Improve Precoding Matrix computation taking in consideration the DCI format

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -668,7 +668,8 @@ static void pf_dl(module_id_t module_id,
       else
         sched_pdsch->mcs = get_mcs_from_bler(bo, stats, &sched_ctrl->dl_bler_stats, max_mcs, frame);
       sched_pdsch->nrOfLayers = get_dl_nrOfLayers(sched_ctrl, current_BWP->dci_format);
-      sched_pdsch->pm_index = mac->identity_pm ? 0 : get_pm_index(mac, UE, sched_pdsch->nrOfLayers, mac->radio_config.pdsch_AntennaPorts.XP);
+      sched_pdsch->pm_index =
+          get_pm_index(mac, UE, current_BWP->dci_format, sched_pdsch->nrOfLayers, mac->radio_config.pdsch_AntennaPorts.XP);
       const uint8_t Qm = nr_get_Qm_dl(sched_pdsch->mcs, current_BWP->mcsTableIdx);
       const uint16_t R = nr_get_code_rate_dl(sched_pdsch->mcs, current_BWP->mcsTableIdx);
       uint32_t tbs = nr_compute_tbs(Qm,

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -131,19 +131,19 @@ uint8_t get_dl_nrOfLayers(const NR_UE_sched_ctrl_t *sched_ctrl,
 
 uint16_t get_pm_index(const gNB_MAC_INST *nrmac,
                       const NR_UE_info_t *UE,
+                      nr_dci_format_t dci_format,
                       int layers,
                       int xp_pdsch_antenna_ports)
 {
+  if (dci_format == NR_DL_DCI_FORMAT_1_0 || nrmac->identity_pm || xp_pdsch_antenna_ports == 1)
+    return 0; //identity matrix (basic 5G configuration handled by PMI report is with XP antennas)
+
   const NR_UE_sched_ctrl_t *sched_ctrl = &UE->UE_sched_ctrl;
   const int report_id = sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.csi_report_id;
   const nr_csi_report_t *csi_report = &UE->csi_report_template[report_id];
   const int N1 = csi_report->N1;
   const int N2 = csi_report->N2;
   const int antenna_ports = (N1 * N2) << 1;
-
-  if (xp_pdsch_antenna_ports == 1)
-    return 0; //identity matrix (basic 5G configuration handled by PMI report is with XP antennas)
-
   const int x1 = sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.pmi_x1;
   const int x2 = sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.pmi_x2;
   LOG_D(NR_MAC,"PMI report: x1 %d x2 %d layers: %d\n", x1, x2, layers);

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -379,6 +379,7 @@ NR_pdsch_dmrs_t get_dl_dmrs_params(const NR_ServingCellConfigCommon_t *scc,
 
 uint16_t get_pm_index(const gNB_MAC_INST *nrmac,
                       const NR_UE_info_t *UE,
+                      nr_dci_format_t dci_format,
                       int layers,
                       int xp_pdsch_antenna_ports);