from Raymond: correct PRACH idx counter

radio/ETHERNET/oran/5g/oaioran.c

@@ -169,15 +169,15 @@ int read_prach_data(ru_info_t *ru, int frame, int slot)
 			/* convert Network order to host order */
 			  if (ru_conf->compMeth_PRACH == XRAN_COMPMETHOD_NONE) {
 			     if (sym_idx==0) {
-			        for (idx = 0; idx < 576/2; idx++)
+			        for (idx = 0; idx < 139*2; idx++)
 			        {
-			    	   dst[idx] = ((int16_t)ntohs(src[idx]))>>2;
+			    	   dst[idx] = ((int16_t)ntohs(src[idx+4]));
 			        }
 			     }
 			     else {
-			       for (idx = 0; idx < 576/2; idx++)
+			       for (idx = 0; idx < 139*2; idx++)
 			       {
-			       	   dst[idx] += ((int16_t)ntohs(src[idx]))>>2;
+			       	   dst[idx] += ((int16_t)ntohs(src[idx+4]));
 			       }
 			     }
                           } else if (ru_conf->compMeth_PRACH == XRAN_COMPMETHOD_BLKFLOAT) {
@@ -200,10 +200,11 @@ int read_prach_data(ru_info_t *ru, int frame, int slot)
                                  bfp_decom_rsp.data_out   = (int16_t*)local_dst;
                                  bfp_decom_rsp.len        = 0;
                                  xranlib_decompress_avx512(&bfp_decom_req, &bfp_decom_rsp);
-		                 if (sym_idx == 0) //memcpy((void*)dst,(void*)local_dst,576); // 576 is short PRACH 139 -> 144*4
-			         for (idx = 0; idx < (576/2); idx++) dst[idx]=local_dst[idx]>>2;
+                             // note: this is hardwired for 139 point PRACH sequence, kbar=2
+                             if (sym_idx == 0)  // 
+	                        for (idx = 0; idx < (139*2); idx++) dst[idx]=local_dst[idx+4];
 			         else
-	  	                 for (idx = 0; idx < (576/2); idx++) dst[idx]+=(local_dst[idx]>>2);
+                                for (idx = 0; idx < (139*2); idx++) dst[idx]+=(local_dst[idx+4]);
 			  } // COMPMETHOD_BLKFLOAT
 		} //aa
 	  }// symb_indx