Payload emulation/scrambling update

openair1/PHY/NR_TRANSPORT/nr_dlsch.c

@@ -34,7 +34,7 @@
 #include "nr_dci.h"
 #include "nr_sch_dmrs.h"
 
-//#define DEBUG_DLSCH
+#define DEBUG_DLSCH
 //#define DEBUG_DLSCH_MAPPING
 
 uint8_t mod_order[5] = {1, 2, 4, 6, 8};
@@ -47,18 +47,21 @@ void nr_pdsch_codeword_scrambling(uint8_t *in,
                          uint32_t n_RNTI,
                          uint32_t* out) {
 
-  uint8_t reset;
+  uint8_t reset, b_idx;
   uint32_t x1, x2, s=0;
 
   reset = 1;
   x2 = (n_RNTI<<15) + (q<<14) + Nid;
 
   for (int i=0; i<size; i++) {
-    if ((i&0x1f)==0) {
+    b_idx = i&0x1f;
+    if (b_idx==0) {
       s = lte_gold_generic(&x1, &x2, reset);
       reset = 0;
+      if (i)
+        out++;
     }
-    *out ^= ((in[i])&1) ^ ((s>>i)&1);
+    *out ^= (((in[i])&1) ^ ((s>>b_idx)&1))<<b_idx;
   }
 
 }
@@ -209,17 +212,16 @@ uint8_t nr_generate_pdsch(NR_gNB_DLSCH_t dlsch,
   uint16_t encoded_length = nb_symbols*Qm;
 
   /// CRC, coding, interleaving and rate matching
-  memset((void*)harq->pdu, 1, (TBS>>3)*sizeof(uint8_t));
   nr_dlsch_encoding(harq->pdu, subframe, &dlsch, &frame_parms);
 #ifdef DEBUG_DLSCH
 printf("PDSCH encoding:\nPayload:\n");
-for (int i=0; i<MAX_NR_DLSCH_PAYLOAD_BYTES>>4; i++) {
+for (int i=0; i<TBS>>7; i++) {
   for (int j=0; j<16; j++)
     printf("0x%02x\t", harq->pdu[(i<<4)+j]);
   printf("\n");
 }
 printf("\nEncoded payload:\n");
-for (int i=0; i<encoded_length>>4; i++) {
+for (int i=0; i<encoded_length>>7; i++) {
   for (int j=0; j<16; j++)
     printf("0x%02x\t", harq->f[(i<<4)+j]);
   printf("\n");
@@ -290,8 +292,8 @@ for (int l=0; l<rel15->nb_layers; l++)
   l0 = get_l0(dmrs_type, 2);//config.pdsch_config.dmrs_typeA_position.value);
   nr_modulation(pdsch_dmrs[l0][0], n_dmrs, MOD_QPSK, mod_dmrs); // currently only codeword 0 is modulated
 #ifdef DEBUG_DLSCH
-printf("DMRS modulation (single symbol %d, %d symbols, type %d):\n", l0, n_dmrs, dmrs_type);
-for (int i=0; i<n_dmrs>>3; i++) {
+printf("DMRS modulation (single symbol %d, %d symbols, type %d):\n", l0, n_dmrs>>1, dmrs_type);
+for (int i=0; i<n_dmrs>>4; i++) {
   for (int j=0; j<8; j++) {
     printf("%d %d\t", mod_dmrs[((i<<3)+j)<<1], mod_dmrs[(((i<<3)+j)<<1)+1]);
   }
@@ -366,6 +368,5 @@ m, l, k, ((int16_t*)txdataF[ap])[(l*frame_parms.ofdm_symbol_size + k)<<1],
       }
     }
   }
-
   return 0;
 }

openair1/PHY/NR_TRANSPORT/nr_dlsch.h

@@ -95,3 +95,5 @@ int nr_dlsch_encoding(unsigned char *a,
                      NR_gNB_DLSCH_t *dlsch,
                      NR_DL_FRAME_PARMS* frame_parms);
 
+void nr_emulate_dlsch_payload(uint8_t* payload, uint16_t size);
+

openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c

@@ -178,6 +178,7 @@ NR_gNB_DLSCH_t *new_gNB_dlsch(unsigned char Kmimo,
         dlsch->harq_processes[i]->pdu = (uint8_t*)malloc16(MAX_NR_DLSCH_PAYLOAD_BYTES/bw_scaling);
         if (dlsch->harq_processes[i]->pdu) {
           bzero(dlsch->harq_processes[i]->pdu,MAX_NR_DLSCH_PAYLOAD_BYTES/bw_scaling);
+          nr_emulate_dlsch_payload(dlsch->harq_processes[i]->pdu, (MAX_NR_DLSCH_PAYLOAD_BYTES/bw_scaling)>>3);
         } else {
           printf("Can't allocate PDU\n");
           exit_flag=1;

openair1/PHY/NR_TRANSPORT/nr_dlsch_tools.c

@@ -237,3 +237,10 @@ void nr_get_PRG_parms(NR_BWP_PARMS* bwp, NR_gNB_DCI_ALLOC_t dci_alloc, uint8_t p
   LOG_I(PHY, "PRG parameters for BWP %d location %d N_RB %d:\n", bwp->bwp_id, bwp->location, bwp->N_RB);
   LOG_I(PHY, "P_prime %d\t start size %d\t endsize %d\t N_PRG %d\n", prg_parms->P_prime, prg_parms->start_size, prg_parms->end_size, prg_parms->N_PRG);
 }
+
+  /// Payload emulation
+void nr_emulate_dlsch_payload(uint8_t* pdu, uint16_t size) {
+  set_taus_seed(0);
+  for (int i=0; i<size; i++)
+    *(pdu+i) = (uint8_t)rand();
+}

openair1/PHY/NR_TRANSPORT/nr_tbs_tools.c

@@ -160,8 +160,6 @@ void nr_get_tbs(nfapi_nr_dl_config_dlsch_pdu *dlsch_pdu,
         TBS = (CEILIDIV((Ninfo_prime+24),8) - 24)<<3;
     }    
   }
-  LOG_I(MAC, "TBS %d : N_RE %d  N_PRB_DMRS %d N_sh_symb %d N_PRB_oh %d Ninfo %d Ninfo_prime %d R %d Qm %d table %d scale %d\n",
-  TBS, N_RE, N_PRB_DMRS, N_sh_symb, N_PRB_oh, Ninfo, Ninfo_prime, R, Qm, table_idx, scale);
 
   dlsch_rel15->coding_rate = R;
   dlsch_rel15->modulation_order = Qm;
@@ -169,6 +167,8 @@ void nr_get_tbs(nfapi_nr_dl_config_dlsch_pdu *dlsch_pdu,
   dlsch_rel15->nb_re_dmrs = N_PRB_DMRS;
   dlsch_rel15->nb_mod_symbols = N_RE_prime*dlsch_rel15->n_prb*dlsch_rel15->nb_codewords;
 
+  LOG_I(MAC, "TBS %d : N_RE %d  N_PRB_DMRS %d N_sh_symb %d N_PRB_oh %d Ninfo %d Ninfo_prime %d R %d Qm %d table %d scale %d nb_symbols %d\n",
+  TBS, N_RE, N_PRB_DMRS, N_sh_symb, N_PRB_oh, Ninfo, Ninfo_prime, R, Qm, table_idx, scale, dlsch_rel15->nb_mod_symbols);
 }
 
 uint32_t nr_get_G(uint16_t nb_rb, uint16_t nb_symb_sch,uint8_t nb_re_dmrs,uint16_t length_dmrs, uint8_t Qm, uint8_t Nl) {

openair1/PHY/defs_nr_common.h

@@ -90,6 +90,7 @@
 #define NR_MAX_NB_CODEWORDS 2
 #define NR_MAX_NB_HARQ_PROCESSES 16
 #define NR_MAX_PDSCH_ENCODED_LENGTH 950984
+#define NR_MAX_PDSCH_TBS 3824
 
 typedef enum {
   NR_MU_0=0,