phy: pass number PRBs from the correct cell config into the channel emulator when running NR standalone mode

srsenb/src/phy/phy_common.cc

@@ -46,10 +46,11 @@ bool phy_common::init(const phy_cell_cfg_list_t&    cell_list_,
 
   // Instantiate DL channel emulator
   if (params.dl_channel_args.enable) {
+    int channel_prbs = (cell_list_lte.empty()) ? cell_list_nr[0].carrier.nof_prb : cell_list_lte[0].cell.nof_prb;
     dl_channel = srsran::channel_ptr(
         new srsran::channel(params.dl_channel_args, get_nof_rf_channels(), srslog::fetch_basic_logger("PHY")));
-    dl_channel->set_srate((uint32_t)srsran_sampling_freq_hz(cell_list_lte[0].cell.nof_prb));
-    dl_channel->set_signal_power_dBfs(srsran_enb_dl_get_maximum_signal_power_dBfs(cell_list_lte[0].cell.nof_prb));
+    dl_channel->set_srate((uint32_t)srsran_sampling_freq_hz(channel_prbs));
+    dl_channel->set_signal_power_dBfs(srsran_enb_dl_get_maximum_signal_power_dBfs(channel_prbs));
   }
 
   // Create grants
@@ -58,7 +59,9 @@ bool phy_common::init(const phy_cell_cfg_list_t&    cell_list_,
   }
 
   // Set UE PHY data-base stack and configuration
-  ue_db.init(stack, params, cell_list_lte);
+  if (!cell_list_lte.empty()) {
+    ue_db.init(stack, params, cell_list_lte);
+  }
   if (mcch_configured) {
     build_mch_table();
     build_mcch_table();