->frame_len, TRACK_FRAME_SIZE, q->fft_size)) {
         fprintf(stderr, "Error initiating sync track\n");
         goto clean_exit;
-      }      
+      }
     } else {
       if(srslte_sync_init(&q->strack, q->frame_len, SRSLTE_CP_LEN_NORM(1,q->fft_size), q->fft_size)) {
         fprintf(stderr, "Error initiating sync track\n");
         goto clean_exit;
       }
     }
-    
+
+    ret = SRSLTE_SUCCESS;
+  }
+
+clean_exit:
+  if (ret == SRSLTE_ERROR) {
+    srslte_ue_sync_free(q);
+  }
+  return ret;
+}
+
+uint32_t srslte_ue_sync_sf_len(srslte_ue_sync_t *q) {
+  return q->frame_len;
+}
+
+void srslte_ue_sync_free(srslte_ue_sync_t *q) {
+  if (q->do_agc) {
+    srslte_agc_free(&q->agc);
+  }
+  if (!q->file_mode) {
+    srslte_sync_free(&q->sfind);
+    srslte_sync_free(&q->strack);
+  } else {
+    srslte_filesource_free(&q->file_source);
+  }
+  bzero(q, sizeof(srslte_ue_sync_t));
+}
+
+
+int srslte_ue_sync_set_cell(srslte_ue_sync_t *q, srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q                                 != NULL &&
+      srslte_nofprb_isvalid(cell.nof_prb))
+  {
+    ret = SRSLTE_ERROR;
+
+    if (cell.nof_prb > q->max_prb) {
+      fprintf(stderr, "Error in ue_sync_set_cell(): cell.nof_prb must be lower than initialized\n");
+      return SRSLTE_ERROR;
+    }
+
+    memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+    q->fft_size = srslte_symbol_sz(q->cell.nof_prb);
+    q->sf_len = SRSLTE_SF_LEN(q->fft_size);
+    q->agc_period = 0;
+
+    if (cell.id == 1000) {
+
+      /* If the cell is unkown, we search PSS/SSS in 5 ms */
+      q->nof_recv_sf = 5;
+
+      q->decode_sss_on_track = true;
+
+    } else {
+
+      /* If the cell is known, we work on a 1ms basis */
+      q->nof_recv_sf = 1;
+
+      q->decode_sss_on_track = true;
+    }
+
+    q->frame_len = q->nof_recv_sf*q->sf_len;
+
+    if(q->fft_size < 700 && q->decimate) {
+      q->decimate = 1;
+    }
+
+    if(srslte_sync_resize(&q->sfind, q->frame_len, q->frame_len, q->fft_size)) {
+      fprintf(stderr, "Error initiating sync find\n");
+      return SRSLTE_ERROR;
+    }
+    if (cell.id == 1000) {
+      if(srslte_sync_resize(&q->strack, q->frame_len, TRACK_FRAME_SIZE, q->fft_size)) {
+        fprintf(stderr, "Error initiating sync track\n");
+        return SRSLTE_ERROR;
+      }
+    } else {
+      if(srslte_sync_resize(&q->strack, q->frame_len, SRSLTE_CP_LEN_NORM(1,q->fft_size), q->fft_size)) {
+        fprintf(stderr, "Error initiating sync track\n");
+        return SRSLTE_ERROR;
+      }
+    }
+
     if (cell.id == 1000) {
-      /* If the cell id is unknown, enable CP detection on find */ 
+      /* If the cell id is unknown, enable CP detection on find */
       // FIXME: CP detection not working very well. Not supporting Extended CP right now
-      srslte_sync_cp_en(&q->sfind, false);      
-      srslte_sync_cp_en(&q->strack, false); 
+      srslte_sync_cp_en(&q->sfind, false);
+      srslte_sync_cp_en(&q->strack, false);
 
       srslte_sync_set_cfo_ema_alpha(&q->sfind, 0.8);
       srslte_sync_set_cfo_ema_alpha(&q->strack, 0.1);
 
-      srslte_sync_cfo_i_detec_en(&q->sfind, false); 
+      srslte_sync_cfo_i_detec_en(&q->sfind, false);
 
-      q->nof_avg_find_frames = FIND_NOF_AVG_FRAMES; 
+      q->nof_avg_find_frames = FIND_NOF_AVG_FRAMES;
       srslte_sync_set_threshold(&q->sfind, 2.0);
       srslte_sync_set_threshold(&q->strack, 1.2);
-      
+
     } else {
       srslte_sync_set_N_id_2(&q->sfind, cell.id%3);
       srslte_sync_set_N_id_2(&q->strack, cell.id%3);
       q->sfind.cp = cell.cp;
       q->strack.cp = cell.cp;
-      srslte_sync_cp_en(&q->sfind, false);      
-      srslte_sync_cp_en(&q->strack, false);        
+      srslte_sync_cp_en(&q->sfind, false);
+      srslte_sync_cp_en(&q->strack, false);
+
+      srslte_sync_cfo_i_detec_en(&q->sfind, false);
 
-      srslte_sync_cfo_i_detec_en(&q->sfind, false); 
-      
       srslte_sync_set_cfo_ema_alpha(&q->sfind, 0.1);
       srslte_sync_set_cfo_ema_alpha(&q->strack, 0.1);
 
       /* In find phase and if the cell is known, do not average pss correlation
-       * because we only capture 1 subframe and do not know where the peak is. 
+       * because we only capture 1 subframe and do not know where the peak is.
        */
-      q->nof_avg_find_frames = 1; 
+      q->nof_avg_find_frames = 1;
       srslte_sync_set_em_alpha(&q->sfind, 1);
       srslte_sync_set_threshold(&q->sfind, 3.0);
-      
+
       srslte_sync_set_em_alpha(&q->strack, 0.2);
       srslte_sync_set_threshold(&q->strack, 1.2);
 
     }
-      
+
     srslte_ue_sync_reset(q);
-    
+
     ret = SRSLTE_SUCCESS;
   }
-  
-clean_exit:
-  if (ret == SRSLTE_ERROR) {
-    srslte_ue_sync_free(q);
-  }
-  return ret; 
-}
 
-uint32_t srslte_ue_sync_sf_len(srslte_ue_sync_t *q) {
-  return q->frame_len;
+  return ret;
 }
 
-void srslte_ue_sync_free(srslte_ue_sync_t *q) {
-  if (q->do_agc) {
-    srslte_agc_free(&q->agc);
-  }
-  if (!q->file_mode) {
-    srslte_sync_free(&q->sfind);
-    srslte_sync_free(&q->strack);    
-  } else {
-    srslte_filesource_free(&q->file_source);
-  }
-  bzero(q, sizeof(srslte_ue_sync_t));
-}
 
 void srslte_ue_sync_get_last_timestamp(srslte_ue_sync_t *q, srslte_timestamp_t *timestamp) {
   memcpy(timestamp, &q->last_timestamp, sizeof(srslte_timestamp_t));
@@ -317,6 +380,8 @@ void srslte_ue_sync_set_cfo(srslte_ue_sync_t *q, float cfo) {
   srslte_sync_set_cfo(&q->strack, cfo/15000);
 }
 
+void srslte_ue_sync_set_cfo_tol(srslte_ue_sync_t *q, float cfo_tol) {}
+
 float srslte_ue_sync_get_sfo(srslte_ue_sync_t *q) {
   return q->mean_sfo/5e-3;
 }
@@ -649,7 +714,7 @@ int srslte_ue_sync_zerocopy_multi(srslte_ue_sync_t *q, cf_t *input_buffer[SRSLTE
           } 
           if (q->correct_cfo) {
             for (int i=0;i<q->nof_rx_antennas;i++) {
-              srslte_cfo_correct(&q->sfind.cfocorr, 
+              srslte_cfo_correct(&q->strack.cfocorr,
                           input_buffer[i], 
                           input_buffer[i], 
                           -srslte_sync_get_cfo(&q->strack) / q->fft_size);                         

lib/src/phy/ue/ue_ul.c

@@ -36,22 +36,22 @@
 #define CURRENT_SLOTLEN_RE SRSLTE_SLOT_LEN_RE(q->cell.nof_prb, q->cell.cp)
 #define CURRENT_SFLEN_RE SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)
 
+#define MAX_SFLEN     SRSLTE_SF_LEN(srslte_symbol_sz(max_prb))
 
-int srslte_ue_ul_init(srslte_ue_ul_t *q, 
-                      srslte_cell_t cell) 
+#define DEFAULT_CFO_TOL   50.0 // Hz
+
+int srslte_ue_ul_init(srslte_ue_ul_t *q,
+                      uint32_t max_prb)
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS; 
   
-  if (q                 != NULL &&
-      srslte_cell_isvalid(&cell))   
+  if (q != NULL)
   {
     ret = SRSLTE_ERROR;
     
     bzero(q, sizeof(srslte_ue_ul_t));
     
-    q->cell = cell; 
-    
-    if (srslte_ofdm_tx_init(&q->fft, q->cell.cp, q->cell.nof_prb)) {
+    if (srslte_ofdm_tx_init(&q->fft, SRSLTE_CP_NORM, max_prb)) {
       fprintf(stderr, "Error initiating FFT\n");
       goto clean_exit;
     }
@@ -60,41 +60,41 @@ int srslte_ue_ul_init(srslte_ue_ul_t *q,
 
     q->normalize_en = false; 
 
-    if (srslte_cfo_init(&q->cfo, CURRENT_SFLEN)) {
+    if (srslte_cfo_init(&q->cfo, MAX_SFLEN)) {
       fprintf(stderr, "Error creating CFO object\n");
       goto clean_exit;
     }
-    
-    srslte_cfo_set_tol(&q->cfo, 0);
-    
-    if (srslte_pusch_init(&q->pusch, q->cell)) {
+
+    srslte_ue_ul_set_cfo_tol(q, DEFAULT_CFO_TOL);
+
+    if (srslte_pusch_init_ue(&q->pusch, max_prb)) {
       fprintf(stderr, "Error creating PUSCH object\n");
       goto clean_exit;
     }
-    if (srslte_pucch_init(&q->pucch, q->cell)) {
+    if (srslte_pucch_init(&q->pucch)) {
       fprintf(stderr, "Error creating PUSCH object\n");
       goto clean_exit;
     }
-    if (srslte_softbuffer_tx_init(&q->softbuffer, q->cell.nof_prb)) {
+    if (srslte_softbuffer_tx_init(&q->softbuffer, max_prb)) {
       fprintf(stderr, "Error initiating soft buffer\n");
       goto clean_exit;
     }
-    if (srslte_refsignal_ul_init(&q->signals, cell)) {
+    if (srslte_refsignal_ul_init(&q->signals, max_prb)) {
       fprintf(stderr, "Error initiating srslte_refsignal_ul\n");
       goto clean_exit;
     }
-    q->sf_symbols = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
+    q->sf_symbols = srslte_vec_malloc(SRSLTE_SF_LEN_PRB(max_prb) * sizeof(cf_t));
     if (!q->sf_symbols) {
       perror("malloc");
       goto clean_exit; 
     }
-    q->refsignal = srslte_vec_malloc(2 * SRSLTE_NRE * q->cell.nof_prb * sizeof(cf_t));
+    q->refsignal = srslte_vec_malloc(2 * SRSLTE_NRE * max_prb * sizeof(cf_t));
     if (!q->refsignal) {
       perror("malloc");
       goto clean_exit; 
     }
     
-    q->srs_signal = srslte_vec_malloc(SRSLTE_NRE * q->cell.nof_prb * sizeof(cf_t));
+    q->srs_signal = srslte_vec_malloc(SRSLTE_NRE * max_prb * sizeof(cf_t));
     if (!q->srs_signal) {
       perror("malloc");
       goto clean_exit; 
@@ -102,8 +102,7 @@ int srslte_ue_ul_init(srslte_ue_ul_t *q,
     q->signals_pregenerated = false; 
     ret = SRSLTE_SUCCESS;
   } else {
-    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
-            cell.id, cell.nof_ports, cell.nof_prb);      
+    fprintf(stderr, "Invalid parameters\n");
   }
 
 clean_exit: 
@@ -115,7 +114,7 @@ clean_exit:
 
 void srslte_ue_ul_free(srslte_ue_ul_t *q) {
   if (q) {
-    srslte_ofdm_rx_free(&q->fft);
+    srslte_ofdm_tx_free(&q->fft);
     srslte_pusch_free(&q->pusch);
     srslte_pucch_free(&q->pucch);
     srslte_softbuffer_tx_free(&q->softbuffer);
@@ -140,6 +139,54 @@ void srslte_ue_ul_free(srslte_ue_ul_t *q) {
   }
 }
 
+int srslte_ue_ul_set_cell(srslte_ue_ul_t *q,
+                          srslte_cell_t cell)
+{
+  int ret = SRSLTE_ERROR_INVALID_INPUTS;
+
+  if (q != NULL && srslte_cell_isvalid(&cell))
+  {
+    if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
+      memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
+
+      if (srslte_ofdm_tx_set_prb(&q->fft, q->cell.cp, q->cell.nof_prb)) {
+        fprintf(stderr, "Error resizing FFT\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_cfo_resize(&q->cfo, SRSLTE_SF_LEN_PRB(q->cell.nof_prb))) {
+        fprintf(stderr, "Error resizing CFO object\n");
+        return SRSLTE_ERROR;
+      }
+
+      srslte_ue_ul_set_cfo_tol(q, q->current_cfo_tol);
+
+      if (srslte_pusch_set_cell(&q->pusch, q->cell)) {
+        fprintf(stderr, "Error resizing PUSCH object\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_pucch_set_cell(&q->pucch, q->cell)) {
+        fprintf(stderr, "Error resizing PUSCH object\n");
+        return SRSLTE_ERROR;
+      }
+      if (srslte_refsignal_ul_set_cell(&q->signals, q->cell)) {
+        fprintf(stderr, "Error resizing srslte_refsignal_ul\n");
+        return SRSLTE_ERROR;
+      }
+      q->signals_pregenerated = false;
+    }
+    ret = SRSLTE_SUCCESS;
+  } else {
+    fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
+            cell.id, cell.nof_ports, cell.nof_prb);
+  }
+  return ret;
+}
+
+void srslte_ue_ul_set_cfo_tol(srslte_ue_ul_t *q, float tol) {
+  q->current_cfo_tol = tol;
+  srslte_cfo_set_tol(&q->cfo, tol/(15000.0*srslte_symbol_sz(q->cell.nof_prb)));
+}
+
 void srslte_ue_ul_set_cfo(srslte_ue_ul_t *q, float cur_cfo) {
   q->current_cfo = cur_cfo; 
 }
@@ -154,7 +201,7 @@ void srslte_ue_ul_set_normalization(srslte_ue_ul_t *q, bool enabled)
   q->normalize_en = enabled;
 }
 
-/* Precalculate the PDSCH scramble sequences for a given RNTI. This function takes a while 
+/* Precalculate the PUSCH scramble sequences for a given RNTI. This function takes a while
  * to execute, so shall be called once the final C-RNTI has been allocated for the session.
  * For the connection procedure, use srslte_pusch_encode_rnti() or srslte_pusch_decode_rnti() functions 
  */
@@ -303,7 +350,7 @@ int srslte_ue_ul_pucch_encode(srslte_ue_ul_t *q, srslte_uci_data_t uci_data,
     srslte_ofdm_tx_sf(&q->fft, q->sf_symbols, output_signal);
     
     if (q->cfo_en) {
-      srslte_cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / srslte_symbol_sz(q->cell.nof_prb));            
+      srslte_cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / srslte_symbol_sz(q->cell.nof_prb));
     }
     
     if (q->normalize_en) {
@@ -373,7 +420,7 @@ int srslte_ue_ul_srs_encode(srslte_ue_ul_t *q, uint32_t tti, cf_t *output_signal
     srslte_ofdm_tx_sf(&q->fft, q->sf_symbols, output_signal);
     
     if (q->cfo_en) {
-      srslte_cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / srslte_symbol_sz(q->cell.nof_prb));            
+      srslte_cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / srslte_symbol_sz(q->cell.nof_prb));
     }
     
     if (q->normalize_en) {
@@ -415,7 +462,7 @@ int srslte_ue_ul_pusch_encode_rnti_softbuffer(srslte_ue_ul_t *q,
                                              q->pusch_cfg.grant.n_prb_tilde, 
                                              q->sf_symbols);
     } else {
-   
+
       if (srslte_refsignal_dmrs_pusch_gen(&q->signals, q->pusch_cfg.grant.L_prb, 
                                           q->pusch_cfg.sf_idx,
                                           q->pusch_cfg.grant.ncs_dmrs,
@@ -442,7 +489,7 @@ int srslte_ue_ul_pusch_encode_rnti_softbuffer(srslte_ue_ul_t *q,
     srslte_ofdm_tx_sf(&q->fft, q->sf_symbols, output_signal);
     
     if (q->cfo_en) {
-      srslte_cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / srslte_symbol_sz(q->cell.nof_prb));            
+      srslte_cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / srslte_symbol_sz(q->cell.nof_prb));
     }
     
     if (q->normalize_en) {

lib/src/phy/utils/cexptab.c

@@ -36,7 +36,7 @@ int srslte_cexptab_init(srslte_cexptab_t *h, uint32_t size) {
   uint32_t i;
 
   h->size = size;
-  h->tab = malloc(sizeof(cf_t) * size);
+  h->tab = malloc(sizeof(cf_t) * (1+size));
   if (h->tab) {
     for (i = 0; i < size; i++) {
       h->tab[i] = cexpf(_Complex_I * 2 * M_PI * (float) i / size);

lib/src/phy/utils/convolution.c

@@ -27,6 +27,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <srslte/srslte.h>
 
 #include "srslte/phy/dft/dft.h"
 #include "srslte/phy/utils/vector.h"
@@ -34,14 +35,17 @@
 
 
 int srslte_conv_fft_cc_init(srslte_conv_fft_cc_t *q, uint32_t input_len, uint32_t filter_len) {
+  bzero(q, sizeof(srslte_conv_fft_cc_t));
+
   q->input_len = input_len;
   q->filter_len = filter_len;
   q->output_len = input_len+filter_len;
+  q->max_filter_len = filter_len;
+  q->max_input_len  = input_len;
   q->input_fft = srslte_vec_malloc(sizeof(cf_t)*q->output_len);
   q->filter_fft = srslte_vec_malloc(sizeof(cf_t)*q->output_len);
   q->output_fft = srslte_vec_malloc(sizeof(cf_t)*q->output_len);
-  
-  
+
   if (!q->input_fft || !q->filter_fft || !q->output_fft) {
     return SRSLTE_ERROR;
   }
@@ -64,6 +68,34 @@ int srslte_conv_fft_cc_init(srslte_conv_fft_cc_t *q, uint32_t input_len, uint32_
   return SRSLTE_SUCCESS;
 }
 
+int srslte_conv_fft_cc_replan(srslte_conv_fft_cc_t *q, uint32_t input_len, uint32_t filter_len) {
+  if (input_len > q->max_input_len || filter_len > q->max_filter_len) {
+    fprintf(stderr, "Error in conv_fft_cc_replan(): input_len and filter_len must be lower than initialized\n");
+    return -1;
+  }
+
+  q->input_len = input_len;
+  q->filter_len = filter_len;
+  q->output_len = input_len+filter_len;
+
+  if (!q->input_fft || !q->filter_fft || !q->output_fft) {
+    return SRSLTE_ERROR;
+  }
+  if (srslte_dft_replan(&q->input_plan,q->output_len)) {
+    fprintf(stderr, "Error initiating input plan\n");
+    return SRSLTE_ERROR;
+  }
+  if (srslte_dft_replan(&q->filter_plan,q->output_len)) {
+    fprintf(stderr, "Error initiating filter plan\n");
+    return SRSLTE_ERROR;
+  }
+  if (srslte_dft_replan(&q->output_plan,q->output_len)) {
+    fprintf(stderr, "Error initiating output plan\n");
+    return SRSLTE_ERROR;
+  }
+  return SRSLTE_SUCCESS;
+}
+
 void srslte_conv_fft_cc_free(srslte_conv_fft_cc_t *q) {
   if (q->input_fft) {
     free(q->input_fft);

lib/src/radio/radio.cc

@@ -47,7 +47,7 @@ bool radio::init(char *args, char *devname)
   cur_tx_srate = 0; 
   is_start_of_burst = true; 
   
-  // Suppress radio stdout 
+  // Suppress radio stdout
   srslte_rf_suppress_stdout(&rf_device);
   
   tx_adv_auto = true; 
@@ -250,9 +250,13 @@ void radio::save_trace(uint32_t is_eob, srslte_timestamp_t *tx_time) {
   }
 }
 
-void radio::set_rx_freq(float freq)
+void radio::set_freq_offset(double freq) {
+  freq_offset = freq;
+}
+
+void radio::set_rx_freq(double freq)
 {
-  rx_freq = srslte_rf_set_rx_freq(&rf_device, freq);
+  rx_freq = srslte_rf_set_rx_freq(&rf_device, freq+freq_offset);
 }
 
 void radio::set_rx_gain(float gain)
@@ -265,19 +269,19 @@ double radio::set_rx_gain_th(float gain)
   return srslte_rf_set_rx_gain_th(&rf_device, gain);
 }
 
-void radio::set_master_clock_rate(float rate)
+void radio::set_master_clock_rate(double rate)
 {
   srslte_rf_set_master_clock_rate(&rf_device, rate);
 }
 
-void radio::set_rx_srate(float srate)
+void radio::set_rx_srate(double srate)
 {
   srslte_rf_set_rx_srate(&rf_device, srate);
 }
 
-void radio::set_tx_freq(float freq)
+void radio::set_tx_freq(double freq)
 {
-  tx_freq = srslte_rf_set_tx_freq(&rf_device, freq);  
+  tx_freq = srslte_rf_set_tx_freq(&rf_device, freq+freq_offset);
 }
 
 void radio::set_tx_gain(float gain)
@@ -285,12 +289,12 @@ void radio::set_tx_gain(float gain)
   srslte_rf_set_tx_gain(&rf_device, gain);
 }
 
-float radio::get_rx_freq()
+double radio::get_rx_freq()
 {
   return rx_freq;
 }
 
-float radio::get_tx_freq()
+double radio::get_tx_freq()
 {
   return tx_freq; 
 }
@@ -305,7 +309,7 @@ float radio::get_rx_gain()
   return srslte_rf_get_rx_gain(&rf_device);
 }
 
-void radio::set_tx_srate(float srate)
+void radio::set_tx_srate(double srate)
 {
   cur_tx_srate = srslte_rf_set_tx_srate(&rf_device, srate);
   burst_preamble_samples = (uint32_t) (cur_tx_srate * burst_preamble_sec);
@@ -392,8 +396,6 @@ void radio::set_tx_srate(float srate)
   
   // Calculate TX advance in seconds from samples and sampling rate 
   tx_adv_sec = nsamples/cur_tx_srate;
-  
-  printf("Setting TX/RX offset %d samples, %.2f us\n", nsamples, tx_adv_sec*1e6);
 }
 
 void radio::start_rx()

lib/src/radio/radio_multi.cc

@@ -14,9 +14,11 @@ bool radio_multi::init_multi(uint32_t nof_rx_antennas, char* args, char* devname
   burst_preamble_samples = 0; 
   burst_preamble_time_rounded = 0; 
   cur_tx_srate = 0; 
-  is_start_of_burst = true; 
-  
-  
+  is_start_of_burst = true;
+
+  // Suppress radio stdout
+  srslte_rf_suppress_stdout(&rf_device);
+
   tx_adv_auto = true; 
   // Set default preamble length each known device
   // We distinguish by device family, maybe we should calibrate per device

lib/src/upper/gw.cc

@@ -42,13 +42,14 @@ namespace srslte {
 
 gw::gw()
   :if_up(false)
-{}
+{
+  current_ip_addr = 0;
+}
 
-void gw::init(srsue::pdcp_interface_gw *pdcp_, srsue::rrc_interface_gw *rrc_, srsue::ue_interface *ue_, log *gw_log_, uint32_t lcid_)
+void gw::init(srsue::pdcp_interface_gw *pdcp_, srsue::ue_interface *ue_, log *gw_log_, uint32_t lcid_)
 {
   pool    = byte_buffer_pool::get_instance();
   pdcp    = pdcp_;
-  rrc     = rrc_;
   ue      = ue_;
   gw_log  = gw_log_;
   lcid    = lcid_;
@@ -78,6 +79,8 @@ void gw::stop()
         thread_cancel();
       }
       wait_thread_finish();
+
+      current_ip_addr = 0;
     }
 
     // TODO: tear down TUN device?
@@ -127,38 +130,42 @@ void gw::write_pdu(uint32_t lcid, byte_buffer_t *pdu)
 *******************************************************************************/
 error_t gw::setup_if_addr(uint32_t ip_addr, char *err_str)
 {
-  if(!if_up)
-  {
+  if (ip_addr != current_ip_addr) {
+    if(!if_up)
+    {
       if(init_if(err_str))
       {
         gw_log->error("init_if failed\n");
         return(ERROR_CANT_START);
       }
-  }
+    }
 
-  // Setup the IP address
-  sock                                                   = socket(AF_INET, SOCK_DGRAM, 0);
-  ifr.ifr_addr.sa_family                                 = AF_INET;
-  ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr = htonl(ip_addr);
-  if(0 > ioctl(sock, SIOCSIFADDR, &ifr))
-  {
+    // Setup the IP address
+    sock                                                   = socket(AF_INET, SOCK_DGRAM, 0);
+    ifr.ifr_addr.sa_family                                 = AF_INET;
+    ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr = htonl(ip_addr);
+    if(0 > ioctl(sock, SIOCSIFADDR, &ifr))
+    {
       err_str = strerror(errno);
       gw_log->debug("Failed to set socket address: %s\n", err_str);
       close(tun_fd);
       return(ERROR_CANT_START);
-  }
-  ifr.ifr_netmask.sa_family                                 = AF_INET;
-  ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr = inet_addr("255.255.255.0");
-  if(0 > ioctl(sock, SIOCSIFNETMASK, &ifr))
-  {
+    }
+    ifr.ifr_netmask.sa_family                                 = AF_INET;
+    ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr = inet_addr("255.255.255.0");
+    if(0 > ioctl(sock, SIOCSIFNETMASK, &ifr))
+    {
       err_str = strerror(errno);
       gw_log->debug("Failed to set socket netmask: %s\n", err_str);
       close(tun_fd);
       return(ERROR_CANT_START);
-  }
+    }
+
+    current_ip_addr = ip_addr;
 
-  // Setup a thread to receive packets from the TUN device
-  start(GW_THREAD_PRIO);
+    // Setup a thread to receive packets from the TUN device
+    start(GW_THREAD_PRIO);
+  }
 
   return(ERROR_NONE);
 }
@@ -250,11 +257,6 @@ void gw::run_thread()
           {
             gw_log->info_hex(pdu->msg, pdu->N_bytes, "TX PDU");
 
-            while(run_enable && (!rrc->rrc_connected() || !rrc->have_drb())) {
-              rrc->rrc_connect();
-              usleep(1000);
-            }
-            
             if (!run_enable) {
               break;
             }

srsenb/hdr/enb.h

@@ -138,42 +138,53 @@ typedef struct {
   Main UE class
 *******************************************************************************/
 
+//#define LOG_STDOUT
+
 class enb
-    :public enb_metrics_interface
-{
+    :public enb_metrics_interface {
 public:
-  static enb* get_instance(void);
+  static enb *get_instance(void);
+
   static void cleanup(void);
 
   bool init(all_args_t *args_);
+
   void stop();
+
   void start_plot();
-  
+
   static void rf_msg(srslte_rf_error_t error);
+
   void handle_rf_msg(srslte_rf_error_t error);
 
   // eNodeB metrics interface
   bool get_metrics(enb_metrics_t &m);
 
   void pregenerate_signals(bool enable);
-  
+
 
 private:
   static enb *instance;
+
   enb();
+
   virtual ~enb();
 
-  srslte::radio      radio;
-  srsenb::phy        phy;
-  srsenb::mac        mac;
-  srslte::mac_pcap   mac_pcap;
-  srsenb::rlc        rlc;
-  srsenb::pdcp       pdcp;
-  srsenb::rrc        rrc;
-  srsenb::gtpu       gtpu;
-  srsenb::s1ap       s1ap;
-
-  srslte::logger_file logger;
+  srslte::radio radio;
+  srsenb::phy phy;
+  srsenb::mac mac;
+  srslte::mac_pcap mac_pcap;
+  srsenb::rlc rlc;
+  srsenb::pdcp pdcp;
+  srsenb::rrc rrc;
+  srsenb::gtpu gtpu;
+  srsenb::s1ap s1ap;
+
+#ifdef LOG_STDOUT
+    srslte::logger_stdout logger;
+#else
+    srslte::logger_file logger;
+#endif
   srslte::log_filter  rf_log;
   std::vector<void*>  phy_log;
   srslte::log_filter  mac_log;