PBCH and modulation bugs

openair1/PHY/NR_TRANSPORT/nr_pbch.c

@@ -246,6 +246,7 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
   uint16_t M;
   uint8_t nushift;
   uint32_t unscrambling_mask;
+  uint64_t a_reversed=0;
 
   LOG_I(PHY, "PBCH generation started\n");
 
@@ -300,8 +301,13 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
   printf("pbch_a_prime: 0x%08x\n", pbch->pbch_a_prime);
 #endif
 
+// Encoder reversal
+  for (int i=0; i<NR_POLAR_PBCH_PAYLOAD_BITS; i++)
+    a_reversed |= (((uint64_t)pbch->pbch_a_prime>>i)&1)<<(31-i);
+
+
   /// CRC, coding and rate matching
-  polar_encoder_fast (&pbch->pbch_a_prime, (uint32_t*)pbch->pbch_e, 0, polar_params);
+  polar_encoder_fast (&a_reversed, (uint32_t*)pbch->pbch_e, 0, polar_params);
 #ifdef DEBUG_PBCH_ENCODING
   printf("Channel coding:\n");
   for (int i=0; i<NR_POLAR_PBCH_E_DWORD; i++)

openair1/PHY/NR_TRANSPORT/nr_pss.c

@@ -48,7 +48,7 @@ int nr_generate_pss(  int16_t *d_pss,
 
   for (i=0; i < NR_PSS_LENGTH; i++) {
     m = (i + 43*Nid2)%(NR_PSS_LENGTH);
-    d_pss[i] = (1 - 2*x[m]) * 32767;
+    d_pss[i] = (1 - 2*x[m]) * 23170;
   }
 
 #ifdef NR_PSS_DEBUG

openair1/PHY/NR_TRANSPORT/nr_sss.c

@@ -57,7 +57,7 @@ int nr_generate_sss(  int16_t *d_sss,
   m1 = Nid1 % 112;
 
   for (i = 0; i < NR_SSS_LENGTH ; i++) {
-    d_sss[i] = (1 - 2*x0[(i + m0) % NR_SSS_LENGTH] ) * (1 - 2*x1[(i + m1) % NR_SSS_LENGTH] ) * 32767;
+    d_sss[i] = (1 - 2*x0[(i + m0) % NR_SSS_LENGTH] ) * (1 - 2*x1[(i + m1) % NR_SSS_LENGTH] ) * 23170;
   }
 
 #ifdef NR_SSS_DEBUG