nr-ip-over-lte: Apply modifications on time tracking

executables/nr-ue.c

@@ -653,12 +653,12 @@ void *UE_thread(void *arg) {
     //LOG_I(PHY,"Process slot %d thread Idx %d total gain %d\n", slot_nr, thread_idx, UE->rx_total_gain_dB);
 
 #ifdef OAI_ADRV9371_ZC706
-    uint32_t total_gain_dB_prev = 0;
+    /*uint32_t total_gain_dB_prev = 0;
     if (total_gain_dB_prev != UE->rx_total_gain_dB) {
 		total_gain_dB_prev = UE->rx_total_gain_dB;
-        openair0_cfg[0].rx_gain[0] = UE->rx_total_gain_dB-20;
+        openair0_cfg[0].rx_gain[0] = UE->rx_total_gain_dB;
         UE->rfdevice.trx_set_gains_func(&UE->rfdevice,&openair0_cfg[0]);
-    }
+    }*/
 #endif
 
     for (int i=0; i<UE->frame_parms.nb_antennas_rx; i++)

openair1/PHY/INIT/nr_init_ue.c

@@ -877,6 +877,7 @@ int init_nr_ue_signal(PHY_VARS_NR_UE *ue,
       pbch_vars[eNB_id]->rxdataF_comp        = (int32_t **)malloc16_clear( 8*sizeof(int32_t *) );
       pbch_vars[eNB_id]->dl_ch_estimates     = (int32_t **)malloc16_clear( 8*sizeof(int32_t *) );
       pbch_vars[eNB_id]->dl_ch_estimates_ext = (int32_t **)malloc16_clear( 8*sizeof(int32_t *) );
+      pbch_vars[eNB_id]->dl_ch_estimates_time = (int32_t **)malloc16_clear( 8*sizeof(int32_t *) );
       pbch_vars[eNB_id]->llr                 = (int16_t *)malloc16_clear( 1920 ); //
       prach_vars[eNB_id]->prachF             = (int16_t *)malloc16_clear( sizeof(int)*(7*2*sizeof(int)*(fp->ofdm_symbol_size*12)) );
       prach_vars[eNB_id]->prach              = (int16_t *)malloc16_clear( sizeof(int)*(7*2*sizeof(int)*(fp->ofdm_symbol_size*12)) );
@@ -888,6 +889,7 @@ int init_nr_ue_signal(PHY_VARS_NR_UE *ue,
           int idx = (j<<1)+i;
           pbch_vars[eNB_id]->rxdataF_comp[idx]        = (int32_t *)malloc16_clear( sizeof(int32_t)*20*12*4 );
           pbch_vars[eNB_id]->dl_ch_estimates[idx]     = (int32_t *)malloc16_clear( sizeof(int32_t)*7*2*sizeof(int)*(fp->ofdm_symbol_size) );
+          pbch_vars[eNB_id]->dl_ch_estimates_time[idx]= (int32_t *)malloc16_clear( sizeof(int32_t)*7*2*sizeof(int)*(fp->ofdm_symbol_size) );
           pbch_vars[eNB_id]->dl_ch_estimates_ext[idx] = (int32_t *)malloc16_clear( sizeof(int32_t)*20*12*4 );
         }
       }

openair1/PHY/NR_UE_ESTIMATION/nr_adjust_synch_ue.c

@@ -60,8 +60,8 @@ void nr_adjust_synch_ue(NR_DL_FRAME_PARMS *frame_parms,
     temp = 0;
 
     for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
-      Re = ((int16_t*)ue->pdcch_vars[ue->current_thread_id[subframe]][eNB_id]->dl_ch_estimates_time[aa])[(i<<1)];
-      Im = ((int16_t*)ue->pdcch_vars[ue->current_thread_id[subframe]][eNB_id]->dl_ch_estimates_time[aa])[1+(i<<1)];
+      Re = ((int16_t*)ue->pbch_vars[eNB_id]->dl_ch_estimates_time[aa])[(i<<1)];
+      Im = ((int16_t*)ue->pbch_vars[eNB_id]->dl_ch_estimates_time[aa])[1+(i<<1)];
       temp += (Re*Re/2) + (Im*Im/2);
     }
 
@@ -80,7 +80,7 @@ void nr_adjust_synch_ue(NR_DL_FRAME_PARMS *frame_parms,
   // do not filter to have proactive timing adjustment
   //max_pos_fil = max_pos;
 
-  if(subframe == 1)
+  if(subframe == 0)
   {
       diff = max_pos_fil - (frame_parms->nb_prefix_samples>>3);
 

openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c

@@ -21,7 +21,7 @@
 
 
 #include <string.h>
-
+#include "SCHED_NR_UE/defs.h"
 #include "nr_estimation.h"
 #include "PHY/NR_REFSIG/refsig_defs_ue.h"
 #include "filt16a_32.h"
@@ -207,11 +207,15 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
 			       uint8_t n_hf)
 {
   int pilot[200] __attribute__((aligned(16)));
-  unsigned char aarx;
+  unsigned char aarx,p;
   unsigned short k;
   unsigned int pilot_cnt;
   int16_t ch[2],*pil,*rxF,*dl_ch,*fl,*fm,*fr;
   int ch_offset,symbol_offset;
+  int slot_pbch;
+  fapi_nr_pbch_config_t *pbch_config = &ue->nrUE_config.pbch_config;
+  // initialized to 5ms in nr_init_ue for scenarios where UE is not configured (otherwise acquired by cell configuration from gNB or LTE)
+  uint8_t ssb_periodicity = 10;// ue->ssb_periodicity;
 
   //uint16_t Nid_cell = (eNB_offset == 0) ? ue->frame_parms.Nid_cell : ue->measurements.adj_cell_id[eNB_offset-1];
 
@@ -418,6 +422,59 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
 
     }
 
+    void (*idft)(int16_t *,int16_t *, int);
+
+    switch (ue->frame_parms.ofdm_symbol_size) {
+    case 128:
+      idft = idft128;
+      break;
+
+    case 256:
+      idft = idft256;
+      break;
+
+    case 512:
+      idft = idft512;
+      break;
+
+    case 1024:
+      idft = idft1024;
+      break;
+
+    case 1536:
+      idft = idft1536;
+      break;
+
+    case 2048:
+      idft = idft2048;
+      break;
+
+    case 3072:
+      idft = idft3072;
+      break;
+
+    case 4096:
+      idft = idft4096;
+      break;
+
+    default:
+      printf("unsupported ofdm symbol size \n");
+      assert(0);
+    }
+
+    if( symbol == 3)
+    {
+        // do ifft of channel estimate
+        for (aarx=0; aarx<ue->frame_parms.nb_antennas_rx; aarx++)
+            for (p=0; p<ue->frame_parms.nb_antenna_ports_eNB; p++) {
+                if (ue->pbch_vars[eNB_offset]->dl_ch_estimates[(p<<1)+aarx])
+                {
+  		LOG_D(PHY,"Channel Impulse Computation Slot %d ThreadId %d Symbol %d ch_offset %d\n", Ns, ue->current_thread_id[Ns], symbol, ch_offset);
+  		idft((int16_t*) &ue->pbch_vars[eNB_offset]->dl_ch_estimates[(p<<1)+aarx][ch_offset],
+  		     (int16_t*) ue->pbch_vars[eNB_offset]->dl_ch_estimates_time[(p<<1)+aarx],1);
+                }
+            }
+    }
 
     //}
 
@@ -433,7 +490,7 @@ int nr_pdcch_channel_estimation(PHY_VARS_NR_UE *ue,
 				unsigned short nb_rb_coreset)
 {
   int pilot[200] __attribute__((aligned(16)));
-  unsigned char aarx,p;
+  unsigned char aarx;
   unsigned short k;
   unsigned int pilot_cnt;
   int16_t ch[2],*pil,*rxF,*dl_ch,*fl,*fm,*fr;
@@ -597,60 +654,6 @@ int nr_pdcch_channel_estimation(PHY_VARS_NR_UE *ue,
       //}
 
   }
-  
-  void (*idft)(int16_t *,int16_t *, int);
-
-  switch (ue->frame_parms.ofdm_symbol_size) {
-  case 128:
-    idft = idft128;
-    break;
-
-  case 256:
-    idft = idft256;
-    break;
-
-  case 512:
-    idft = idft512;
-    break;
-
-  case 1024:
-    idft = idft1024;
-    break;
-
-  case 1536:
-    idft = idft1536;
-    break;
-
-  case 2048:
-    idft = idft2048;
-    break;
-
-  case 3072:
-    idft = idft3072;
-    break;
-
-  case 4096:
-    idft = idft4096;
-    break;
-
-  default:
-    printf("unsupported ofdm symbol size \n");
-    assert(0);
-  }
-
-  if( (Ns== 1) && (symbol == 0))
-  {
-      // do ifft of channel estimate
-      for (aarx=0; aarx<ue->frame_parms.nb_antennas_rx; aarx++)
-          for (p=0; p<ue->frame_parms.nb_antenna_ports_eNB; p++) {
-              if (ue->pdcch_vars[ue->current_thread_id[Ns]][eNB_offset]->dl_ch_estimates[(p<<1)+aarx])
-              {
-		LOG_D(PHY,"Channel Impulse Computation Slot %d ThreadId %d Symbol %d \n", Ns, ue->current_thread_id[Ns], symbol);
-		idft((int16_t*) &ue->pdcch_vars[ue->current_thread_id[Ns]][eNB_offset]->dl_ch_estimates[(p<<1)+aarx][0],
-		     (int16_t*) ue->pdcch_vars[ue->current_thread_id[Ns]][eNB_offset]->dl_ch_estimates_time[(p<<1)+aarx],1);
-              }
-          }
-  }
 
   return(0);
 }

openair1/PHY/NR_UE_ESTIMATION/nr_ue_measurements.c

@@ -726,7 +726,7 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
 
   ch_offset = ue->frame_parms.ofdm_symbol_size*2;
 
-printf("testing measurements\n");
+//printf("testing measurements\n");
   // signal measurements
 
   for (eNB_id=0; eNB_id<ue->n_connected_eNB; eNB_id++) {

openair1/PHY/TOOLS/cdot_prod.c

@@ -171,6 +171,7 @@ int64_t dot_product64(int16_t *x,
   __m128i minus_i = _mm_set_epi16(-1,1,-1,1,-1,1,-1,1);
   int64_t result;
 
+
   x128 = (__m128i*) x;
   y128 = (__m128i*) y;
 

openair1/PHY/TOOLS/nr_phy_scope.c

@@ -588,8 +588,8 @@ void phy_scope_nrUE(FD_phy_scope_nrue *form,
   time = calloc(samples_per_frame,sizeof(float));
   corr = calloc(samples_per_frame,sizeof(float));
 
-  chest_t = (int16_t**) phy_vars_ue->pdcch_vars[phy_vars_ue->current_thread_id[subframe]][eNB_id]->dl_ch_estimates_time;
-  chest_f = (int16_t**) phy_vars_ue->pdcch_vars[phy_vars_ue->current_thread_id[subframe]][eNB_id]->dl_ch_estimates;
+  chest_t = (int16_t**) phy_vars_ue->pbch_vars[eNB_id]->dl_ch_estimates_time;
+  chest_f = (int16_t**) phy_vars_ue->pbch_vars[eNB_id]->dl_ch_estimates;
 
   pbch_llr = (int16_t*) phy_vars_ue->pbch_vars[eNB_id]->llr;
   pbch_comp = (int16_t*) phy_vars_ue->pbch_vars[eNB_id]->rxdataF_comp[0];
@@ -696,8 +696,8 @@ void phy_scope_nrUE(FD_phy_scope_nrue *form,
         if (chest_f[(atx<<1)+arx] != NULL) {
           for (k=0; k<frame_parms->ofdm_symbol_size; k++) {
             freq[ind] = (float)ind;
-            Re = (float)(chest_f[(atx<<1)+arx][(2*k)]);
-            Im = (float)(chest_f[(atx<<1)+arx][(2*k)+1]);
+            Re = (float)(chest_f[(atx<<1)+arx][6144+(2*k)]);
+            Im = (float)(chest_f[(atx<<1)+arx][6144+(2*k)+1]);
 
             chest_f_abs[ind] = (short)10*log10(1.0+((double)Re*Re + (double)Im*Im));
             ind++;

openair1/PHY/defs_nr_UE.h

@@ -810,6 +810,10 @@ typedef struct {
   /// - first index: ? [0..7] (hard coded) FIXME! accessed via \c nb_antennas_rx
   /// - second index: ? [0..287] (hard coded)
   int32_t **dl_ch_estimates_ext;
+  /// \brief Hold the channel estimates in time domain (used for tracking).
+  /// - first index: ? [0..7] (hard coded) FIXME! accessed via \c nb_antennas_rx
+  /// - second index: samples? [0..2*ofdm_symbol_size[
+  int32_t **dl_ch_estimates_time;
   int log2_maxh;
   uint8_t pbch_a[NR_POLAR_PBCH_PAYLOAD_BITS>>3];
   uint32_t pbch_a_interleaved;

openair1/SCHED_NR_UE/defs.h

@@ -370,7 +370,7 @@ void nr_compute_srs_pos(lte_frame_type_t frameType,uint16_t isrs,uint16_t *psrsP
 void set_tx_harq_id(NR_UE_ULSCH_t *ulsch, int harq_pid, int slot_tx);
 int get_tx_harq_id(NR_UE_ULSCH_t *ulsch, int slot_tx);
 
-
+int is_pbch_in_slot(fapi_nr_pbch_config_t *pbch_config, int frame, int slot, int periodicity, uint16_t slots_per_frame);
 
 /*@}*/
 

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

@@ -4187,6 +4187,43 @@ int phy_procedures_nrUE_RX(PHY_VARS_NR_UE *ue,
   }
   uint16_t coreset_nb_rb = 6 * coreset_count;
   uint16_t coreset_start_rb = 6 * coreset_start;
+  
+  slot_pbch = is_pbch_in_slot(pbch_config, frame_rx, nr_tti_rx, ssb_periodicity, ue->frame_parms.slots_per_frame);
+
+  // looking for pbch only in slot where it is supposed to be
+  if ((ue->decode_MIB == 1) && slot_pbch)
+    {
+      LOG_I(PHY," ------  PBCH ChannelComp/LLR: frame.slot %d.%d ------  \n", frame_rx%1024, nr_tti_rx);
+
+      for (int i=1; i<4; i++) {
+
+	nr_slot_fep(ue,
+		    (ue->symbol_offset+i)%(ue->frame_parms.symbols_per_slot),
+		    nr_tti_rx,
+		    0,
+		    0);
+
+#if UE_TIMING_TRACE
+  	start_meas(&ue->dlsch_channel_estimation_stats);
+#endif
+   	nr_pbch_channel_estimation(ue,0,nr_tti_rx,(ue->symbol_offset+i)%(ue->frame_parms.symbols_per_slot),i-1,(pbch_config->ssb_index)&7,pbch_config->half_frame_bit);
+#if UE_TIMING_TRACE
+  	stop_meas(&ue->dlsch_channel_estimation_stats);
+#endif
+      
+      }
+      nr_ue_pbch_procedures(eNB_id,ue,proc,0);
+
+      if (ue->no_timing_correction==0) {
+        LOG_I(PHY,"start adjust sync slot = %d no timing %d\n", nr_tti_rx, ue->no_timing_correction);
+        nr_adjust_synch_ue(&ue->frame_parms,
+      		             ue,
+  						 eNB_id,
+  						 nr_tti_rx,
+  						 0,
+  						 16384);
+      }
+    }
 
 #ifdef NR_PDCCH_SCHED
   nr_gold_pdcch(ue, 0, 2);
@@ -4226,16 +4263,7 @@ int phy_procedures_nrUE_RX(PHY_VARS_NR_UE *ue,
   if (dci_cnt > 0) {
 
     LOG_I(PHY,"[UE  %d] Frame %d, nr_tti_rx %d: found %d DCIs\n",ue->Mod_id,frame_rx,nr_tti_rx,dci_cnt);
-    
-    if (ue->no_timing_correction==0) {
-      LOG_D(PHY,"start adjust sync slot = %d no timing %d\n", nr_tti_rx, ue->no_timing_correction);
-      nr_adjust_synch_ue(&ue->frame_parms,
-    		             ue,
-						 eNB_id,
-						 nr_tti_rx,
-						 0,
-						 16384);
-    }
+
   } else {
     LOG_D(PHY,"[UE  %d] Frame %d, nr_tti_rx %d: No DCIs found\n",ue->Mod_id,frame_rx,nr_tti_rx);
   }
@@ -4330,34 +4358,7 @@ int phy_procedures_nrUE_RX(PHY_VARS_NR_UE *ue,
 
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PDSCH_PROC_RA, VCD_FUNCTION_OUT);
   }
-
-  slot_pbch = is_pbch_in_slot(pbch_config, frame_rx, nr_tti_rx, ssb_periodicity, ue->frame_parms.slots_per_frame);
-
-  // looking for pbch only in slot where it is supposed to be
-  if ((ue->decode_MIB == 1) && slot_pbch)
-    {
-      LOG_I(PHY," ------  PBCH ChannelComp/LLR: frame.slot %d.%d ------  \n", frame_rx%1024, nr_tti_rx);
-
-      for (int i=1; i<4; i++) {
-
-	nr_slot_fep(ue,
-		    (ue->symbol_offset+i)%(ue->frame_parms.symbols_per_slot),
-		    nr_tti_rx,
-		    0,
-		    0);
-
-#if UE_TIMING_TRACE
-  	start_meas(&ue->dlsch_channel_estimation_stats);
-#endif
-   	nr_pbch_channel_estimation(ue,0,nr_tti_rx,(ue->symbol_offset+i)%(ue->frame_parms.symbols_per_slot),i-1,(pbch_config->ssb_index)&7,pbch_config->half_frame_bit);
-#if UE_TIMING_TRACE
-  	stop_meas(&ue->dlsch_channel_estimation_stats);
-#endif
-      
-      }
-      nr_ue_pbch_procedures(eNB_id,ue,proc,0);
-    }
-  
+    
   // do procedures for C-RNTI
   if (ue->dlsch[ue->current_thread_id[nr_tti_rx]][eNB_id][0]->active == 1) {
     

targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf

@@ -254,7 +254,7 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 114;
          eNB_instances  = [0];
-	 sdr_addrs = "addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.10.2,clock_source=external,time_source=external";
+	 sdr_addrs = "addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.10.2,clock_source=internal,time_source=internal";
 
     }
 );