update

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -202,17 +202,13 @@ uint16_t get_pm_index(const gNB_MAC_INST *nrmac,
     }
     nr_antenna_state_t* ant_state = nrmac->antenna_state;
     if (ant_state) {
-        int active_tx = nr_get_active_tx_antenna_count(ant_state);
-        int configured_tx = ant_state->num_tx_antennas;
         if (nr_is_in_recovery_mode(ant_state)) {
             LOG_D(NR_MAC, "[ANTENNA_MUTE] Recovery mode active, using identity matrix\n");
             return 0;
         }
-        if (active_tx < configured_tx && layers < configured_tx) {
-            LOG_D(NR_MAC, "[ANTENNA_MUTE] Using identity matrix: %d/%d TX antennas active, %d layers\n",
-            active_tx, configured_tx, layers);
-            return 0;
-        }        
+        // Don't fall back to identity matrix for muted antennas.
+        // Antenna muting is handled at RU level (nr_feptx zeros muted antenna buffers).
+        // Using proper precoding ensures data reaches all active antennas.
     }
   
     const int report_id = sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.csi_report_id;