adding phy_common_sl.{c,h}

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

@@ -27,7 +27,7 @@
 #include "srslte/config.h"
 #include "srslte/phy/ch_estimation/chest_common.h"
 #include "srslte/phy/ch_estimation/refsignal_ul.h"
-#include "srslte/phy/common/phy_common.h"
+#include "srslte/phy/common/phy_common_sl.h"
 #include "srslte/phy/resampling/interp.h"
 
 #define SRSLTE_SL_N_RU_SEQ (30)

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

@@ -340,67 +340,6 @@ typedef struct SRSLTE_API {
 #define SRSLTE_NBIOT_NPBCH_NOF_BITS_SF                                                                                 \
   (SRSLTE_NBIOT_NPBCH_NOF_TOTAL_BITS / 8) ///< The NPBCH is transmitted in 8 blocks (See 36.211 Sec 10.2.4.4)
 
-///< Sidelink
-typedef enum SRSLTE_API {
-  SRSLTE_SIDELINK_TM1 = 0,
-  SRSLTE_SIDELINK_TM2,
-  SRSLTE_SIDELINK_TM3,
-  SRSLTE_SIDELINK_TM4
-} srslte_sl_tm_t;
-
-typedef enum SRSLTE_API {
-  SRSLTE_SIDELINK_PSBCH = 0,
-  SRSLTE_SIDELINK_PSCCH,
-  SRSLTE_SIDELINK_PSSCH,
-  SRSLTE_SIDELINK_PSDCH
-} srslte_sl_channels_t;
-
-typedef enum SRSLTE_API {
-  SRSLTE_SIDELINK_DATA_SYMBOL = 0,
-  SRSLTE_SIDELINK_SYNC_SYMBOL,
-  SRSLTE_SIDELINK_DMRS_SYMBOL,
-  SRSLTE_SIDELINK_GUARD_SYMBOL
-} srslte_sl_symbol_t;
-
-typedef enum {
-  SRSLTE_SCI_FORMAT0 = 0,
-  SRSLTE_SCI_FORMAT1
-} srslte_sci_format_t;
-
-#define SRSLTE_PSBCH_NOF_PRB (6)
-#define SRSLTE_PSCCH_TM34_NOF_PRB (2)
-
-#define SRSLTE_MIB_SL_LEN (40)     // TM1/2: 40 bits
-#define SRSLTE_MIB_SL_V2X_LEN (48) // TM3/4: 48 bits
-#define SRSLTE_MIB_SL_MAX_LEN (SRSLTE_MIB_SL_V2X_LEN)
-
-#define SRSLTE_SL_TM12_DEFAULT_NUM_DMRS_SYMBOLS (2)
-#define SRSLTE_SL_TM34_DEFAULT_NUM_DMRS_SYMBOLS (4) ///< In TM3/4, all channels have 4 DMRS by default
-
-#define SRSLTE_PSBCH_TM12_NUM_DATA_SYMBOLS (8) ///< SL-BCH is in 8 OFDM symbols (but only 7 are tx'ed)
-#define SRSLTE_PSBCH_TM12_NUM_DMRS_SYMBOLS (2) ///< PSBCH has 2 DMRS symbols
-#define SRSLTE_PSBCH_TM12_NUM_SYNC_SYMBOLS (4) ///< Two symbols PSSS and two SSSS
-
-#define SRSLTE_PSBCH_TM34_NUM_DATA_SYMBOLS (7) ///< SL-BCH is in 7 OFDM symbols (but only 6 are tx'ed)
-#define SRSLTE_PSBCH_TM34_NUM_DMRS_SYMBOLS (3) ///< PSBCH has 3 DMRS symbols in TM3 and TM4
-#define SRSLTE_PSBCH_TM34_NUM_SYNC_SYMBOLS (4) ///< Two symbols PSSS and two SSSS
-
-#define SRSLTE_SCI_CRC_LEN (16)
-#define SRSLTE_SCI_MAX_LEN (45)
-#define SRSLTE_SCI_TM34_LEN (32)
-
-#define SRSLTE_PSCCH_QM 2
-#define SRSLTE_PSCCH_TM12_NOF_PRB (1)
-#define SRSLTE_PSCCH_TM34_NOF_PRB (2)
-#define SRSLTE_PSCCH_SCRAMBLING_SEED (510) ///< Scrambling seed for PSCCH is 510
-
-#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS (12)
-#define SRSLTE_PSCCH_TM12_NUM_DMRS_SYMBOLS (2)
-#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS_EXT (10)
-
-#define SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS (10)
-#define SRSLTE_PSCCH_TM34_NUM_DMRS_SYMBOLS (4)
-
 ///< PHY common function declarations
 
 SRSLTE_API bool srslte_cell_isvalid(srslte_cell_t* cell);
@@ -496,11 +435,6 @@ SRSLTE_API float srslte_band_fu_nbiot(uint32_t ul_earfcn, const float m_ul);
 
 SRSLTE_API char* srslte_nbiot_mode_string(srslte_nbiot_mode_t mode);
 
-SRSLTE_API int  srslte_sl_get_num_symbols(srslte_sl_tm_t tm, srslte_cp_t cp);
-SRSLTE_API bool srslte_psbch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i);
-SRSLTE_API bool srslte_pscch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp);
-SRSLTE_API uint32_t srslte_sci_format0_sizeof(uint32_t nof_prb);
-
 /**
  * Returns a constant string pointer with the ACK/NACK feedback mode
  *

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

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2013-2019 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsLTE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+
+/**********************************************************************************************
+ *  File:         phy_common_sl.h
+ *
+ *  Description:  Common parameters and lookup functions for Sidelink PHY
+ *
+ *  Reference:    3GPP TS 36.211 version 15.3.0 Release 15
+ *********************************************************************************************/
+
+#ifndef SRSLTE_PHY_COMMON_SL_H
+#define SRSLTE_PHY_COMMON_SL_H
+
+#include "phy_common.h"
+
+typedef enum SRSLTE_API {
+  SRSLTE_SIDELINK_TM1 = 0,
+  SRSLTE_SIDELINK_TM2,
+  SRSLTE_SIDELINK_TM3,
+  SRSLTE_SIDELINK_TM4
+} srslte_sl_tm_t;
+
+typedef enum SRSLTE_API {
+  SRSLTE_SIDELINK_PSBCH = 0,
+  SRSLTE_SIDELINK_PSCCH,
+  SRSLTE_SIDELINK_PSSCH,
+  SRSLTE_SIDELINK_PSDCH
+} srslte_sl_channels_t;
+
+typedef struct SRSLTE_API {
+  srslte_sl_tm_t mode;
+  uint32_t       nof_prb;
+  uint32_t       nof_ports;
+  uint32_t       id;
+  srslte_cp_t    cp;
+} srslte_cell_sl_t;
+
+typedef enum SRSLTE_API {
+  SRSLTE_SIDELINK_DATA_SYMBOL = 0,
+  SRSLTE_SIDELINK_SYNC_SYMBOL,
+  SRSLTE_SIDELINK_DMRS_SYMBOL,
+  SRSLTE_SIDELINK_GUARD_SYMBOL
+} srslte_sl_symbol_t;
+
+#define SRSLTE_PSBCH_NOF_PRB (6)
+#define SRSLTE_PSCCH_TM34_NOF_PRB (2)
+
+#define SRSLTE_MIB_SL_LEN (40)     // TM1/2: 40 bits
+#define SRSLTE_MIB_SL_V2X_LEN (48) // TM3/4: 48 bits
+#define SRSLTE_MIB_SL_MAX_LEN (SRSLTE_MIB_SL_V2X_LEN)
+
+#define SRSLTE_SL_TM12_DEFAULT_NUM_DMRS_SYMBOLS (2)
+#define SRSLTE_SL_TM34_DEFAULT_NUM_DMRS_SYMBOLS (4) ///< In TM3/4, all channels have 4 DMRS by default
+
+#define SRSLTE_PSBCH_TM12_NUM_DATA_SYMBOLS (8) ///< SL-BCH is in 8 OFDM symbols (but only 7 are tx'ed)
+#define SRSLTE_PSBCH_TM12_NUM_DMRS_SYMBOLS (2) ///< PSBCH has 2 DMRS symbols
+#define SRSLTE_PSBCH_TM12_NUM_SYNC_SYMBOLS (4) ///< Two symbols PSSS and two SSSS
+
+#define SRSLTE_PSBCH_TM34_NUM_DATA_SYMBOLS (7) ///< SL-BCH is in 7 OFDM symbols (but only 6 are tx'ed)
+#define SRSLTE_PSBCH_TM34_NUM_DMRS_SYMBOLS (3) ///< PSBCH has 3 DMRS symbols in TM3 and TM4
+#define SRSLTE_PSBCH_TM34_NUM_SYNC_SYMBOLS (4) ///< Two symbols PSSS and two SSSS
+
+#define SRSLTE_PSCCH_QM 2
+#define SRSLTE_PSCCH_TM12_NOF_PRB (1)
+#define SRSLTE_PSCCH_TM34_NOF_PRB (2)
+#define SRSLTE_PSCCH_SCRAMBLING_SEED (510) ///< Scrambling seed for PSCCH is 510
+
+#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS (12)
+#define SRSLTE_PSCCH_TM12_NUM_DMRS_SYMBOLS (2)
+#define SRSLTE_PSCCH_TM12_NUM_DATA_SYMBOLS_EXT (10)
+
+#define SRSLTE_PSCCH_TM34_NUM_DATA_SYMBOLS (10)
+#define SRSLTE_PSCCH_TM34_NUM_DMRS_SYMBOLS (4)
+
+SRSLTE_API int srslte_sl_get_num_symbols(srslte_sl_tm_t tm, srslte_cp_t cp);
+
+SRSLTE_API bool srslte_psbch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i);
+
+SRSLTE_API bool srslte_pscch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp);
+
+SRSLTE_API uint32_t srslte_sci_format0_sizeof(uint32_t nof_prb);
+
+#endif // SRSLTE_PHY_COMMON_SL_H

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

@@ -26,7 +26,7 @@
 #include <stdint.h>
 
 #include "srslte/config.h"
-#include "srslte/phy/common/phy_common.h"
+#include "srslte/phy/common/phy_common_sl.h"
 
 /**
  * Master information block - Sidelink (MIB-SL and MIB-SL-V2X).

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

@@ -22,6 +22,7 @@
 #ifndef SRSLTE_PSBCH_H
 #define SRSLTE_PSBCH_H
 
+#include <srslte/phy/common/phy_common_sl.h>
 #include <srslte/phy/dft/dft_precoding.h>
 #include <srslte/phy/fec/convcoder.h>
 #include <srslte/phy/fec/crc.h>

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

@@ -24,7 +24,7 @@
 
 #include <stdint.h>
 
-#include "srslte/phy/common/phy_common.h"
+#include "srslte/phy/common/phy_common_sl.h"
 #include "srslte/phy/common/sequence.h"
 #include "srslte/phy/dft/dft_precoding.h"
 #include "srslte/phy/fec/convcoder.h"

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

@@ -26,10 +26,16 @@
 #include <stdint.h>
 
 #include "srslte/config.h"
-#include "srslte/phy/common/phy_common.h"
+#include "srslte/phy/common/phy_common_sl.h"
 
 #define SRSLTE_SCI_MSG_MAX_LEN 80
 
+#define SRSLTE_SCI_CRC_LEN (16)
+#define SRSLTE_SCI_MAX_LEN (45)
+#define SRSLTE_SCI_TM34_LEN (32)
+
+typedef enum { SRSLTE_SCI_FORMAT0 = 0, SRSLTE_SCI_FORMAT1 } srslte_sci_format_t;
+
 /**
  * Sidelink Control Information - Sidelink (SCI0 and SCI1).
  *

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

@@ -34,7 +34,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-#include "srslte/phy/common/phy_common.h"
+#include "srslte/phy/common/phy_common_sl.h"
 #include "srslte/phy/dft/dft.h"
 
 #define SRSLTE_SSSS_NOF_SEQ 336

lib/src/phy/common/CMakeLists.txt

@@ -18,5 +18,5 @@
 # and at http://www.gnu.org/licenses/.
 #
 
-file(GLOB SOURCES "*.c")
+set(SOURCES phy_common.c phy_common_sl.c sequence.c timestamp.c)
 add_library(srslte_phy_common OBJECT ${SOURCES})

lib/src/phy/common/phy_common.c

@@ -813,68 +813,6 @@ char* srslte_nbiot_mode_string(srslte_nbiot_mode_t mode)
   }
 }
 
-///< Sidelink helpers
-int srslte_sl_get_num_symbols(srslte_sl_tm_t tm, srslte_cp_t cp)
-{
-  if (tm == SRSLTE_SIDELINK_TM1 || tm == SRSLTE_SIDELINK_TM2) {
-    if (cp == SRSLTE_CP_NORM) {
-      return SRSLTE_CP_NORM_SF_NSYMB;
-    } else {
-      return SRSLTE_CP_EXT_SF_NSYMB;
-    }
-  } else if (tm == SRSLTE_SIDELINK_TM3 || tm == SRSLTE_SIDELINK_TM4) {
-    if (cp == SRSLTE_CP_NORM) {
-      return SRSLTE_CP_NORM_SF_NSYMB;
-    } else {
-      ERROR("Invalid CP");
-      return SRSLTE_ERROR;
-    }
-  } else {
-    ERROR("Invalid TM");
-    return SRSLTE_ERROR;
-  }
-}
-
-///< Look-up tables for Sidelink channel symbols
-static const srslte_sl_symbol_t srslte_psbch_symbol_map_tm12[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
-
-static const srslte_sl_symbol_t srslte_psbch_symbol_map_tm34[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
-
-bool srslte_psbch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i)
-{
-  if (tm <= SRSLTE_SIDELINK_TM2) {
-    return srslte_psbch_symbol_map_tm12[i] == type;
-  } else {
-    return srslte_psbch_symbol_map_tm34[i] == type;
-  }
-}
-
 const char* srslte_ack_nack_feedback_mode_string(srslte_ack_nack_feedback_mode_t ack_nack_feedback_mode)
 {
   switch (ack_nack_feedback_mode) {
@@ -917,85 +855,3 @@ srslte_ack_nack_feedback_mode_t srslte_string_ack_nack_feedback_mode(const char*
   // Otherwise Normal
   return SRSLTE_PUCCH_ACK_NACK_FEEDBACK_MODE_NORMAL;
 }
-
-static const srslte_sl_symbol_t srslte_pscch_symbol_map_tm12[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
-
-static const srslte_sl_symbol_t srslte_pscch_symbol_map_tm12_ext[SRSLTE_CP_EXT_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                            SRSLTE_SIDELINK_GUARD_SYMBOL};
-
-static const srslte_sl_symbol_t srslte_pscch_symbol_map_tm34[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
-                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
-
-bool srslte_pscch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp)
-{
-  if (tm == SRSLTE_SIDELINK_TM1 || tm == SRSLTE_SIDELINK_TM2) {
-    if (cp == SRSLTE_CP_EXT) {
-      return srslte_pscch_symbol_map_tm12_ext[i] == type;
-    }
-    return srslte_pscch_symbol_map_tm12[i] == type;
-  } else if (tm == SRSLTE_SIDELINK_TM3 || tm == SRSLTE_SIDELINK_TM4) {
-    return srslte_pscch_symbol_map_tm34[i] == type;
-  }
-  return false;
-}
-
-uint32_t srslte_sci_format0_sizeof(uint32_t nof_prb)
-{
-  // 3GPP TS 36.212 5.4.3.1
-  uint32_t n = 0;
-
-  // Frequency hopping flag – 1 bit
-  n += 1;
-
-  // Resource block assignment and hopping resource allocation
-  n += (uint32_t)ceil(log((nof_prb * (nof_prb + 1)) / 2.0) / log(2));
-
-  // Time resource pattern – 7 bits
-  n += 7;
-
-  // Modulation and coding scheme – 5 bit
-  n += 5;
-
-  // Timing advance indication – 11 bits
-  n += 11;
-
-  // Group destination ID – 8 bits
-  n += 8;
-
-  return n;
-}

lib/src/phy/common/phy_common_sl.c

@@ -0,0 +1,141 @@
+/*
+ * Copyright 2013-2019 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsLTE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+
+#include "srslte/phy/common/phy_common_sl.h"
+#include "srslte/phy/utils/debug.h"
+
+int srslte_sl_get_num_symbols(srslte_sl_tm_t tm, srslte_cp_t cp)
+{
+  if (tm == SRSLTE_SIDELINK_TM1 || tm == SRSLTE_SIDELINK_TM2) {
+    if (cp == SRSLTE_CP_NORM) {
+      return SRSLTE_CP_NORM_SF_NSYMB;
+    } else {
+      return SRSLTE_CP_EXT_SF_NSYMB;
+    }
+  } else if (tm == SRSLTE_SIDELINK_TM3 || tm == SRSLTE_SIDELINK_TM4) {
+    if (cp == SRSLTE_CP_NORM) {
+      return SRSLTE_CP_NORM_SF_NSYMB;
+    } else {
+      ERROR("Invalid CP");
+      return SRSLTE_ERROR;
+    }
+  } else {
+    ERROR("Invalid TM");
+    return SRSLTE_ERROR;
+  }
+}
+
+///< Look-up tables for Sidelink channel symbols
+static const srslte_sl_symbol_t srslte_psbch_symbol_map_tm12[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
+
+static const srslte_sl_symbol_t srslte_psbch_symbol_map_tm34[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_SYNC_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
+
+bool srslte_psbch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i)
+{
+  if (tm <= SRSLTE_SIDELINK_TM2) {
+    return srslte_psbch_symbol_map_tm12[i] == type;
+  } else {
+    return srslte_psbch_symbol_map_tm34[i] == type;
+  }
+}
+
+static const srslte_sl_symbol_t srslte_pscch_symbol_map_tm12[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
+
+static const srslte_sl_symbol_t srslte_pscch_symbol_map_tm12_ext[SRSLTE_CP_EXT_SF_NSYMB] = {
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DMRS_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DMRS_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_DATA_SYMBOL,
+    SRSLTE_SIDELINK_GUARD_SYMBOL};
+
+static const srslte_sl_symbol_t srslte_pscch_symbol_map_tm34[SRSLTE_CP_NORM_SF_NSYMB] = {SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DMRS_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_DATA_SYMBOL,
+                                                                                         SRSLTE_SIDELINK_GUARD_SYMBOL};
+
+bool srslte_pscch_is_symbol(srslte_sl_symbol_t type, srslte_sl_tm_t tm, uint32_t i, srslte_cp_t cp)
+{
+  if (tm == SRSLTE_SIDELINK_TM1 || tm == SRSLTE_SIDELINK_TM2) {
+    if (cp == SRSLTE_CP_EXT) {
+      return srslte_pscch_symbol_map_tm12_ext[i] == type;
+    }
+    return srslte_pscch_symbol_map_tm12[i] == type;
+  } else if (tm == SRSLTE_SIDELINK_TM3 || tm == SRSLTE_SIDELINK_TM4) {
+    return srslte_pscch_symbol_map_tm34[i] == type;
+  }
+  return false;
+}

lib/src/phy/phch/pscch.c

@@ -21,16 +21,18 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <stdint.h>
 
-#include "srslte/phy/phch/pscch.h"
 #include "srslte/phy/fec/rm_conv.h"
-#include "srslte/phy/utils/bit.h"
-#include "srslte/phy/utils/debug.h"
-#include "srslte/phy/utils/vector.h"
 #include "srslte/phy/modem/demod_soft.h"
 #include "srslte/phy/modem/mod.h"
+#include "srslte/phy/phch/pscch.h"
 #include "srslte/phy/phch/sch.h"
+#include "srslte/phy/phch/sci.h"
 #include "srslte/phy/scrambling/scrambling.h"
+#include "srslte/phy/utils/bit.h"
+#include "srslte/phy/utils/debug.h"
+#include "srslte/phy/utils/vector.h"
 
 int srslte_pscch_init(srslte_pscch_t* q, uint32_t nof_prb, srslte_sl_tm_t tm, srslte_cp_t cp)
 {

lib/src/phy/phch/sci.c

@@ -168,3 +168,29 @@ void srslte_sci_free(srslte_sci_t* q)
     bzero(q, sizeof(srslte_sci_t));
   }
 }
+
+uint32_t srslte_sci_format0_sizeof(uint32_t nof_prb)
+{
+  // 3GPP TS 36.212 5.4.3.1
+  uint32_t n = 0;
+
+  // Frequency hopping flag – 1 bit
+  n += 1;
+
+  // Resource block assignment and hopping resource allocation
+  n += (uint32_t)ceil(log((nof_prb * (nof_prb + 1)) / 2.0) / log(2));
+
+  // Time resource pattern – 7 bits
+  n += 7;
+
+  // Modulation and coding scheme – 5 bit
+  n += 5;
+
+  // Timing advance indication – 11 bits
+  n += 11;
+
+  // Group destination ID – 8 bits
+  n += 8;
+
+  return n;
+}