adding 10MHz option (values to be verified)

executables/nr-ru.c

@@ -1113,6 +1113,15 @@ void fill_rf_config(RU_t *ru, char *rf_config_file) {
         cfg->tx_bw = 40e6;
         cfg->rx_bw = 40e6;
       }
+    } else if(N_RB == 24) {
+      if (fp->threequarter_fs) {
+        AssertFatal(0 == 1,"three quarter sampling not supported for N_RB 24\n");
+      } else {
+        cfg->sample_rate=15.36e6;
+        cfg->samples_per_frame = 153600;
+        cfg->tx_bw = 10e6;
+        cfg->rx_bw = 10e6;
+      }
     } else {
       AssertFatal(0==1,"N_RB %d not yet supported for numerology %d\n",N_RB,mu);
     }

openair1/PHY/INIT/nr_parms.c

@@ -108,6 +108,12 @@ void set_scs_parameters (NR_DL_FRAME_PARMS *fp, int mu, uint16_t bw)
 
       switch(bw){
         case 5:
+        case 10:
+            fp->ofdm_symbol_size = 512;
+            fp->first_carrier_offset = 368; //512 - ( (24*12) / 2 )
+            fp->nb_prefix_samples0 = 44;
+            fp->nb_prefix_samples = 36;
+            break;
         case 15:
         case 20:
         case 25:
@@ -200,7 +206,7 @@ void set_scs_parameters (NR_DL_FRAME_PARMS *fp, int mu, uint16_t bw)
           break;
         case 50:
           fp->ofdm_symbol_size = 512;
-          fp->first_carrier_offset = 320; //1024 - ( (66*12) / 2 )
+          fp->first_carrier_offset = 320; //512 - ( (32*12) / 2 )
           fp->nb_prefix_samples0 = 68;
           fp->nb_prefix_samples = 36;
           break;

openair1/SCHED_NR/phy_procedures_nr_gNB.c

@@ -379,6 +379,7 @@ void nr_fill_indication(PHY_VARS_gNB *gNB, int frame, int slot_rx, int ULSCH_id,
 
   // scale the 16 factor in N_TA calculation in 38.213 section 4.2 according to the used FFT size
   switch (gNB->frame_parms.N_RB_DL) {
+    case 24: timing_advance_update /= 4; break;
     case 106: timing_advance_update /= 16; break;
     case 217: timing_advance_update /= 32; break;
     case 245: timing_advance_update /= 32; break;