fix sync bug

openair1/PHY/MODULATION/modulation_UE.h

@@ -59,6 +59,8 @@ int nr_slot_fep_init_sync(PHY_VARS_NR_UE *ue,
                           unsigned char Ns,
                           int sample_offset);
 
+uint cal_amp(int16_t *dataIn, int len);
+
 int slot_fep_mbsfn(PHY_VARS_UE *phy_vars_ue,
                    unsigned char l,
                    int subframe,

openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c

@@ -646,6 +646,12 @@ int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
       LOG_D(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d: LLR Computation  %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
 
 // Please keep it: useful for debugging
+   if ((pilots == 0) && (type == SI_PDSCH))
+   {
+     uint pdsch_amp;
+     pdsch_amp = cal_amp((int16_t *)&pdsch_vars[gNB_id]->rxdataF_ext[0][symbol *nb_rb_pdsch * 12 ], nb_rb_pdsch * 12);
+     LOG_I(PHY, "frame %d %d, SIB symbol %d pdsch_amp %d, rb %d\n", frame, nr_slot_rx, symbol, pdsch_amp, nb_rb_pdsch);
+   }
 #ifdef DEBUG_PDSCH_RX
   char filename[40];
   uint8_t aa = 0;

openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c

@@ -236,6 +236,8 @@ int nr_initial_sync(UE_nr_rxtx_proc_t *proc,
     /* process pss search on received buffer */
     sync_pos = pss_synchro_nr(ue, is, NO_RATE_CHANGE);
 
+    if (sync_pos < 0)
+        continue;
     if (sync_pos >= fp->nb_prefix_samples)
       ue->ssb_offset = sync_pos - fp->nb_prefix_samples;
     else

openair1/PHY/NR_UE_TRANSPORT/pss_nr.c

@@ -943,17 +943,20 @@ int pss_search_time_nr(int **rxdata, ///rx data in time domain
   }
 
   // computing absolute value of frequency offset
-  *f_off = ffo_est*frame_parms->subcarrier_spacing;  
 
   for (int pss_index = 0; pss_index < NUMBER_PSS_SEQUENCE; pss_index++) avg[pss_index]/=(length/4);
 
   *eNB_id = pss_source;
 
-  LOG_I(PHY,"[UE] nr_synchro_time: Sync source = %d, Peak found at pos %d, val = %llu (%d dB) avg %d dB, ffo %lf\n", pss_source, peak_position, (unsigned long long)peak_value, dB_fixed64(peak_value),dB_fixed64(avg[pss_source]),ffo_est);
+  //LOG_I(PHY,"[UE] nr_synchro_time: Sync source = %d, Peak found at pos %d, val = %llu (%d dB) avg %d dB, ffo %lf\n", pss_source, peak_position, (unsigned long long)peak_value, dB_fixed64(peak_value),dB_fixed64(avg[pss_source]),ffo_est);
 
   if (peak_value < 5*avg[pss_source])
+  {
+    LOG_I(PHY,"[UE] %d nr_synchro_time invalid: Sync source = %d, Peak found at pos %d, val = %llu (%d dB) avg %llu (%d dB), ffo %lf, %d hz\n", is, pss_source, peak_position, (unsigned long long)peak_value, dB_fixed64(peak_value), (unsigned long long)avg[pss_source], dB_fixed64(avg[pss_source]),ffo_est, *f_off);
     return(-1);
-
+  }
+    *f_off = ffo_est*frame_parms->subcarrier_spacing;  
+    LOG_I(PHY,"[UE] %d nr_synchro_time valid: Sync source = %d, Peak found at pos %d, val = %llu (%d dB) avg %llu (%d dB), ffo %lf, %d hz\n", is, pss_source, peak_position, (unsigned long long)peak_value, dB_fixed64(peak_value), (unsigned long long)avg[pss_source], dB_fixed64(avg[pss_source]),ffo_est, *f_off);
 
 #ifdef DBG_PSS_NR