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PBCH RE mapping fix

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This commit is contained in:
Guy De Souza
2018-05-24 15:05:03 +02:00
parent 21fdaecfa0
commit 5e980ccd37
3 changed files with 56 additions and 27 deletions
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openair1/PHY/NR_TRANSPORT/nr_pbch.c
+54 -26
View File
@@ -32,7 +32,7 @@
#include "PHY/defs_gNB.h"
#include "PHY/NR_TRANSPORT/nr_transport.h"
#include "PHY/phy_extern.h"
#include "PHY/LTE_REFSIG/lte_refsig.h"
#include "PHY/sse_intrin.h"
//#define DEBUG_PBCH
@@ -130,6 +130,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
void nr_pbch_scrambling(uint32_t Nid,
uint8_t *pbch_a,
uint8_t nushift,
uint32_t length)
{
uint8_t reset;
@@ -162,7 +163,7 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
NR_DL_FRAME_PARMS *frame_parms)
{
int k,l,ssb_sc_idx;
int k,l,m;
int16_t a;
int16_t mod_pbch_e[NR_POLAR_PBCH_E<<1];
uint8_t sfn_4lsb, idx=0;
@@ -188,7 +189,7 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
#endif
// Scrambling
nr_pbch_scrambling((uint32_t)config->sch_config.physical_cell_id.value, pbch->pbch_a, NR_POLAR_PBCH_PAYLOAD_BITS);
nr_pbch_scrambling((uint32_t)config->sch_config.physical_cell_id.value, nushift, pbch->pbch_a, NR_POLAR_PBCH_PAYLOAD_BITS);
#ifdef DEBUG_PBCH_ENCODING
#endif
@@ -220,21 +221,22 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
///symbol 1 [0:239] -- 180 mod symbols
k = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier;
l = ssb_start_symbol + 1;
ssb_sc_idx = 0;
m = 0;
for (int ssb_sc_idx = 0; ssb_sc_idx < 240; ssb_sc_idx++) {
for (int m = 0; m < 180; m++) {
#ifdef DEBUG_PBCH
printf("m %d at k %d of l %d\n", m, k, l);
#endif
if ((ssb_sc_idx&3) == nushift) { //skip DMRS
k++;
ssb_sc_idx++;
continue;
}
else {
#ifdef DEBUG_PBCH
printf("m %d ssb_sc_idx %d at k %d of l %d\n", m, ssb_sc_idx, k, l);
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_pbch_e[m<<1]) >> 15;
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_pbch_e[(m<<1) + 1]) >> 15;
k++;
ssb_sc_idx++;
m++;
}
if (k >= frame_parms->ofdm_symbol_size)
@@ -244,21 +246,46 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
///symbol 2 [0:47 ; 192:239] -- 72 mod symbols
k = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier;
l++;
ssb_sc_idx = 0;
m=180;
for (int ssb_sc_idx = 0; ssb_sc_idx < 48; ssb_sc_idx++) {
for (int m = 180; m < 252; m++) {
#ifdef DEBUG_PBCH
printf("m %d at k %d of l %d\n", m, k, l);
#endif
if ((ssb_sc_idx&3) == nushift) {
k+=(m==47)?145:1;
ssb_sc_idx+=(m==47)?145:1;
k++;
continue;
}
else {
#ifdef DEBUG_PBCH
printf("m %d ssb_sc_idx %d at k %d of l %d\n", m, ssb_sc_idx, k, l);
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_pbch_e[m<<1]) >> 15;
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_pbch_e[(m<<1) + 1]) >> 15;
k+=(m==47)?145:1;
ssb_sc_idx+=(m==47)?145:1;
k++;
m++;
}
if (k >= frame_parms->ofdm_symbol_size)
k-=frame_parms->ofdm_symbol_size;
}
k+=145;
l++;
m=216;
for (int ssb_sc_idx = 192; ssb_sc_idx < 240; ssb_sc_idx++) {
if ((ssb_sc_idx&3) == nushift) {
k++;
continue;
}
else {
#ifdef DEBUG_PBCH
printf("m %d ssb_sc_idx %d at k %d of l %d\n", m, ssb_sc_idx, k, l);
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_pbch_e[m<<1]) >> 15;
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_pbch_e[(m<<1) + 1]) >> 15;
k++;
m++;
}
if (k >= frame_parms->ofdm_symbol_size)
@@ -268,21 +295,22 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
///symbol 3 [0:239] -- 180 mod symbols
k = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier;
l++;
ssb_sc_idx = 0;
m=252;
for (int ssb_sc_idx = 0; ssb_sc_idx < 240; ssb_sc_idx++) {
for (int m = 252; m < NR_POLAR_PBCH_E>>1; m++) {
#ifdef DEBUG_PBCH
printf("m %d at k %d of l %d\n", m, k, l);
#endif
if ((ssb_sc_idx&3) == nushift) {
k++;
ssb_sc_idx++;
continue;
}
else {
#ifdef DEBUG_PBCH
printf("m %d ssb_sc_idx %d at k %d of l %d\n", m, ssb_sc_idx, k, l);
#endif
((int16_t*)txdataF[aa])[(l*frame_parms->ofdm_symbol_size + k)<<1] = (a * mod_pbch_e[m<<1]) >> 15;
((int16_t*)txdataF[aa])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1] = (a * mod_pbch_e[(m<<1) + 1]) >> 15;
k++;
ssb_sc_idx++;
m++;
}
if (k >= frame_parms->ofdm_symbol_size)
openair1/PHY/NR_TRANSPORT/nr_transport.h
+1
View File
@@ -73,6 +73,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
*/
void nr_pbch_scrambling(uint32_t Nid,
uint8_t *pbch_a,
uint8_t nushift,
uint32_t length);
/*!
targets/RT/USER/nr-gnb.c
+1 -1
View File
@@ -20,7 +20,7 @@
*/
/*! \file lte-enb.c
* \brief Top-level threads for eNodeB
* \brief Top-level threads for gNodeB
* \author R. Knopp, F. Kaltenberger, Navid Nikaein
* \date 2012
* \version 0.1