Changed CFO EMA coefficients

matlab/tests/pdsch_decode_signal.m

@@ -1,4 +1,4 @@
-%enb=struct('NCellID',424,'NDLRB',100,'NSubframe',9,'CFI',2,'CyclicPrefix','Normal','CellRefP',2,'Ng','One','PHICHDuration','Normal','DuplexMode','FDD');
+enb=struct('NCellID',1,'NDLRB',50,'NSubframe',2,'CFI',2,'CyclicPrefix','Normal','CellRefP',1,'Ng','One','PHICHDuration','Normal','DuplexMode','FDD');
 
 RNTI=65535;
 
@@ -11,8 +11,8 @@ cec.InterpType = 'linear';             % 2D interpolation type
 cec.InterpWindow = 'Causal';        % Interpolation window type
 cec.InterpWinSize = 1;                % Interpolation window size  
 
-%subframe_rx=lteOFDMDemodulate(enb,inputSignal);
-subframe_rx=reshape(input,[],14);
+subframe_rx=lteOFDMDemodulate(enb,y);
+%subframe_rx=reshape(input,[],14);
 [hest,nest] = lteDLChannelEstimate(enb, cec, subframe_rx);    
     
 % Search PDCCH
@@ -30,7 +30,8 @@ if ~isempty(dci)
     % Get the PDSCH configuration from the DCI
     [pdsch, trblklen] = hPDSCHConfiguration(enb, dci, pdcch.RNTI);
     pdsch.NTurboDecIts = 10;
-    %pdsch.Modulation =  {'QPSK'};
+    pdsch.Modulation =  {'QPSK'};
+    pdsch.RV=0;
     %trblklen=75376;
     fprintf('PDSCH settings after DCI decoding:\n');
     disp(pdsch);
@@ -43,9 +44,9 @@ if ~isempty(dci)
     [dlschBits,pdschSymbols] = ltePDSCHDecode(enb, pdsch, pdschRx, pdschHest, nest);
     [sib1, crc] = lteDLSCHDecode(enb, pdsch, trblklen, dlschBits);
 
-    [dec2, data, pdschRx2, pdschSymbols2, e_bits] = srslte_pdsch(enb, pdsch, ... 
-                                                        trblklen, ...
-                                                        subframe_rx, hest, nest);
+    %[dec2, data, pdschRx2, pdschSymbols2, e_bits] = srslte_pdsch(enb, pdsch, ... 
+    %                                                    trblklen, ...
+    %                                                    subframe_rx, hest, nest);
 
     
     scatter(real(pdschSymbols{1}),imag(pdschSymbols{1}))

srslte/examples/pdsch_ue.c

@@ -506,6 +506,7 @@ int main(int argc, char **argv) {
               // RV for SIB1 is predefined
               uint32_t k  = (sfn/2)%4; 
               uint32_t rv = ((uint32_t) ceilf((float)1.5*k))%4;
+              
               n = srslte_ue_dl_decode_rnti_rv(&ue_dl, &sf_buffer[prog_args.time_offset], data, 
                                               srslte_ue_sync_get_sfidx(&ue_sync), 
                                               SRSLTE_SIRNTI, rv);      

srslte/lib/ue/src/ue_dl.c

@@ -449,6 +449,7 @@ 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) {
   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[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[1], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));

srslte/lib/ue/src/ue_sync.c

@@ -194,8 +194,8 @@ int srslte_ue_sync_init(srslte_ue_sync_t *q,
 
       srslte_sync_cfo_i_detec_en(&q->sfind, false); 
       
-      srslte_sync_set_cfo_ema_alpha(&q->sfind, 0.01);
-      srslte_sync_set_cfo_ema_alpha(&q->strack, 0.01);
+      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.