dlsch ue n_dmrs_cdm_groups

openair1/PHY/NR_TRANSPORT/nr_transport_proto.h

@@ -347,4 +347,5 @@ void nr_decode_pucch0(PHY_VARS_gNB *gNB,
                       nfapi_nr_uci_pucch_pdu_format_0_1_t* uci_pdu,
                       nfapi_nr_pucch_pdu_t* pucch_pdu);
 
+
 #endif /*__NR_TRANSPORT__H__*/

openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c

@@ -267,7 +267,13 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
 
   uint8_t dmrs_Type = harq_process->dmrsConfigType;
   AssertFatal(dmrs_Type == 1 || dmrs_Type == 2,"Illegal dmrs_type %d\n",dmrs_Type);
-  uint8_t nb_re_dmrs = (dmrs_Type==1)?6:4; // should be changed based on MAC parameters
+  uint8_t nb_re_dmrs;
+  if (dmrs_Type==NFAPI_NR_DMRS_TYPE1) {
+    nb_re_dmrs = 6*harq_process->n_dmrs_cdm_groups;
+  }
+  else {
+    nb_re_dmrs = 4*harq_process->n_dmrs_cdm_groups;
+  }
   uint16_t dmrs_length = get_num_dmrs(harq_process->dlDmrsSymbPos);
   AssertFatal(dmrs_length == 1 || dmrs_length == 2,"Illegal dmrs_length %d\n",dmrs_length);
 

openair1/PHY/NR_UE_TRANSPORT/nr_transport_ue.h

@@ -292,6 +292,8 @@ typedef struct {
   uint16_t dlDmrsSymbPos;
   /// DMRS Configuration Type
   uint8_t dmrsConfigType;
+  // Number of DMRS CDM groups with no data
+  uint8_t n_dmrs_cdm_groups;
   /// Starting Symbol number
   uint16_t start_symbol;
   /// Current subband PMI allocation

openair1/SCHED_NR_UE/fapi_nr_ue_l1.c

@@ -106,6 +106,7 @@ int8_t nr_ue_scheduled_response(nr_scheduled_response_t *scheduled_response){
             dlsch0_harq->start_symbol = dlsch_config_pdu->start_symbol;
             dlsch0_harq->dlDmrsSymbPos = dlsch_config_pdu->dlDmrsSymbPos;
             dlsch0_harq->dmrsConfigType = dlsch_config_pdu->dmrsConfigType;
+            dlsch0_harq->n_dmrs_cdm_groups = dlsch_config_pdu->n_dmrs_cdm_groups;
             dlsch0_harq->mcs = dlsch_config_pdu->mcs;
             dlsch0_harq->rvidx = dlsch_config_pdu->rv;
             dlsch0->g_pucch = dlsch_config_pdu->accumulated_delta_PUCCH;

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

@@ -3291,9 +3291,8 @@ void nr_ue_dlsch_procedures(PHY_VARS_NR_UE *ue,
   NR_UE_PDSCH *pdsch_vars;
   uint8_t is_cw0_active = 0;
   uint8_t is_cw1_active = 0;
-  uint8_t dmrs_type = dlsch0->harq_processes[harq_pid]->dmrsConfigType;
-  uint8_t nb_re_dmrs = (dmrs_type==NFAPI_NR_DMRS_TYPE1)?6:4; // TODO: should changed my mac
-  uint16_t length_dmrs = 1; //cfg->pdsch_config.dmrs_max_length.value;
+  uint8_t dmrs_type, nb_re_dmrs;
+  uint16_t length_dmrs = 1; 
   uint16_t nb_symb_sch = 9;
   nr_downlink_indication_t dl_indication;
   fapi_nr_rx_indication_t rx_ind;
@@ -3318,6 +3317,13 @@ void nr_ue_dlsch_procedures(PHY_VARS_NR_UE *ue,
   is_cw0_active = dlsch0->harq_processes[harq_pid]->status;
   nb_symb_sch = dlsch0->harq_processes[harq_pid]->nb_symbols;
   start_symbol = dlsch0->harq_processes[harq_pid]->start_symbol;
+  dmrs_type = dlsch0->harq_processes[harq_pid]->dmrsConfigType;
+  if (dmrs_type==NFAPI_NR_DMRS_TYPE1) {
+    nb_re_dmrs = 6*dlsch0->harq_processes[harq_pid]->n_dmrs_cdm_groups;
+  }
+  else {
+    nb_re_dmrs = 4*dlsch0->harq_processes[harq_pid]->n_dmrs_cdm_groups;
+  }
 
   if(dlsch1)
     is_cw1_active = dlsch1->harq_processes[harq_pid]->status;

openair1/SIMULATION/NR_PHY/dlschsim.c

@@ -480,6 +480,7 @@ int main(int argc, char **argv)
 	harq_process->R = rate;
         harq_process->dmrsConfigType = 1;
 	harq_process->dlDmrsSymbPos = 4;
+        harq_process->n_dmrs_cdm_groups = 1;
 	printf("harq process ue mcs = %d Qm = %d, symb %d\n", harq_process->mcs, harq_process->Qm, nb_symb_sch);
 	unsigned char *test_input;
 	test_input = (unsigned char *) malloc16(sizeof(unsigned char) * TBS / 8);