5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

PBCH decoding assumes number of ports when they are known

Browse Source
master
ismagom 10 years ago
parent cb05db2bd1
commit 94f2e84f09
14 changed files with 117 additions and 99 deletions
Show Stats Download Patch File Download Diff File

2
srslte/examples/cell_measurement.c
Unescape Escape View File

@ -145,7 +145,7 @@ int main(int argc, char **argv) {
uint32_t nof_trials = 0; uint32_t nof_trials = 0;
uint32_t sfn = 0; // system frame number uint32_t sfn = 0; // system frame number
int n; int n;
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
uint32_t sfn_offset; uint32_t sfn_offset;
float rssi_utra=0,rssi=0, rsrp=0, rsrq=0, snr=0; float rssi_utra=0,rssi=0, rsrp=0, rsrq=0, snr=0;
cf_t *ce[SRSLTE_MAX_PORTS]; cf_t *ce[SRSLTE_MAX_PORTS];

2
srslte/examples/cuhd_utils.c
Unescape Escape View File

@ -53,7 +53,7 @@ int cuhd_recv_wrapper_cs(void *h, void *data, uint32_t nsamples, srslte_timestam
int cuhd_mib_decoder(void *uhd, uint32_t max_nof_frames, srslte_cell_t *cell) { int cuhd_mib_decoder(void *uhd, uint32_t max_nof_frames, srslte_cell_t *cell) {
int ret = SRSLTE_ERROR; int ret = SRSLTE_ERROR;
srslte_ue_mib_sync_t ue_mib; srslte_ue_mib_sync_t ue_mib;
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
if (srslte_ue_mib_sync_init(&ue_mib, cell->id, cell->cp, cuhd_recv_wrapper_cs, uhd)) { if (srslte_ue_mib_sync_init(&ue_mib, cell->id, cell->cp, cuhd_recv_wrapper_cs, uhd)) {
fprintf(stderr, "Error initiating srslte_ue_mib_sync\n"); fprintf(stderr, "Error initiating srslte_ue_mib_sync\n");

2
srslte/examples/pdsch_enodeb.c
Unescape Escape View File

@ -442,7 +442,7 @@ int main(int argc, char **argv) {
cf_t pss_signal[SRSLTE_PSS_LEN]; cf_t pss_signal[SRSLTE_PSS_LEN];
float sss_signal0[SRSLTE_SSS_LEN]; // for subframe 0 float sss_signal0[SRSLTE_SSS_LEN]; // for subframe 0
float sss_signal5[SRSLTE_SSS_LEN]; // for subframe 5 float sss_signal5[SRSLTE_SSS_LEN]; // for subframe 5
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
int i; int i;
cf_t *sf_symbols[SRSLTE_MAX_PORTS]; cf_t *sf_symbols[SRSLTE_MAX_PORTS];
cf_t *slot1_symbols[SRSLTE_MAX_PORTS]; cf_t *slot1_symbols[SRSLTE_MAX_PORTS];

5
srslte/examples/pdsch_ue.c
Unescape Escape View File

@ -247,7 +247,7 @@ int main(int argc, char **argv) {
#endif #endif
uint32_t nof_trials = 0; uint32_t nof_trials = 0;
int n; int n;
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
uint32_t sfn_offset; uint32_t sfn_offset;
parse_args(&prog_args, argc, argv); parse_args(&prog_args, argc, argv);
@ -369,6 +369,7 @@ int main(int argc, char **argv) {
bool decode_pdsch; bool decode_pdsch;
int pdcch_tx=0; int pdcch_tx=0;
INFO("\nEntering main loop...\n\n", 0);
/* Main loop */ /* Main loop */
while (!go_exit && (sf_cnt < prog_args.nof_subframes || prog_args.nof_subframes == -1)) { while (!go_exit && (sf_cnt < prog_args.nof_subframes || prog_args.nof_subframes == -1)) {
@ -389,7 +390,7 @@ int main(int argc, char **argv) {
exit(-1); exit(-1);
} else if (n == SRSLTE_UE_MIB_FOUND) { } else if (n == SRSLTE_UE_MIB_FOUND) {
srslte_pbch_mib_unpack(bch_payload, &cell, &sfn); srslte_pbch_mib_unpack(bch_payload, &cell, &sfn);
srslte_pbch_mib_fprint(stdout, &cell, sfn, cell.id); srslte_cell_fprint(stdout, &cell, sfn);
printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset); printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset);
sfn = (sfn + sfn_offset)%1024; sfn = (sfn + sfn_offset)%1024;
state = DECODE_PDSCH; state = DECODE_PDSCH;

4
srslte/examples/prach_ue.c
Unescape Escape View File

@ -295,7 +295,7 @@ int main(int argc, char **argv) {
srslte_ue_mib_t ue_mib; srslte_ue_mib_t ue_mib;
void *uhd; void *uhd;
int n; int n;
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
uint32_t sfn_offset; uint32_t sfn_offset;
rar_msg_t rar_msg; rar_msg_t rar_msg;
srslte_ra_pusch_t ra_pusch; srslte_ra_pusch_t ra_pusch;
@ -476,7 +476,7 @@ int main(int argc, char **argv) {
exit(-1); exit(-1);
} else if (n == SRSLTE_UE_MIB_FOUND) { } else if (n == SRSLTE_UE_MIB_FOUND) {
srslte_pbch_mib_unpack(bch_payload, &cell, &sfn); srslte_pbch_mib_unpack(bch_payload, &cell, &sfn);
srslte_pbch_mib_fprint(stdout, &cell, sfn, cell.id); srslte_cell_fprint(stdout, &cell, sfn);
printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset); printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset);
sfn = (sfn + sfn_offset)%1024; sfn = (sfn + sfn_offset)%1024;
state = SEND_PRACH; state = SEND_PRACH;

3
srslte/include/srslte/common/phy_common.h
Unescape Escape View File

@ -182,7 +182,8 @@ enum band_geographical_area {
SRSLTE_API bool srslte_cell_isvalid(srslte_cell_t *cell); SRSLTE_API bool srslte_cell_isvalid(srslte_cell_t *cell);
SRSLTE_API void srslte_cell_fprint(FILE *stream, SRSLTE_API void srslte_cell_fprint(FILE *stream,
srslte_cell_t *cell); srslte_cell_t *cell,
uint32_t sfn);
SRSLTE_API bool srslte_cellid_isvalid(uint32_t cell_id); SRSLTE_API bool srslte_cellid_isvalid(uint32_t cell_id);

29
srslte/include/srslte/phch/pbch.h
Unescape Escape View File

@ -28,7 +28,9 @@
/****************************************************************************** /******************************************************************************
* File: pbch.h * File: pbch.h
* *
* Description: Physical broadcast channel. * Description: Physical broadcast channel. If cell.nof_ports = 0, the number
* of ports is blindly determined using the CRC of the received
* codeword for 1, 2 and 4 ports
* *
* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.6 * Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.6
*****************************************************************************/ *****************************************************************************/
@ -48,12 +50,9 @@
#include "srslte/fec/viterbi.h" #include "srslte/fec/viterbi.h"
#include "srslte/fec/crc.h" #include "srslte/fec/crc.h"
#define BCH_PAYLOAD_LEN 24 #define SRSLTE_BCH_PAYLOAD_LEN 24
#define BCH_PAYLOADCRC_LEN (BCH_PAYLOAD_LEN+16) #define SRSLTE_BCH_PAYLOADCRC_LEN (SRSLTE_BCH_PAYLOAD_LEN+16)
#define BCH_ENCODED_LEN 3*(BCH_PAYLOADCRC_LEN) #define SRSLTE_BCH_ENCODED_LEN 3*(SRSLTE_BCH_PAYLOADCRC_LEN)
#define PBCH_RE_SRSLTE_CP_NORM 240
#define PBCH_RE_SRSLTE_CP_EXT 216
/* PBCH object */ /* PBCH object */
typedef struct SRSLTE_API { typedef struct SRSLTE_API {
@ -68,10 +67,10 @@ typedef struct SRSLTE_API {
cf_t *d; cf_t *d;
float *llr; float *llr;
float *temp; float *temp;
float rm_f[BCH_ENCODED_LEN]; float rm_f[SRSLTE_BCH_ENCODED_LEN];
uint8_t *rm_b; uint8_t *rm_b;
uint8_t data[BCH_PAYLOADCRC_LEN]; uint8_t data[SRSLTE_BCH_PAYLOADCRC_LEN];
uint8_t data_enc[BCH_ENCODED_LEN]; uint8_t data_enc[SRSLTE_BCH_ENCODED_LEN];
uint32_t frame_idx; uint32_t frame_idx;
@ -83,6 +82,7 @@ typedef struct SRSLTE_API {
srslte_crc_t crc; srslte_crc_t crc;
srslte_convcoder_t encoder; srslte_convcoder_t encoder;
srslte_precoding_t precoding; srslte_precoding_t precoding;
bool search_all_ports;
} srslte_pbch_t; } srslte_pbch_t;
@ -94,12 +94,12 @@ SRSLTE_API int srslte_pbch_decode(srslte_pbch_t *q,
cf_t *slot1_symbols, cf_t *slot1_symbols,
cf_t *ce_slot1[SRSLTE_MAX_PORTS], cf_t *ce_slot1[SRSLTE_MAX_PORTS],
float noise_estimate, float noise_estimate,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
uint32_t *nof_tx_ports, uint32_t *nof_tx_ports,
uint32_t *sfn_offset); uint32_t *sfn_offset);
SRSLTE_API int srslte_pbch_encode(srslte_pbch_t *q, SRSLTE_API int srslte_pbch_encode(srslte_pbch_t *q,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
cf_t *slot1_symbols[SRSLTE_MAX_PORTS]); cf_t *slot1_symbols[SRSLTE_MAX_PORTS]);
SRSLTE_API void srslte_pbch_decode_reset(srslte_pbch_t *q); SRSLTE_API void srslte_pbch_decode_reset(srslte_pbch_t *q);
@ -112,9 +112,4 @@ SRSLTE_API void srslte_pbch_mib_pack(srslte_cell_t *cell,
uint32_t sfn, uint32_t sfn,
uint8_t *msg); uint8_t *msg);
SRSLTE_API void srslte_pbch_mib_fprint(FILE *stream,
srslte_cell_t *cell,
uint32_t sfn,
uint32_t cell_id);
#endif // PBCH_ #endif // PBCH_

13
srslte/include/srslte/ue/ue_mib.h
Unescape Escape View File

@ -36,7 +36,7 @@
* *
* The function uses the sync_t object to find the PSS sequence and * The function uses the sync_t object to find the PSS sequence and
* decode the PBCH to obtain the MIB. * decode the PBCH to obtain the MIB.
* *
* The function returns 0 until the MIB is decoded. * The function returns 0 until the MIB is decoded.
* *
* See ue_cell_detect.c for an example. * See ue_cell_detect.c for an example.
@ -57,7 +57,6 @@
#include "srslte/dft/ofdm.h" #include "srslte/dft/ofdm.h"
#define SRSLTE_UE_MIB_MAX_PORTS 4
#define SRSLTE_UE_MIB_NOF_PRB 6 #define SRSLTE_UE_MIB_NOF_PRB 6
#define SRSLTE_UE_MIB_FOUND 1 #define SRSLTE_UE_MIB_FOUND 1
@ -67,13 +66,13 @@ typedef struct SRSLTE_API {
srslte_sync_t sfind; srslte_sync_t sfind;
cf_t *sf_symbols; cf_t *sf_symbols;
cf_t *ce[SRSLTE_UE_MIB_MAX_PORTS]; cf_t *ce[SRSLTE_MAX_PORTS];
srslte_ofdm_t fft; srslte_ofdm_t fft;
srslte_chest_dl_t chest; srslte_chest_dl_t chest;
srslte_pbch_t pbch; srslte_pbch_t pbch;
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
uint32_t nof_tx_ports; uint32_t nof_tx_ports;
uint32_t sfn_offset; uint32_t sfn_offset;
@ -89,13 +88,15 @@ SRSLTE_API void srslte_ue_mib_reset(srslte_ue_mib_t * q);
SRSLTE_API int srslte_ue_mib_decode(srslte_ue_mib_t * q, SRSLTE_API int srslte_ue_mib_decode(srslte_ue_mib_t * q,
cf_t *input, cf_t *input,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
uint32_t *nof_tx_ports, uint32_t *nof_tx_ports,
uint32_t *sfn_offset); uint32_t *sfn_offset);
/* This interface uses ue_mib and ue_sync to first get synchronized subframes /* This interface uses ue_mib and ue_sync to first get synchronized subframes
* and then decode MIB * and then decode MIB
*
* This object calls the pbch object with nof_ports=0 for blind nof_ports determination
*/ */
typedef struct { typedef struct {
srslte_ue_mib_t ue_mib; srslte_ue_mib_t ue_mib;
@ -114,7 +115,7 @@ SRSLTE_API void srslte_ue_mib_sync_reset(srslte_ue_mib_sync_t * q);
SRSLTE_API int srslte_ue_mib_sync_decode(srslte_ue_mib_sync_t * q, SRSLTE_API int srslte_ue_mib_sync_decode(srslte_ue_mib_sync_t * q,
uint32_t max_frames_timeout, uint32_t max_frames_timeout,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
uint32_t *nof_tx_ports, uint32_t *nof_tx_ports,
uint32_t *sfn_offset); uint32_t *sfn_offset);

27
srslte/lib/common/src/phy_common.c
Unescape Escape View File

@ -75,8 +75,31 @@ bool srslte_cell_isvalid(srslte_cell_t *cell) {
srslte_nofprb_isvalid(cell->nof_prb); srslte_nofprb_isvalid(cell->nof_prb);
} }
void srslte_cell_fprint(FILE *stream, srslte_cell_t *cell) { void srslte_cell_fprint(FILE *stream, srslte_cell_t *cell, uint32_t sfn) {
fprintf(stream, "PCI: %d, CP: %s, PRB: %d, Ports: %d\n", cell->id, srslte_cp_string(cell->cp), cell->nof_prb, cell->nof_ports); fprintf(stream, " - Cell ID: %d\n", cell->id);
fprintf(stream, " - Nof ports: %d\n", cell->nof_ports);
fprintf(stream, " - CP: %s\n", srslte_cp_string(cell->cp));
fprintf(stream, " - PRB: %d\n", cell->nof_prb);
fprintf(stream, " - PHICH Length: %s\n",
cell->phich_length == SRSLTE_PHICH_EXT ? "Extended" : "Normal");
fprintf(stream, " - PHICH Resources: ");
switch (cell->phich_resources) {
case SRSLTE_PHICH_SRSLTE_PHICH_R_1_6:
fprintf(stream, "1/6");
break;
case SRSLTE_PHICH_SRSLTE_PHICH_R_1_2:
fprintf(stream, "1/2");
break;
case SRSLTE_PHICH_R_1:
fprintf(stream, "1");
break;
case SRSLTE_PHICH_R_2:
fprintf(stream, "2");
break;
}
fprintf(stream, "\n");
fprintf(stream, " - SFN: %d\n", sfn);
} }
bool srslte_sfidx_isvalid(uint32_t sf_idx) { bool srslte_sfidx_isvalid(uint32_t sf_idx) {

81
srslte/lib/phch/src/pbch.c
Unescape Escape View File

@ -41,6 +41,10 @@
#include "srslte/utils/vector.h" #include "srslte/utils/vector.h"
#include "srslte/utils/debug.h" #include "srslte/utils/debug.h"
#define PBCH_RE_CP_NORM 240
#define PBCH_RE_CP_EXT 216
const uint8_t srslte_crc_mask[4][16] = { const uint8_t srslte_crc_mask[4][16] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
@ -137,8 +141,16 @@ int srslte_pbch_init(srslte_pbch_t *q, srslte_cell_t cell) {
ret = SRSLTE_ERROR; ret = SRSLTE_ERROR;
bzero(q, sizeof(srslte_pbch_t)); bzero(q, sizeof(srslte_pbch_t));
if (cell.nof_ports == 0) {
q->search_all_ports = true;
cell.nof_ports = SRSLTE_MAX_PORTS;
} else {
q->search_all_ports = false;
}
q->cell = cell; q->cell = cell;
q->nof_symbols = (SRSLTE_CP_ISNORM(q->cell.cp)) ? PBCH_RE_SRSLTE_CP_NORM : PBCH_RE_SRSLTE_CP_EXT; q->nof_symbols = (SRSLTE_CP_ISNORM(q->cell.cp)) ? PBCH_RE_CP_NORM : PBCH_RE_CP_EXT;
if (srslte_precoding_init(&q->precoding, SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp))) { if (srslte_precoding_init(&q->precoding, SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp))) {
fprintf(stderr, "Error initializing precoding\n"); fprintf(stderr, "Error initializing precoding\n");
@ -326,32 +338,6 @@ void srslte_pbch_mib_pack(srslte_cell_t *cell, uint32_t sfn, uint8_t *msg) {
srslte_bit_pack(sfn >> 2, &msg, 8); srslte_bit_pack(sfn >> 2, &msg, 8);
} }
void srslte_pbch_mib_fprint(FILE *stream, srslte_cell_t *cell, uint32_t sfn, uint32_t cell_id) {
printf(" - Cell ID: %d\n", cell_id);
printf(" - Nof ports: %d\n", cell->nof_ports);
printf(" - PRB: %d\n", cell->nof_prb);
printf(" - PHICH Length: %s\n",
cell->phich_length == SRSLTE_PHICH_EXT ? "Extended" : "Normal");
printf(" - PHICH Resources: ");
switch (cell->phich_resources) {
case SRSLTE_PHICH_SRSLTE_PHICH_R_1_6:
printf("1/6");
break;
case SRSLTE_PHICH_SRSLTE_PHICH_R_1_2:
printf("1/2");
break;
case SRSLTE_PHICH_R_1:
printf("1");
break;
case SRSLTE_PHICH_R_2:
printf("2");
break;
}
printf("\n");
printf(" - SFN: %d\n", sfn);
}
void srslte_pbch_decode_reset(srslte_pbch_t *q) { void srslte_pbch_decode_reset(srslte_pbch_t *q) {
q->frame_idx = 0; q->frame_idx = 0;
} }
@ -359,9 +345,8 @@ void srslte_pbch_decode_reset(srslte_pbch_t *q) {
void srslte_crc_set_mask(uint8_t *data, int nof_ports) { void srslte_crc_set_mask(uint8_t *data, int nof_ports) {
int i; int i;
for (i = 0; i < 16; i++) { for (i = 0; i < 16; i++) {
data[BCH_PAYLOAD_LEN + i] = (data[BCH_PAYLOAD_LEN + i] + srslte_crc_mask[nof_ports - 1][i]) % 2; data[SRSLTE_BCH_PAYLOAD_LEN + i] = (data[SRSLTE_BCH_PAYLOAD_LEN + i] + srslte_crc_mask[nof_ports - 1][i]) % 2;
} }
} }
/* Checks CRC after applying the mask for the given number of ports. /* Checks CRC after applying the mask for the given number of ports.
@ -371,13 +356,13 @@ void srslte_crc_set_mask(uint8_t *data, int nof_ports) {
* Returns 0 if the data is correct, -1 otherwise * Returns 0 if the data is correct, -1 otherwise
*/ */
uint32_t srslte_pbch_crc_check(srslte_pbch_t *q, uint8_t *bits, uint32_t nof_ports) { uint32_t srslte_pbch_crc_check(srslte_pbch_t *q, uint8_t *bits, uint32_t nof_ports) {
uint8_t data[BCH_PAYLOADCRC_LEN]; uint8_t data[SRSLTE_BCH_PAYLOADCRC_LEN];
memcpy(data, bits, BCH_PAYLOADCRC_LEN * sizeof(uint8_t)); memcpy(data, bits, SRSLTE_BCH_PAYLOADCRC_LEN * sizeof(uint8_t));
srslte_crc_set_mask(data, nof_ports); srslte_crc_set_mask(data, nof_ports);
int ret = srslte_crc_checksum(&q->crc, data, BCH_PAYLOADCRC_LEN); int ret = srslte_crc_checksum(&q->crc, data, SRSLTE_BCH_PAYLOADCRC_LEN);
if (ret == 0) { if (ret == 0) {
uint32_t chkzeros=0; uint32_t chkzeros=0;
for (int i=0;i<BCH_PAYLOAD_LEN;i++) { for (int i=0;i<SRSLTE_BCH_PAYLOAD_LEN;i++) {
chkzeros += data[i]; chkzeros += data[i];
} }
if (chkzeros) { if (chkzeros) {
@ -411,10 +396,10 @@ int decode_frame(srslte_pbch_t *q, uint32_t src, uint32_t dst, uint32_t n,
} }
/* unrate matching */ /* unrate matching */
srslte_rm_conv_rx(q->temp, 4 * nof_bits, q->rm_f, BCH_ENCODED_LEN); srslte_rm_conv_rx(q->temp, 4 * nof_bits, q->rm_f, SRSLTE_BCH_ENCODED_LEN);
/* decode */ /* decode */
srslte_viterbi_decode_f(&q->decoder, q->rm_f, q->data, BCH_PAYLOADCRC_LEN); srslte_viterbi_decode_f(&q->decoder, q->rm_f, q->data, SRSLTE_BCH_PAYLOADCRC_LEN);
if (!srslte_pbch_crc_check(q, q->data, nof_ports)) { if (!srslte_pbch_crc_check(q, q->data, nof_ports)) {
return 1; return 1;
@ -432,7 +417,7 @@ int decode_frame(srslte_pbch_t *q, uint32_t src, uint32_t dst, uint32_t n,
* Returns 1 if successfully decoded MIB, 0 if not and -1 on error * Returns 1 if successfully decoded MIB, 0 if not and -1 on error
*/ */
int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRSLTE_MAX_PORTS], float noise_estimate, int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRSLTE_MAX_PORTS], float noise_estimate,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint32_t *nof_tx_ports, uint32_t *sfn_offset) uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN], uint32_t *nof_tx_ports, uint32_t *sfn_offset)
{ {
uint32_t src, dst, nb; uint32_t src, dst, nb;
uint32_t nant; uint32_t nant;
@ -478,7 +463,12 @@ int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRS
ret = 0; ret = 0;
/* Try decoding for 1 to cell.nof_ports antennas */ /* Try decoding for 1 to cell.nof_ports antennas */
for (nant = 1; nant <= q->cell.nof_ports && !ret; nant++) { if (q->search_all_ports) {
nant = 1;
} else {
nant = q->cell.nof_ports;
}
do {
if (nant != 3) { if (nant != 3) {
DEBUG("Trying %d TX antennas with %d frames\n", nant, q->frame_idx); DEBUG("Trying %d TX antennas with %d frames\n", nant, q->frame_idx);
@ -517,15 +507,16 @@ int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRS
*nof_tx_ports = nant; *nof_tx_ports = nant;
} }
if (bch_payload) { if (bch_payload) {
memcpy(bch_payload, q->data, sizeof(uint8_t) * BCH_PAYLOAD_LEN); memcpy(bch_payload, q->data, sizeof(uint8_t) * SRSLTE_BCH_PAYLOAD_LEN);
} }
} }
} }
} }
} }
} }
} nant++;
} while(nant <= q->cell.nof_ports && !ret);
/* If not found, make room for the next packet of radio frame symbols */ /* If not found, make room for the next packet of radio frame symbols */
if (q->frame_idx == 4) { if (q->frame_idx == 4) {
memmove(q->llr, &q->llr[nof_bits], nof_bits * 3 * sizeof(float)); memmove(q->llr, &q->llr[nof_bits], nof_bits * 3 * sizeof(float));
@ -537,7 +528,7 @@ int srslte_pbch_decode(srslte_pbch_t *q, cf_t *slot1_symbols, cf_t *ce_slot1[SRS
/** Converts the MIB message to symbols mapped to SLOT #1 ready for transmission /** Converts the MIB message to symbols mapped to SLOT #1 ready for transmission
*/ */
int srslte_pbch_encode(srslte_pbch_t *q, uint8_t bch_payload[BCH_PAYLOAD_LEN], cf_t *slot1_symbols[SRSLTE_MAX_PORTS]) { int srslte_pbch_encode(srslte_pbch_t *q, uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN], cf_t *slot1_symbols[SRSLTE_MAX_PORTS]) {
int i; int i;
int nof_bits; int nof_bits;
cf_t *x[SRSLTE_MAX_LAYERS]; cf_t *x[SRSLTE_MAX_LAYERS];
@ -560,15 +551,15 @@ int srslte_pbch_encode(srslte_pbch_t *q, uint8_t bch_payload[BCH_PAYLOAD_LEN], c
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (SRSLTE_MAX_LAYERS - q->cell.nof_ports)); memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (SRSLTE_MAX_LAYERS - q->cell.nof_ports));
if (q->frame_idx == 0) { if (q->frame_idx == 0) {
memcpy(q->data, bch_payload, sizeof(uint8_t) * BCH_PAYLOAD_LEN); memcpy(q->data, bch_payload, sizeof(uint8_t) * SRSLTE_BCH_PAYLOAD_LEN);
/* encode & modulate */ /* encode & modulate */
srslte_crc_attach(&q->crc, q->data, BCH_PAYLOAD_LEN); srslte_crc_attach(&q->crc, q->data, SRSLTE_BCH_PAYLOAD_LEN);
srslte_crc_set_mask(q->data, q->cell.nof_ports); srslte_crc_set_mask(q->data, q->cell.nof_ports);
srslte_convcoder_encode(&q->encoder, q->data, q->data_enc, BCH_PAYLOADCRC_LEN); srslte_convcoder_encode(&q->encoder, q->data, q->data_enc, SRSLTE_BCH_PAYLOADCRC_LEN);
srslte_rm_conv_tx(q->data_enc, BCH_ENCODED_LEN, q->rm_b, 4 * nof_bits); srslte_rm_conv_tx(q->data_enc, SRSLTE_BCH_ENCODED_LEN, q->rm_b, 4 * nof_bits);
} }
srslte_scrambling_b_offset(&q->seq, &q->rm_b[q->frame_idx * nof_bits], srslte_scrambling_b_offset(&q->seq, &q->rm_b[q->frame_idx * nof_bits],

8
srslte/lib/phch/test/pbch_file_test.c
Unescape Escape View File

@ -47,7 +47,7 @@ srslte_cell_t cell = {
int nof_frames = 1; int nof_frames = 1;
uint8_t bch_payload_file[BCH_PAYLOAD_LEN] = {0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; uint8_t bch_payload_file[SRSLTE_BCH_PAYLOAD_LEN] = {0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
#define FLEN (10*SRSLTE_SF_LEN(srslte_symbol_sz(cell.nof_prb))) #define FLEN (10*SRSLTE_SF_LEN(srslte_symbol_sz(cell.nof_prb)))
@ -171,7 +171,7 @@ void base_free() {
} }
int main(int argc, char **argv) { int main(int argc, char **argv) {
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
int n; int n;
uint32_t nof_tx_ports, sfn_offset; uint32_t nof_tx_ports, sfn_offset;
cf_t *ce_slot1[SRSLTE_MAX_PORTS]; cf_t *ce_slot1[SRSLTE_MAX_PORTS];
@ -231,8 +231,8 @@ int main(int argc, char **argv) {
exit(-1); exit(-1);
} else { } else {
printf("MIB decoded OK. Nof ports: %d. SFN offset: %d Payload: ", nof_tx_ports, sfn_offset); printf("MIB decoded OK. Nof ports: %d. SFN offset: %d Payload: ", nof_tx_ports, sfn_offset);
srslte_vec_fprint_hex(stdout, bch_payload, BCH_PAYLOAD_LEN); srslte_vec_fprint_hex(stdout, bch_payload, SRSLTE_BCH_PAYLOAD_LEN);
if (nof_tx_ports == 2 && sfn_offset == 0 && !memcmp(bch_payload, bch_payload_file, BCH_PAYLOAD_LEN)) { if (nof_tx_ports == 2 && sfn_offset == 0 && !memcmp(bch_payload, bch_payload_file, SRSLTE_BCH_PAYLOAD_LEN)) {
printf("This is the signal.1.92M.dat file\n"); printf("This is the signal.1.92M.dat file\n");
exit(0); exit(0);
} else { } else {

10
srslte/lib/phch/test/pbch_test.c
Unescape Escape View File

@ -77,7 +77,7 @@ void parse_args(int argc, char **argv) {
int main(int argc, char **argv) { int main(int argc, char **argv) {
srslte_pbch_t pbch; srslte_pbch_t pbch;
uint8_t bch_payload_tx[BCH_PAYLOAD_LEN], bch_payload_rx[BCH_PAYLOAD_LEN]; uint8_t bch_payload_tx[SRSLTE_BCH_PAYLOAD_LEN], bch_payload_rx[SRSLTE_BCH_PAYLOAD_LEN];
int i, j; int i, j;
cf_t *ce[SRSLTE_MAX_PORTS]; cf_t *ce[SRSLTE_MAX_PORTS];
int nof_re; int nof_re;
@ -111,7 +111,7 @@ int main(int argc, char **argv) {
} }
srand(time(NULL)); srand(time(NULL));
for (i=0;i<BCH_PAYLOAD_LEN;i++) { for (i=0;i<SRSLTE_BCH_PAYLOAD_LEN;i++) {
bch_payload_tx[i] = rand()%2; bch_payload_tx[i] = rand()%2;
} }
@ -138,11 +138,11 @@ int main(int argc, char **argv) {
} }
printf("Tx ports: %d - Rx ports: %d\n", cell.nof_ports, nof_rx_ports); printf("Tx ports: %d - Rx ports: %d\n", cell.nof_ports, nof_rx_ports);
printf("Tx payload: "); printf("Tx payload: ");
srslte_vec_fprint_hex(stdout, bch_payload_tx, BCH_PAYLOAD_LEN); srslte_vec_fprint_hex(stdout, bch_payload_tx, SRSLTE_BCH_PAYLOAD_LEN);
printf("Rx payload: "); printf("Rx payload: ");
srslte_vec_fprint_hex(stdout, bch_payload_rx, BCH_PAYLOAD_LEN); srslte_vec_fprint_hex(stdout, bch_payload_rx, SRSLTE_BCH_PAYLOAD_LEN);
if (nof_rx_ports == cell.nof_ports && !memcmp(bch_payload_rx, bch_payload_tx, sizeof(uint8_t) * BCH_PAYLOAD_LEN)) { if (nof_rx_ports == cell.nof_ports && !memcmp(bch_payload_rx, bch_payload_tx, sizeof(uint8_t) * SRSLTE_BCH_PAYLOAD_LEN)) {
printf("OK\n"); printf("OK\n");
exit(0); exit(0);
} else { } else {

26
srslte/lib/ue/src/ue_mib.c
Unescape Escape View File

@ -37,17 +37,26 @@
#include "srslte/utils/vector.h" #include "srslte/utils/vector.h"
int srslte_ue_mib_init(srslte_ue_mib_t * q, int srslte_ue_mib_init(srslte_ue_mib_t * q,
srslte_cell_t cell) srslte_cell_t cell)
{ {
int ret = SRSLTE_ERROR_INVALID_INPUTS; int ret = SRSLTE_ERROR_INVALID_INPUTS;
if (q != NULL && if (q != NULL &&
cell.nof_ports <= SRSLTE_UE_MIB_MAX_PORTS) cell.nof_ports <= SRSLTE_MAX_PORTS)
{ {
ret = SRSLTE_ERROR; ret = SRSLTE_ERROR;
bzero(q, sizeof(srslte_ue_mib_t)); bzero(q, sizeof(srslte_ue_mib_t));
if (srslte_pbch_init(&q->pbch, cell)) {
fprintf(stderr, "Error initiating PBCH\n");
goto clean_exit;
}
if (cell.nof_ports == 0) {
cell.nof_ports = SRSLTE_MAX_PORTS;
}
q->sf_symbols = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t)); q->sf_symbols = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
if (!q->sf_symbols) { if (!q->sf_symbols) {
perror("malloc"); perror("malloc");
@ -70,10 +79,6 @@ int srslte_ue_mib_init(srslte_ue_mib_t * q,
fprintf(stderr, "Error initializing reference signal\n"); fprintf(stderr, "Error initializing reference signal\n");
goto clean_exit; goto clean_exit;
} }
if (srslte_pbch_init(&q->pbch, cell)) {
fprintf(stderr, "Error initiating PBCH\n");
goto clean_exit;
}
srslte_ue_mib_reset(q); srslte_ue_mib_reset(q);
ret = SRSLTE_SUCCESS; ret = SRSLTE_SUCCESS;
@ -91,7 +96,7 @@ void srslte_ue_mib_free(srslte_ue_mib_t * q)
if (q->sf_symbols) { if (q->sf_symbols) {
free(q->sf_symbols); free(q->sf_symbols);
} }
for (int i=0;i<SRSLTE_UE_MIB_MAX_PORTS;i++) { for (int i=0;i<SRSLTE_MAX_PORTS;i++) {
if (q->ce[i]) { if (q->ce[i]) {
free(q->ce[i]); free(q->ce[i]);
} }
@ -113,7 +118,7 @@ void srslte_ue_mib_reset(srslte_ue_mib_t * q)
} }
int srslte_ue_mib_decode(srslte_ue_mib_t * q, cf_t *input, int srslte_ue_mib_decode(srslte_ue_mib_t * q, cf_t *input,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint32_t *nof_tx_ports, uint32_t *sfn_offset) uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN], uint32_t *nof_tx_ports, uint32_t *sfn_offset)
{ {
int ret = SRSLTE_SUCCESS; int ret = SRSLTE_SUCCESS;
cf_t *ce_slot1[SRSLTE_MAX_PORTS]; cf_t *ce_slot1[SRSLTE_MAX_PORTS];
@ -163,7 +168,8 @@ int srslte_ue_mib_sync_init(srslte_ue_mib_sync_t *q,
void *stream_handler) void *stream_handler)
{ {
srslte_cell_t cell; srslte_cell_t cell;
cell.nof_ports = SRSLTE_UE_MIB_MAX_PORTS; // If the ports are set to 0, ue_mib goes through 1, 2 and 4 ports to blindly detect nof_ports
cell.nof_ports = 0;
cell.id = cell_id; cell.id = cell_id;
cell.cp = cp; cell.cp = cp;
cell.nof_prb = SRSLTE_UE_MIB_NOF_PRB; cell.nof_prb = SRSLTE_UE_MIB_NOF_PRB;
@ -193,7 +199,7 @@ void srslte_ue_mib_sync_reset(srslte_ue_mib_sync_t * q) {
int srslte_ue_mib_sync_decode(srslte_ue_mib_sync_t * q, int srslte_ue_mib_sync_decode(srslte_ue_mib_sync_t * q,
uint32_t max_frames_timeout, uint32_t max_frames_timeout,
uint8_t bch_payload[BCH_PAYLOAD_LEN], uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
uint32_t *nof_tx_ports, uint32_t *nof_tx_ports,
uint32_t *sfn_offset) uint32_t *sfn_offset)
{ {

4
srslte/tutorial_examples/ue_rx.c
Unescape Escape View File

@ -247,7 +247,7 @@ int main(int argc, char **argv) {
#endif #endif
uint32_t nof_trials = 0; uint32_t nof_trials = 0;
int n; int n;
uint8_t bch_payload[BCH_PAYLOAD_LEN]; uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
uint32_t sfn_offset; uint32_t sfn_offset;
parse_args(&prog_args, argc, argv); parse_args(&prog_args, argc, argv);
@ -393,7 +393,7 @@ int main(int argc, char **argv) {
exit(-1); exit(-1);
} else if (n == SRSLTE_UE_MIB_FOUND) { } else if (n == SRSLTE_UE_MIB_FOUND) {
srslte_pbch_mib_unpack(bch_payload, &cell, &sfn); srslte_pbch_mib_unpack(bch_payload, &cell, &sfn);
srslte_pbch_mib_fprint(stdout, &cell, sfn, cell.id); srslte_cell_fprint(stdout, &cell, sfn);
printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset); printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset);
sfn = (sfn + sfn_offset)%1024; sfn = (sfn + sfn_offset)%1024;
state = DECODE_PDSCH; state = DECODE_PDSCH;

Write Preview
Loading…
Cancel
Save