int srslte_ue_dl_decode_mbsfn(srslte_ue_dl_t * q,
uint8_t *data,
uint32_t tti)
{
srslte_ra_dl_grant_t grant;
int ret = SRSLTE_ERROR;
uint32_t cfi;
uint32_t sf_idx = tti%10;
if ((ret = srslte_ue_dl_decode_fft_estimate_mbsfn(q, sf_idx, &cfi, SRSLTE_SF_MBSFN)) < 0) {
return ret;
}
float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
// Uncoment next line to do ZF by default in pdsch_ue example
//float noise_estimate = 0;
grant.sf_type = SRSLTE_SF_MBSFN;
grant.mcs[0].idx = 2;
grant.tb_en[0] = true;
grant.tb_en[1] = false;
grant.nof_prb = q->pmch.cell.nof_prb;
srslte_dl_fill_ra_mcs(&grant.mcs[0], grant.nof_prb);
srslte_softbuffer_rx_reset_tbs(q->softbuffers[0], (uint32_t) grant.mcs[0].tbs);
for(int j = 0; j < 2; j++){
for(int f = 0; f < grant.nof_prb; f++){
grant.prb_idx[j][f] = true;
}
}
grant.Qm[0] = srslte_mod_bits_x_symbol(grant.mcs[0].mod);
// redundancy version is set to 0 for the PMCH
if (srslte_ue_dl_cfg_grant(q, &grant, cfi, sf_idx, SRSLTE_PMCH_RV, SRSLTE_MIMO_TYPE_SINGLE_ANTENNA)) {
return SRSLTE_ERROR;
}
if (q->pmch_cfg.grant.mcs[0].mod > 0 && q->pmch_cfg.grant.mcs[0].tbs >= 0) {
ret = srslte_pmch_decode_multi(&q->pmch, &q->pmch_cfg, q->softbuffers[0],
q->sf_symbols_m, q->ce_m,
noise_estimate,
q->current_mbsfn_area_id, data);
if (ret == SRSLTE_ERROR) {
q->pmch_pkt_errors++;
} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
fprintf(stderr, "Error calling srslte_pmch_decode()\n");
}
}
q->pmch_pkts_total++;
if (ret == SRSLTE_SUCCESS) {
return q->pmch_cfg.grant.mcs[0].tbs;
} else {
return 0;
}
}
int srslte_ue_dl_decode_rnti_rv_packet(srslte_ue_dl_t *q, srslte_ra_dl_grant_t *grant, uint8_t *data,
uint32_t cfi, uint32_t sf_idx, uint16_t rnti, uint32_t rvidx)
{
int ret = SRSLTE_ERROR;
q->nof_detected++;
/* Setup PDSCH configuration for this CFI, SFIDX and RVIDX */
if (srslte_ue_dl_cfg_grant(q, grant, cfi, sf_idx, rvidx)) {
return SRSLTE_ERROR;
}
if (q->pdsch_cfg.rv == 0) {
srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant->mcs.tbs);
}
// Uncoment next line to do ZF by default in pdsch_ue example
//float noise_estimate = 0;
float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
if (q->pdsch_cfg.grant.mcs.mod > 0 && q->pdsch_cfg.grant.mcs.tbs >= 0) {
ret = srslte_pdsch_decode_rnti(&q->pdsch, &q->pdsch_cfg, &q->softbuffer,
q->sf_symbols, q->ce,
noise_estimate,
rnti, data);
if (ret == SRSLTE_ERROR) {
q->pkt_errors++;
} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
fprintf(stderr, "Error calling srslte_pdsch_decode()\n");
} else if (ret == SRSLTE_SUCCESS) {
if (SRSLTE_VERBOSE_ISDEBUG()) {
INFO("Decoded Message: ", 0);
srslte_vec_fprint_hex(stdout, data, q->pdsch_cfg.grant.mcs.tbs);
}
}
q->pkts_total++;
}
return ret;
}
int main(int argc, char **argv) {
uint32_t i, j, k;
int ret = -1;
struct timeval t[3];
srslte_softbuffer_tx_t *softbuffers_tx[SRSLTE_MAX_CODEWORDS];
int M=1;
parse_args(argc,argv);
/* Initialise to zeros */
bzero(&pmch_tx, sizeof(srslte_pmch_t));
bzero(&pmch_rx, sizeof(srslte_pmch_t));
bzero(&pmch_cfg, sizeof(srslte_pdsch_cfg_t));
bzero(ce, sizeof(cf_t*)*SRSLTE_MAX_PORTS);
bzero(tx_slot_symbols, sizeof(cf_t*)*SRSLTE_MAX_PORTS);
bzero(rx_slot_symbols, sizeof(cf_t*)*SRSLTE_MAX_PORTS);
cell.nof_ports = 1;
srslte_ra_dl_dci_t dci;
bzero(&dci, sizeof(srslte_ra_dl_dci_t));
dci.type0_alloc.rbg_bitmask = 0xffffffff;
/* If transport block 0 is enabled */
grant.tb_en[0] = true;
grant.tb_en[1] = false;
grant.mcs[0].idx = mcs_idx;
grant.nof_prb = cell.nof_prb;
grant.sf_type = SRSLTE_SF_MBSFN;
srslte_dl_fill_ra_mcs(&grant.mcs[0], cell.nof_prb);
grant.Qm[0] = srslte_mod_bits_x_symbol(grant.mcs[0].mod);
for(int i = 0; i < 2; i++){
for(int j = 0; j < grant.nof_prb; j++){
grant.prb_idx[i][j] = true;
}
}
/* init memory */
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
for (j = 0; j < SRSLTE_MAX_PORTS; j++) {
ce[i][j] = srslte_vec_malloc(sizeof(cf_t) * NOF_CE_SYMBOLS);
if (!ce[i][j]) {
perror("srslte_vec_malloc");
goto quit;
}
for (k = 0; k < NOF_CE_SYMBOLS; k++) {
ce[i][j][k] = (i == j) ? 1.0f : 0.0f;
}
}
rx_slot_symbols[i] = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp));
if (!rx_slot_symbols[i]) {
perror("srslte_vec_malloc");
goto quit;
}
}
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
softbuffers_tx[i] = calloc(sizeof(srslte_softbuffer_tx_t), 1);
if (!softbuffers_tx[i]) {
fprintf(stderr, "Error allocating TX soft buffer\n");
}
if (srslte_softbuffer_tx_init(softbuffers_tx[i], cell.nof_prb)) {
fprintf(stderr, "Error initiating TX soft buffer\n");
goto quit;
}
}
for (i = 0; i < cell.nof_ports; i++) {
tx_slot_symbols[i] = calloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp), sizeof(cf_t));
if (!tx_slot_symbols[i]) {
perror("srslte_vec_malloc");
goto quit;
}
}
for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (grant.tb_en[i]) {
data_tx[i] = srslte_vec_malloc(sizeof(uint8_t) * grant.mcs[i].tbs);
if (!data_tx[i]) {
perror("srslte_vec_malloc");
goto quit;
}
bzero(data_tx[i], sizeof(uint8_t) * grant.mcs[i].tbs);
data_rx[i] = srslte_vec_malloc(sizeof(uint8_t) * grant.mcs[i].tbs);
if (!data_rx[i]) {
perror("srslte_vec_malloc");
goto quit;
}
bzero(data_rx[i], sizeof(uint8_t) * grant.mcs[i].tbs);
}
}
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
softbuffers_rx[i] = calloc(sizeof(srslte_softbuffer_rx_t), 1);
if (!softbuffers_rx[i]) {
fprintf(stderr, "Error allocating RX soft buffer\n");
goto quit;
}
if (srslte_softbuffer_rx_init(softbuffers_rx[i], cell.nof_prb)) {
fprintf(stderr, "Error initiating RX soft buffer\n");
goto quit;
}
}
#ifdef DO_OFDM
for (i = 0; i < cell.nof_ports; i++) {
tx_sf_symbols[i] = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_SF_LEN_PRB(cell.nof_prb));
if (srslte_ofdm_tx_init_mbsfn(&ifft_mbsfn[i], SRSLTE_CP_EXT, tx_slot_symbols[i], tx_sf_symbols[i], cell.nof_prb)) {
fprintf(stderr, "Error creating iFFT object\n");
exit(-1);
}
srslte_ofdm_set_non_mbsfn_region(&ifft_mbsfn[i], non_mbsfn_region);
srslte_ofdm_set_normalize(&ifft_mbsfn[i], true);
}
for (i = 0; i < nof_rx_antennas; i++) {
rx_sf_symbols[i] = srslte_vec_malloc(sizeof(cf_t) * SRSLTE_SF_LEN_PRB(cell.nof_prb));
if (srslte_ofdm_rx_init_mbsfn(&fft_mbsfn[i], SRSLTE_CP_EXT, rx_sf_symbols[i], rx_slot_symbols[i], cell.nof_prb)) {
fprintf(stderr, "Error creating iFFT object\n");
exit(-1);
}
srslte_ofdm_set_non_mbsfn_region(&fft_mbsfn[i], non_mbsfn_region);
srslte_ofdm_set_normalize(&fft_mbsfn[i], true);
}
#endif /* DO_OFDM */
/* Configure PDSCH */
if (srslte_pmch_cfg(&pmch_cfg, cell, &grant, cfi, subframe)) {
fprintf(stderr, "Error configuring PMCH\n");
exit(-1);
}
if (srslte_pmch_cfg(&pmch_cfg, cell, &grant, cfi, subframe)) {
fprintf(stderr, "Error configuring PMCH\n");
exit(-1);
}
INFO(" Global:\n");
INFO(" nof_prb=%d\n", cell.nof_prb);
INFO(" nof_ports=%d\n", cell.nof_ports);
INFO(" id=%d\n", cell.id);
INFO(" cp=%s\n", srslte_cp_string(cell.cp));
INFO(" phich_length=%d\n", (int) cell.phich_length);
INFO(" phich_resources=%d\n", (int) cell.phich_resources);
INFO(" nof_prb=%d\n", pmch_cfg.grant.nof_prb);
INFO(" sf_idx=%d\n", pmch_cfg.sf_idx);
INFO(" mimo_type=%s\n", srslte_mimotype2str(pmch_cfg.mimo_type));
INFO(" nof_layers=%d\n", pmch_cfg.nof_layers);
INFO(" nof_tb=%d\n", SRSLTE_RA_DL_GRANT_NOF_TB(&pmch_cfg.grant));
INFO(" Qm=%d\n", pmch_cfg.grant.Qm[0]);
INFO(" mcs.idx=0x%X\n", pmch_cfg.grant.mcs[0].idx);
INFO(" mcs.tbs=%d\n", pmch_cfg.grant.mcs[0].tbs);
INFO(" mcs.mod=%s\n", srslte_mod_string(pmch_cfg.grant.mcs[0].mod));
INFO(" rv=%d\n", pmch_cfg.rv[0]);
INFO(" lstart=%d\n", pmch_cfg.nbits[0].lstart);
INFO(" nof_bits=%d\n", pmch_cfg.nbits[0].nof_bits);
INFO(" nof_re=%d\n", pmch_cfg.nbits[0].nof_re);
INFO(" nof_symb=%d\n", pmch_cfg.nbits[0].nof_symb);
if (srslte_pmch_init(&pmch_tx, cell.nof_prb)) {
fprintf(stderr, "Error creating PMCH object\n");
}
srslte_pmch_set_area_id(&pmch_tx, mbsfn_area_id);
if (srslte_pmch_init(&pmch_rx, cell.nof_prb)) {
fprintf(stderr, "Error creating PMCH object\n");
}
srslte_pmch_set_area_id(&pmch_rx, mbsfn_area_id);
for (int tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
if (grant.tb_en[tb]) {
for (int byte = 0; byte < grant.mcs[tb].tbs / 8; byte++) {
data_tx[tb][byte] = (uint8_t) (rand() % 256);
}
}
}
if (srslte_pmch_encode(&pmch_tx, &pmch_cfg, softbuffers_tx[0], data_tx[0], mbsfn_area_id, tx_slot_symbols)) {
fprintf(stderr, "Error encoding PDSCH\n");
exit(-1);
}
gettimeofday(&t[2], NULL);
get_time_interval(t);
printf("ENCODED in %.2f (PHY bitrate=%.2f Mbps. Processing bitrate=%.2f Mbps)\n",
(float) t[0].tv_usec/M, (float) (grant.mcs[0].tbs + grant.mcs[1].tbs)/1000.0f,
(float) (grant.mcs[0].tbs + grant.mcs[1].tbs)*M/t[0].tv_usec);
#ifdef DO_OFDM
for (i = 0; i < cell.nof_ports; i++) {
/* For each Tx antenna modulate OFDM */
srslte_ofdm_tx_sf(&ifft_mbsfn[i]);
}
/* combine outputs */
for (j = 0; j < nof_rx_antennas; j++) {
for (k = 0; k < NOF_CE_SYMBOLS; k++) {
rx_sf_symbols[j][k] = 0.0f;
for (i = 0; i < cell.nof_ports; i++) {
rx_sf_symbols[j][k] += tx_sf_symbols[i][k] * ce[i][j][k];
}
}
}
#else
/* combine outputs */
for (j = 0; j < nof_rx_antennas; j++) {
for (k = 0; k < SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp); k++) {
rx_slot_symbols[j][k] = 0.0f;
for (i = 0; i < cell.nof_ports; i++) {
rx_slot_symbols[j][k] += tx_slot_symbols[i][k] * ce[i][j][k];
}
}
}
#endif
int r=0;
gettimeofday(&t[1], NULL);
#ifdef DO_OFDM
/* For each Rx antenna demodulate OFDM */
for (i = 0; i < nof_rx_antennas; i++) {
srslte_ofdm_rx_sf(&fft_mbsfn[i]);
}
#endif
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (grant.tb_en[i]) {
srslte_softbuffer_rx_reset_tbs(softbuffers_rx[i], (uint32_t) grant.mcs[i].tbs);
}
}
r = srslte_pmch_decode(&pmch_rx, &pmch_cfg, softbuffers_rx[0],rx_slot_symbols[0], ce[0],0,mbsfn_area_id, data_rx[0]);
gettimeofday(&t[2], NULL);
get_time_interval(t);
printf("DECODED %s in %.2f (PHY bitrate=%.2f Mbps. Processing bitrate=%.2f Mbps)\n", r?"Error":"OK",
(float) t[0].tv_usec/M, (float) (grant.mcs[0].tbs + grant.mcs[1].tbs)/1000.0f,
(float) (grant.mcs[0].tbs + grant.mcs[1].tbs)*M/t[0].tv_usec);
/* If there is an error in PDSCH decode */
if (r) {
ret = -1;
goto quit;
}
/* Check Tx and Rx bytes */
for (int tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
if (grant.tb_en[tb]) {
for (int byte = 0; byte < grant.mcs[tb].tbs / 8; byte++) {
if (data_tx[tb][byte] != data_rx[tb][byte]) {
ERROR("Found BYTE error in TB %d (%02X != %02X), quiting...", tb, data_tx[tb][byte], data_rx[tb][byte]);
ret = SRSLTE_ERROR;
goto quit;
}
}
}
}
ret = SRSLTE_SUCCESS;
quit:
srslte_pmch_free(&pmch_tx);
srslte_pmch_free(&pmch_rx);
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
srslte_softbuffer_tx_free(softbuffers_tx[i]);
if (softbuffers_tx[i]) {
free(softbuffers_tx[i]);
}
srslte_softbuffer_rx_free(softbuffers_rx[i]);
if (softbuffers_rx[i]) {
free(softbuffers_rx[i]);
}
if (data_tx[i]) {
free(data_tx[i]);
}
if (data_rx[i]) {
free(data_rx[i]);
}
}
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
for (j = 0; j < SRSLTE_MAX_PORTS; j++) {
if (ce[i][j]) {
free(ce[i][j]);
}
}
if (tx_slot_symbols[i]) {
free(tx_slot_symbols[i]);
}
if (rx_slot_symbols[i]) {
free(rx_slot_symbols[i]);
}
}
if (ret) {
printf("Error\n");
} else {
printf("Ok\n");
}
exit(ret);
}
int srslte_ue_dl_find_and_decode(srslte_ue_dl_t* q,
srslte_dl_sf_cfg_t* sf,
srslte_ue_dl_cfg_t* cfg,
srslte_pdsch_cfg_t* pdsch_cfg,
uint8_t* data[SRSLTE_MAX_CODEWORDS],
bool acks[SRSLTE_MAX_CODEWORDS])
{
int ret = SRSLTE_ERROR;
srslte_dci_dl_t dci_dl;
srslte_pmch_cfg_t pmch_cfg;
srslte_pdsch_res_t pdsch_res[SRSLTE_MAX_CODEWORDS];
// Use default values for PDSCH decoder
ZERO_OBJECT(pmch_cfg);
uint32_t mi_set_len;
if (q->cell.frame_type == SRSLTE_TDD && !sf->tdd_config.configured) {
mi_set_len = 3;
} else {
mi_set_len = 1;
}
// Blind search PHICH mi value
ZERO_OBJECT(dci_dl);
ret = 0;
for (uint32_t i = 0; i < mi_set_len && !ret; i++) {
if (mi_set_len == 1) {
srslte_ue_dl_set_mi_auto(q);
} else {
srslte_ue_dl_set_mi_manual(q, i);
}
if ((ret = srslte_ue_dl_decode_fft_estimate(q, sf, cfg)) < 0) {
return ret;
}
ret = srslte_ue_dl_find_dl_dci(q, sf, cfg, pdsch_cfg->rnti, &dci_dl);
}
if (ret == 1) {
// Logging
char str[512];
srslte_dci_dl_info(&dci_dl, str, 512);
INFO("PDCCH: %s, snr=%.1f dB\n", str, q->chest_res.snr_db);
// Force known MBSFN grant
if (sf->sf_type == SRSLTE_SF_MBSFN) {
dci_dl.rnti = SRSLTE_MRNTI;
dci_dl.alloc_type = SRSLTE_RA_ALLOC_TYPE0;
dci_dl.type0_alloc.rbg_bitmask = 0xffffffff;
dci_dl.tb[0].rv = 0;
dci_dl.tb[0].mcs_idx = 2;
dci_dl.format = SRSLTE_DCI_FORMAT1;
}
// Convert DCI message to DL grant
if (srslte_ue_dl_dci_to_pdsch_grant(q, sf, cfg, &dci_dl, &pdsch_cfg->grant)) {
ERROR("Error unpacking DCI\n");
return SRSLTE_ERROR;
}
// Calculate RV if not provided in the grant and reset softbuffer
for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (pdsch_cfg->grant.tb[i].enabled) {
if (pdsch_cfg->grant.tb[i].rv < 0) {
uint32_t sfn = sf->tti / 10;
uint32_t k = (sfn / 2) % 4;
pdsch_cfg->grant.tb[i].rv = ((uint32_t)ceilf((float)1.5 * k)) % 4;
}
srslte_softbuffer_rx_reset_tbs(pdsch_cfg->softbuffers.rx[i], (uint32_t)pdsch_cfg->grant.tb[i].tbs);
}
}
bool decode_enable = false;
for (uint32_t tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
if (pdsch_cfg->grant.tb[tb].enabled) {
decode_enable = true;
pdsch_res[tb].payload = data[tb];
pdsch_res[tb].crc = false;
}
}
if (decode_enable) {
if (sf->sf_type == SRSLTE_SF_NORM) {
if (srslte_ue_dl_decode_pdsch(q, sf, pdsch_cfg, pdsch_res)) {
ERROR("ERROR: Decoding PDSCH\n");
ret = -1;
}
} else {
pmch_cfg.pdsch_cfg = *pdsch_cfg;
if (srslte_ue_dl_decode_pmch(q, sf, &pmch_cfg, pdsch_res)) {
ERROR("Decoding PMCH\n");
ret = -1;
}
}
}
for (uint32_t tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
if (pdsch_cfg->grant.tb[tb].enabled) {
acks[tb] = pdsch_res[tb].crc;
}
}
}
return ret;
}
int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q,
uint8_t *data[SRSLTE_MAX_CODEWORDS], uint32_t tm, uint32_t tti, uint16_t rnti,
bool acks[SRSLTE_MAX_CODEWORDS]) {
srslte_mimo_type_t mimo_type;
srslte_dci_msg_t dci_msg;
srslte_ra_dl_dci_t dci_unpacked;
srslte_ra_dl_grant_t grant;
int ret = SRSLTE_ERROR;
uint32_t cfi;
uint32_t sf_idx = tti%10;
if ((ret = srslte_ue_dl_decode_fft_estimate_mbsfn(q, sf_idx, &cfi, SRSLTE_SF_NORM)) < 0) {
return ret;
}
float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
// Uncoment next line to do ZF by default in pdsch_ue example
//float noise_estimate = 0;
if (srslte_pdcch_extract_llr_multi(&q->pdcch, q->sf_symbols_m, q->ce_m, noise_estimate, sf_idx, cfi)) {
fprintf(stderr, "Error extracting LLRs\n");
return SRSLTE_ERROR;
}
int found_dci = srslte_ue_dl_find_dl_dci(q, tm, cfi, sf_idx, rnti, &dci_msg);
if (found_dci == 1) {
if (srslte_dci_msg_to_dl_grant(&dci_msg, rnti, q->cell.nof_prb, q->cell.nof_ports, &dci_unpacked, &grant)) {
fprintf(stderr, "Error unpacking DCI\n");
return SRSLTE_ERROR;
}
/* ===== These lines of code are supposed to be MAC functionality === */
int rvidx[SRSLTE_MAX_CODEWORDS] = {1};
if (dci_unpacked.rv_idx < 0) {
uint32_t sfn = tti / 10;
uint32_t k = (sfn / 2) % 4;
for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (grant.tb_en[i]) {
rvidx[i] = ((uint32_t) ceilf((float) 1.5 * k)) % 4;
srslte_softbuffer_rx_reset_tbs(q->softbuffers[i], (uint32_t) grant.mcs[i].tbs);
}
}
} else {
for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (grant.tb_en[i]) {
switch (i) {
case 0:
rvidx[i] = (uint32_t) dci_unpacked.rv_idx;
break;
case 1:
rvidx[i] = (uint32_t) dci_unpacked.rv_idx_1;
break;
default:
ERROR("Wrong number of transport blocks");
return SRSLTE_ERROR;
}
srslte_softbuffer_rx_reset_tbs(q->softbuffers[i], (uint32_t) grant.mcs[i].tbs);
}
}
}
switch(dci_msg.format) {
case SRSLTE_DCI_FORMAT1:
case SRSLTE_DCI_FORMAT1A:
case SRSLTE_DCI_FORMAT1C:
if (q->cell.nof_ports == 1) {
mimo_type = SRSLTE_MIMO_TYPE_SINGLE_ANTENNA;
} else {
mimo_type = SRSLTE_MIMO_TYPE_TX_DIVERSITY;
}
break;
case SRSLTE_DCI_FORMAT2:
if (SRSLTE_RA_DL_GRANT_NOF_TB(&grant) == 1 && dci_unpacked.pinfo == 0) {
mimo_type = SRSLTE_MIMO_TYPE_TX_DIVERSITY;
} else {
mimo_type = SRSLTE_MIMO_TYPE_SPATIAL_MULTIPLEX;
}
break;
case SRSLTE_DCI_FORMAT2A:
if (SRSLTE_RA_DL_GRANT_NOF_TB(&grant) == 1 && dci_unpacked.pinfo == 0) {
mimo_type = SRSLTE_MIMO_TYPE_TX_DIVERSITY;
} else {
mimo_type = SRSLTE_MIMO_TYPE_CDD;
}
break;
/* Not implemented formats */
case SRSLTE_DCI_FORMAT0:
case SRSLTE_DCI_FORMAT1B:
case SRSLTE_DCI_FORMAT1D:
case SRSLTE_DCI_FORMAT2B:
default:
ERROR("Transmission mode not supported.");
return SRSLTE_ERROR;
}
if (srslte_ue_dl_cfg_grant(q, &grant, cfi, sf_idx, rvidx, mimo_type)) {
ERROR("Configuing PDSCH");
return SRSLTE_ERROR;
}
/* ===== End of MAC functionality ========== */
q->nof_detected++;
if (q->pdsch_cfg.grant.mcs[0].mod > 0 && q->pdsch_cfg.grant.mcs[0].tbs >= 0) {
ret = srslte_pdsch_decode(&q->pdsch, &q->pdsch_cfg, q->softbuffers,
q->sf_symbols_m, q->ce_m,
noise_estimate,
rnti, data, acks);
for (int tb = 0; tb < SRSLTE_MAX_TB; tb++) {
if (grant.tb_en[tb]) {
if (!acks[tb]) {
q->pdsch_pkt_errors++;
}
q->pdsch_pkts_total++;
}
}
if (ret == SRSLTE_ERROR) {
} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
fprintf(stderr, "Error calling srslte_pdsch_decode()\n");
}
/* If we are in TM4 (Closed-Loop MIMO), compute condition number */
}
/*
printf("Saving signal...\n");
srslte_vec_save_file("input", input, sizeof(cf_t)*SRSLTE_SF_LEN_PRB(q->cell.nof_prb));
srslte_ue_dl_save_signal(q, &q->softbuffer, sf_idx, rvidx, rnti, cfi);
//exit(-1);
*/
}
if (found_dci == 1 && ret == SRSLTE_SUCCESS) {
return q->pdsch_cfg.grant.mcs[0].tbs;
} else {
return 0;
}
}
