int srslte_ue_dl_init(srslte_ue_dl_t* q, cf_t* in_buffer[SRSLTE_MAX_PORTS], uint32_t max_prb, uint32_t nof_rx_antennas) { int ret = SRSLTE_ERROR_INVALID_INPUTS; if (q != NULL && nof_rx_antennas <= SRSLTE_MAX_PORTS) { ret = SRSLTE_ERROR; bzero(q, sizeof(srslte_ue_dl_t)); q->pending_ul_dci_count = 0; q->nof_rx_antennas = nof_rx_antennas; q->mi_auto = true; q->mi_manual_index = 0; q->pregen_rnti = 0; for (int j = 0; j < SRSLTE_MAX_PORTS; j++) { q->sf_symbols[j] = srslte_vec_malloc(MAX_SFLEN_RE * sizeof(cf_t)); if (!q->sf_symbols[j]) { perror("malloc"); goto clean_exit; } } for (int i = 0; i < nof_rx_antennas; i++) { if (srslte_ofdm_rx_init(&q->fft[i], SRSLTE_CP_NORM, in_buffer[i], q->sf_symbols[i], max_prb)) { ERROR("Error initiating FFT\n"); goto clean_exit; } } if (srslte_ofdm_rx_init_mbsfn(&q->fft_mbsfn, SRSLTE_CP_EXT, in_buffer[0], q->sf_symbols[0], max_prb)) { ERROR("Error initiating FFT for MBSFN subframes \n"); goto clean_exit; } srslte_ofdm_set_non_mbsfn_region(&q->fft_mbsfn, 2); // Set a default to init if (srslte_chest_dl_init(&q->chest, max_prb, nof_rx_antennas)) { ERROR("Error initiating channel estimator\n"); goto clean_exit; } if (srslte_chest_dl_res_init(&q->chest_res, max_prb)) { ERROR("Error initiating channel estimator\n"); goto clean_exit; } if (srslte_pcfich_init(&q->pcfich, nof_rx_antennas)) { ERROR("Error creating PCFICH object\n"); goto clean_exit; } if (srslte_phich_init(&q->phich, nof_rx_antennas)) { ERROR("Error creating PHICH object\n"); goto clean_exit; } if (srslte_pdcch_init_ue(&q->pdcch, max_prb, nof_rx_antennas)) { ERROR("Error creating PDCCH object\n"); goto clean_exit; } if (srslte_pdsch_init_ue(&q->pdsch, max_prb, nof_rx_antennas)) { ERROR("Error creating PDSCH object\n"); goto clean_exit; } if (srslte_pmch_init(&q->pmch, max_prb, nof_rx_antennas)) { ERROR("Error creating PMCH object\n"); goto clean_exit; } ret = SRSLTE_SUCCESS; } else { ERROR("Invalid parameters\n"); } clean_exit: if (ret == SRSLTE_ERROR) { srslte_ue_dl_free(q); } 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_init(srslte_ue_dl_t *q, cf_t *in_buffer[SRSLTE_MAX_PORTS], uint32_t max_prb, uint32_t nof_rx_antennas) { int ret = SRSLTE_ERROR_INVALID_INPUTS; if (q != NULL && nof_rx_antennas <= SRSLTE_MAX_PORTS) { ret = SRSLTE_ERROR; bzero(q, sizeof(srslte_ue_dl_t)); q->pdsch_pkt_errors = 0; q->pdsch_pkts_total = 0; q->pmch_pkt_errors = 0; q->pmch_pkts_total = 0; q->pending_ul_dci_rnti = 0; q->sample_offset = 0; q->nof_rx_antennas = nof_rx_antennas; for (int j = 0; j < SRSLTE_MAX_PORTS; j++) { q->sf_symbols_m[j] = srslte_vec_malloc(MAX_SFLEN_RE * sizeof(cf_t)); if (!q->sf_symbols_m[j]) { perror("malloc"); goto clean_exit; } for (uint32_t i=0;i<SRSLTE_MAX_PORTS;i++) { q->ce_m[i][j] = srslte_vec_malloc(MAX_SFLEN_RE * sizeof(cf_t)); if (!q->ce_m[i][j]) { perror("malloc"); goto clean_exit; } bzero(q->ce_m[i][j], MAX_SFLEN_RE * sizeof(cf_t)); } } q->sf_symbols = q->sf_symbols_m[0]; for (int i=0;i<SRSLTE_MAX_PORTS;i++) { q->ce[i] = q->ce_m[i][0]; } for (int i = 0; i < nof_rx_antennas; i++) { if (srslte_ofdm_rx_init(&q->fft[i], SRSLTE_CP_NORM, in_buffer[i], q->sf_symbols_m[i], max_prb)) { fprintf(stderr, "Error initiating FFT\n"); goto clean_exit; } } if (srslte_ofdm_rx_init_mbsfn(&q->fft_mbsfn, SRSLTE_CP_EXT, in_buffer[0], q->sf_symbols_m[0], max_prb)) { fprintf(stderr, "Error initiating FFT for MBSFN subframes \n"); goto clean_exit; } srslte_ofdm_set_non_mbsfn_region(&q->fft_mbsfn, 2); // Set a default to init if (srslte_chest_dl_init(&q->chest, max_prb)) { fprintf(stderr, "Error initiating channel estimator\n"); goto clean_exit; } if (srslte_pcfich_init(&q->pcfich, nof_rx_antennas)) { fprintf(stderr, "Error creating PCFICH object\n"); goto clean_exit; } if (srslte_phich_init(&q->phich, nof_rx_antennas)) { fprintf(stderr, "Error creating PHICH object\n"); goto clean_exit; } if (srslte_pdcch_init_ue(&q->pdcch, max_prb, nof_rx_antennas)) { fprintf(stderr, "Error creating PDCCH object\n"); goto clean_exit; } if (srslte_pdsch_init_ue(&q->pdsch, max_prb, nof_rx_antennas)) { fprintf(stderr, "Error creating PDSCH object\n"); goto clean_exit; } if (srslte_pmch_init_multi(&q->pmch, max_prb, nof_rx_antennas)) { fprintf(stderr, "Error creating PMCH object\n"); goto clean_exit; } for (int i = 0; i < SRSLTE_MAX_TB; i++) { q->softbuffers[i] = srslte_vec_malloc(sizeof(srslte_softbuffer_rx_t)); if (!q->softbuffers[i]) { fprintf(stderr, "Error allocating soft buffer\n"); goto clean_exit; } if (srslte_softbuffer_rx_init(q->softbuffers[i], max_prb)) { fprintf(stderr, "Error initiating soft buffer\n"); goto clean_exit; } } if (srslte_cfo_init(&q->sfo_correct, max_prb*SRSLTE_NRE)) { fprintf(stderr, "Error initiating SFO correct\n"); goto clean_exit; } srslte_cfo_set_tol(&q->sfo_correct, 1e-5f/q->fft[0].symbol_sz); ret = SRSLTE_SUCCESS; } else { fprintf(stderr, "Invalid parametres\n"); } clean_exit: if (ret == SRSLTE_ERROR) { srslte_ue_dl_free(q); } return ret; }