一旦

radio/rfsimulator/simulator.cpp

@@ -545,7 +545,9 @@ static void rfsimulator_readconfig(rfsimulator_state_t *rfsimulator)
       break;
     } else if (strcmp(rfsimu_params[p].strlistptr[i], "chanmod") == 0) {
       init_channelmod();
-      load_channellist(rfsimulator->tx_num_channels,
+      // Use max(tx,rx) for channel model TX dimension so the DL path works
+      // when peer has more TX antennas than our TX (e.g., UE tx=1, gNB tx=4)
+      load_channellist(std::max(rfsimulator->tx_num_channels, rfsimulator->rx_num_channels),
                        rfsimulator->rx_num_channels,
                        rfsimulator->sample_rate,
                        rfsimulator->rx_freq,
@@ -649,7 +651,7 @@ static int rfsimu_setchanmod_cmd(char *buff, int debug, telnet_printfunc_t prnt,
         if (b->channel_model->model_name == NULL)
           continue;
         if (b->conn_sock >= 0 && (strcmp(b->channel_model->model_name, modelname) == 0)) {
-          channel_desc_t *newmodel = new_channel_desc_scm(t->tx_num_channels,
+          channel_desc_t *newmodel = new_channel_desc_scm(std::max(t->tx_num_channels, t->rx_num_channels),
                                                           t->rx_num_channels,
                                                           static_cast<SCM_t>(channelmod),
                                                           t->sample_rate,