fix gold pdcch

openair1/PHY/NR_REFSIG/nr_gold.c

@@ -55,25 +55,23 @@ void nr_init_pbch_dmrs(PHY_VARS_gNB* gNB)
 
 void nr_init_pdcch_dmrs(PHY_VARS_gNB* gNB, uint32_t Nid)
 {
-  uint32_t x1 = 0, x2 = 0;
-  uint8_t reset;
   NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
   uint32_t ***pdcch_dmrs = gNB->nr_gold_pdcch_dmrs;
-  int pdcch_dmrs_init_length =  (((fp->N_RB_DL<<1)*3)>>5)+1;
-
-  for (uint8_t slot=0; slot<fp->slots_per_frame; slot++) {
-    for (uint8_t symb=0; symb<fp->symbols_per_slot; symb++) {
-
-      reset = 1;
-      x2 = ((1<<17) * (fp->symbols_per_slot*slot+symb+1) * ((Nid<<1)+1) + (Nid<<1));
-      LOG_D(PHY,"PDCCH DMRS slot %d, symb %d, Nid %d, x2 %x\n",slot,symb,Nid,x2);
-      for (uint32_t n=0; n<pdcch_dmrs_init_length; n++) {
+  int pdcch_dmrs_init_length = (((fp->N_RB_DL << 1) * 3) >> 5) + 1;
+
+  for (int slot = 0; slot < fp->slots_per_frame; slot++) {
+    for (int symb = 0; symb < fp->symbols_per_slot; symb++) {
+      uint8_t reset = 1;
+      uint32_t x1 = 0;
+      uint64_t temp_x2 = ((1UL << 17) * (fp->symbols_per_slot * slot + symb + 1) * ((Nid << 1) + 1) + (Nid << 1));
+      uint32_t x2 = temp_x2 % (1U << 31);
+      LOG_D(PHY,"PDCCH DMRS slot %d, symb %d, Nid %d, x2 %x\n", slot, symb, Nid, x2);
+      for (uint32_t n = 0; n < pdcch_dmrs_init_length; n++) {
         pdcch_dmrs[slot][symb][n] = lte_gold_generic(&x1, &x2, reset);
         reset = 0;
       }
     }  
   }
-
 }
 
 

openair1/PHY/NR_REFSIG/nr_gold_ue.c

@@ -54,17 +54,17 @@ void nr_gold_pbch(PHY_VARS_NR_UE* ue)
 void nr_gold_pdcch(PHY_VARS_NR_UE* ue,
                    unsigned short nid)
 {
-  unsigned int n = 0, x1 = 0, x2 = 0, x2tmp0 = 0;
-  uint8_t reset;
   int pdcch_dmrs_init_length = (((ue->frame_parms.N_RB_DL << 1) * 3) >> 5) + 1;
-
   for (int ns = 0; ns < ue->frame_parms.slots_per_frame; ns++) {
     for (int l = 0; l < ue->frame_parms.symbols_per_slot; l++) {
-      reset = 1;
-      x2tmp0 = ((ue->frame_parms.symbols_per_slot * ns + l + 1) * ((nid << 1) + 1));
+      uint8_t reset = 1;
+      uint64_t x2tmp0 = ((ue->frame_parms.symbols_per_slot * ns + l + 1) * ((nid << 1) + 1));
       x2tmp0 <<= 17;
-      x2 = (x2tmp0 + (nid << 1)) % (1U << 31);  //cinit
-      for (n=0; n<pdcch_dmrs_init_length; n++) {
+      x2tmp0 += (nid << 1);
+      uint32_t x1 = 0;
+      uint32_t x2 = x2tmp0 % (1U << 31);  //cinit
+      LOG_D(PHY,"PDCCH DMRS slot %d, symb %d, Nid %d, x2 %x\n", ns, l, nid, x2);
+      for (int n = 0; n < pdcch_dmrs_init_length; n++) {
         ue->nr_gold_pdcch[0][ns][l][n] = lte_gold_generic(&x1, &x2, reset);
         reset = 0;
       }