DMRS shift disabling on gNB

openair1/PHY/MODULATION/slot_fep_nr.c

@@ -55,8 +55,8 @@ int nr_slot_fep(PHY_VARS_NR_UE *ue,
   unsigned int frame_length_samples = frame_parms->samples_per_subframe * 10;
   unsigned int rx_offset;
   NR_UE_PDCCH *pdcch_vars  = ue->pdcch_vars[ue->current_thread_id[Ns>>1]][0];
-  uint16_t coreset_start_subcarrier = frame_parms->first_carrier_offset;//+((int)floor(frame_parms->ssb_start_subcarrier/NR_NB_SC_PER_RB)+pdcch_vars->coreset[0].rb_offset)*NR_NB_SC_PER_RB;
-  uint16_t nb_rb_coreset = 24;
+  uint16_t coreset_start_subcarrier = frame_parms->first_carrier_offset + pdcch_vars->coreset[0].rb_offset*NR_NB_SC_PER_RB;//+((int)floor(frame_parms->ssb_start_subcarrier/NR_NB_SC_PER_RB)+pdcch_vars->coreset[0].rb_offset)*NR_NB_SC_PER_RB;
+  uint16_t nb_rb_coreset = pdcch_vars->coreset[0].rb_offset;
   uint16_t bwp_start_subcarrier = frame_parms->first_carrier_offset;//+516;
   uint16_t nb_rb_pdsch = 50;
   uint8_t p=0;

openair1/PHY/NR_TRANSPORT/nr_dci.c

@@ -32,7 +32,7 @@
 
 #include "nr_dci.h"
 
-//#define DEBUG_PDCCH_DMRS
+#define DEBUG_PDCCH_DMRS
 #define DEBUG_DCI
 #define DEBUG_CHANNEL_CODING
 
@@ -207,12 +207,12 @@ uint8_t nr_generate_dci_top(NR_gNB_PDCCH pdcch_vars,
   /// DMRS QPSK modulation
     /*There is a need to shift from which index the pregenerated DMRS sequence is used
      * see 38211 r15.2.0 section 7.4.1.3.2: assumption is the reference point for k refers to the DMRS sequence*/
-  if (pdcch_params.config_type == NFAPI_NR_CSET_CONFIG_PDCCH_CONFIG) {
+  /*if (pdcch_params.config_type == NFAPI_NR_CSET_CONFIG_PDCCH_CONFIG) {
     for (int symb=cset_start_symb; symb<cset_start_symb + pdcch_params.n_symb; symb++)
       gold_pdcch_dmrs[symb] += (pdcch_params.rb_offset*3)>>5;
     dmrs_offset = (pdcch_params.rb_offset*3)&0x1f;
   LOG_I(PHY, "PDCCH DMRS offset %d\n", dmrs_offset);
-  }
+  }*/ // DMRS shift currently disable for compatibility with the OAI UE
 
   for (int symb=cset_start_symb; symb<cset_start_symb + pdcch_params.n_symb; symb++) {
     if (dmrs_offset) {

openair1/PHY/NR_TRANSPORT/nr_tbs_tools.c

@@ -21,7 +21,7 @@
 
 /*! \file PHY/LTE_TRANSPORT/dlsch_coding.c
 * \brief Top-level routines for implementing LDPC-coded (DLSCH) transport channels from 38-212, 15.2
-* \author H.Wang
+* \author H.Wang, Guy De Souza
 * \date 2018
 * \version 0.1
 * \company Eurecom

openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c

@@ -29,7 +29,7 @@
 #include "filt16a_32.h"
 #include "T.h"
 //#define DEBUG_PDSCH
-//#define DEBUG_PDCCH
+#define DEBUG_PDCCH
 
 
 int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
@@ -262,7 +262,7 @@ int nr_pdcch_channel_estimation(PHY_VARS_NR_UE *ue,
 				unsigned short coreset_start_subcarrier,
 				unsigned short nb_rb_coreset)
 {
-  int pilot[200] __attribute__((aligned(16)));
+  int pilot[300] __attribute__((aligned(16)));
   unsigned char aarx,p;
   unsigned short k;
   unsigned int pilot_cnt;

openair1/SIMULATION/NR_PHY/dlsim.c

@@ -604,7 +604,7 @@ int main(int argc, char **argv)
   
   uint64_t mask = 0x0;
   uint16_t num_rbs=24;
-  uint16_t rb_offset=0;
+  uint16_t rb_offset=24;
   uint16_t cell_id=0;
   uint16_t num_symbols=2;
   for(i=0; i<(num_rbs/6); ++i){   //  38.331 Each bit corresponds a group of 6 RBs

openair2/LAYER2/NR_MAC_gNB/main.c

@@ -47,7 +47,7 @@ extern RAN_CONTEXT_t RC;
 void nr_init_coreset(nfapi_nr_coreset_t *coreset) {
 
   coreset->coreset_id = 1;
-  coreset->frequency_domain_resources = 0x1E0000000000;//0x1FFFE0000000; // 96 RB starting from CRB0
+  coreset->frequency_domain_resources = 0x1E000000000;//0x1FFFE0000000; // 96 RB starting from CRB0
   coreset->duration = 2;
   coreset->cce_reg_mapping_type = NFAPI_NR_CCE_REG_MAPPING_NON_INTERLEAVED;
   coreset->reg_bundle_size = 6;