bugfix in dmrs reception for pusch

openair1/PHY/NR_REFSIG/nr_dmrs_rx.c

@@ -63,7 +63,7 @@ int nr_pusch_dmrs_rx(PHY_VARS_gNB *gNB,
   int8_t w, nb_dmrs;
   short *mod_table;
   unsigned char idx=0;
-
+  int k;
   typedef int array_of_w[2];
   array_of_w *wf;
   array_of_w *wt;
@@ -77,18 +77,18 @@ int nr_pusch_dmrs_rx(PHY_VARS_gNB *gNB,
       if (gNB->frame_parms.Ncp == NORMAL) {
         nb_dmrs = ((dmrs_type==pusch_dmrs_type1) ? 6:4);
         for (int i=re_offset; i<re_offset+(nb_pusch_rb*nb_dmrs); i++) {
-
+          k = i-re_offset;
           w = (wf[p-1000][i&1])*(wt[p-1000][lp]);
           mod_table = (w==1) ? nr_rx_mod_table : nr_rx_nmod_table;
 
           idx = ((((nr_gold_pusch[(i<<1)>>5])>>((i<<1)&0x1f))&1)<<1) ^ (((nr_gold_pusch[((i<<1)+1)>>5])>>(((i<<1)+1)&0x1f))&1);
-          ((int16_t*)output)[i<<1] = mod_table[(NR_MOD_TABLE_QPSK_OFFSET + idx)<<1];
-          ((int16_t*)output)[(i<<1)+1] = mod_table[((NR_MOD_TABLE_QPSK_OFFSET + idx)<<1) + 1];
+          ((int16_t*)output)[k<<1] = mod_table[(NR_MOD_TABLE_QPSK_OFFSET + idx)<<1];
+          ((int16_t*)output)[(k<<1)+1] = mod_table[((NR_MOD_TABLE_QPSK_OFFSET + idx)<<1) + 1];
 #ifdef DEBUG_PUSCH
           printf("nr_pusch_dmrs_rx dmrs config type %d port %d nb_pusch_rb %d\n", dmrs_type, p, nb_pusch_rb);
           printf("wf[%d] = %d wt[%d]= %d\n", i&1, wf[p-1000][i&1], lp, wt[p-1000][lp]);
           printf("i %d idx %d pusch gold %u b0-b1 %d-%d mod_dmrs %d %d\n", i, idx, nr_gold_pusch[(i<<1)>>5], (((nr_gold_pusch[(i<<1)>>5])>>((i<<1)&0x1f))&1),
-          (((nr_gold_pusch[((i<<1)+1)>>5])>>(((i<<1)+1)&0x1f))&1), ((int16_t*)output)[i<<1], ((int16_t*)output)[(i<<1)+1]);
+          (((nr_gold_pusch[((i<<1)+1)>>5])>>(((i<<1)+1)&0x1f))&1), ((int16_t*)output)[k<<1], ((int16_t*)output)[(k<<1)+1]);
 #endif
 
         }