int srslte_enb_dl_init(srslte_enb_dl_t *q, cf_t *out_buffer[SRSLTE_MAX_PORTS], uint32_t max_prb)
{
int ret = SRSLTE_ERROR_INVALID_INPUTS;
if (q != NULL)
{
ret = SRSLTE_ERROR;
bzero(q, sizeof(srslte_enb_dl_t));
for (int i=0;i<SRSLTE_MAX_PORTS;i++) {
q->sf_symbols[i] = srslte_vec_malloc(SRSLTE_SF_LEN_RE(max_prb, SRSLTE_CP_NORM) * sizeof(cf_t));
if (!q->sf_symbols[i]) {
perror("malloc");
goto clean_exit;
}
}
for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
if (srslte_ofdm_tx_init(&q->ifft[i], SRSLTE_CP_NORM, q->sf_symbols[i], out_buffer[i], max_prb)) {
ERROR("Error initiating FFT (%d)\n", i);
goto clean_exit;
}
}
if (srslte_ofdm_tx_init_mbsfn(&q->ifft_mbsfn, SRSLTE_CP_EXT, q->sf_symbols[0], out_buffer[0], max_prb)) {
ERROR("Error initiating FFT \n");
goto clean_exit;
}
if (srslte_pbch_init(&q->pbch)) {
ERROR("Error creating PBCH object\n");
goto clean_exit;
}
if (srslte_pcfich_init(&q->pcfich, 0)) {
ERROR("Error creating PCFICH object\n");
goto clean_exit;
}
if (srslte_phich_init(&q->phich, 0)) {
ERROR("Error creating PHICH object\n");
goto clean_exit;
}
int mbsfn_area_id = 1;
if (srslte_pmch_init(&q->pmch, max_prb, 1)) {
ERROR("Error creating PMCH object\n");
}
srslte_pmch_set_area_id(&q->pmch, mbsfn_area_id);
if (srslte_pdcch_init_enb(&q->pdcch, max_prb)) {
ERROR("Error creating PDCCH object\n");
goto clean_exit;
}
if (srslte_pdsch_init_enb(&q->pdsch, max_prb)) {
ERROR("Error creating PDSCH object\n");
goto clean_exit;
}
if (srslte_refsignal_cs_init(&q->csr_signal, max_prb)) {
ERROR("Error initializing CSR signal (%d)\n", ret);
goto clean_exit;
}
if (srslte_refsignal_mbsfn_init(&q->mbsfnr_signal, max_prb)) {
ERROR("Error initializing CSR signal (%d)\n", ret);
goto clean_exit;
}
ret = SRSLTE_SUCCESS;
} else {
ERROR("Invalid parameters\n");
}
clean_exit:
if (ret == SRSLTE_ERROR) {
srslte_enb_dl_free(q);
}
return 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->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 srslte_ue_dl_init(srslte_ue_dl_t *q,
srslte_cell_t cell)
{
int ret = SRSLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
srslte_cell_isvalid(&cell))
{
ret = SRSLTE_ERROR;
bzero(q, sizeof(srslte_ue_dl_t));
q->cell = cell;
q->pkt_errors = 0;
q->pkts_total = 0;
q->pending_ul_dci_rnti = 0;
q->sample_offset = 0;
if (srslte_ofdm_rx_init(&q->fft, q->cell.cp, q->cell.nof_prb)) {
fprintf(stderr, "Error initiating FFT\n");
goto clean_exit;
}
if (srslte_chest_dl_init(&q->chest, cell)) {
fprintf(stderr, "Error initiating channel estimator\n");
goto clean_exit;
}
if (srslte_regs_init(&q->regs, q->cell)) {
fprintf(stderr, "Error initiating REGs\n");
goto clean_exit;
}
if (srslte_pcfich_init(&q->pcfich, &q->regs, q->cell)) {
fprintf(stderr, "Error creating PCFICH object\n");
goto clean_exit;
}
if (srslte_phich_init(&q->phich, &q->regs, q->cell)) {
fprintf(stderr, "Error creating PHICH object\n");
goto clean_exit;
}
if (srslte_pdcch_init(&q->pdcch, &q->regs, q->cell)) {
fprintf(stderr, "Error creating PDCCH object\n");
goto clean_exit;
}
if (srslte_pdsch_init(&q->pdsch, q->cell)) {
fprintf(stderr, "Error creating PDSCH object\n");
goto clean_exit;
}
if (srslte_softbuffer_rx_init(&q->softbuffer, q->cell.nof_prb)) {
fprintf(stderr, "Error initiating soft buffer\n");
goto clean_exit;
}
if (srslte_cfo_init(&q->sfo_correct, q->cell.nof_prb*SRSLTE_NRE)) {
fprintf(stderr, "Error initiating SFO correct\n");
goto clean_exit;
}
srslte_cfo_set_tol(&q->sfo_correct, 1e-5/q->fft.symbol_sz);
q->sf_symbols = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
if (!q->sf_symbols) {
perror("malloc");
goto clean_exit;
}
for (uint32_t i=0;i<q->cell.nof_ports;i++) {
q->ce[i] = srslte_vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
if (!q->ce[i]) {
perror("malloc");
goto clean_exit;
}
}
ret = SRSLTE_SUCCESS;
} else {
fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
cell.id, cell.nof_ports, cell.nof_prb);
}
clean_exit:
if (ret == SRSLTE_ERROR) {
srslte_ue_dl_free(q);
}
return ret;
}
int main(int argc, char **argv) {
srslte_phich_t phich;
srslte_regs_t regs;
int i, j;
cf_t *ce[SRSLTE_MAX_PORTS];
int nof_re;
cf_t *slot_symbols[SRSLTE_MAX_PORTS];
uint8_t ack[50][SRSLTE_PHICH_NORM_NSEQUENCES], ack_rx;
uint32_t nsf;
float distance;
int cid, max_cid;
uint32_t ngroup, nseq, max_nseq;
parse_args(argc,argv);
max_nseq = SRSLTE_CP_ISNORM(cell.cp)?SRSLTE_PHICH_NORM_NSEQUENCES:SRSLTE_PHICH_EXT_NSEQUENCES;
nof_re = SRSLTE_CP_NORM_NSYMB * cell.nof_prb * SRSLTE_NRE;
/* init memory */
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
ce[i] = malloc(sizeof(cf_t) * nof_re);
if (!ce[i]) {
perror("malloc");
exit(-1);
}
for (j=0;j<nof_re;j++) {
ce[i][j] = 1;
}
slot_symbols[i] = malloc(sizeof(cf_t) * nof_re);
if (!slot_symbols[i]) {
perror("malloc");
exit(-1);
}
}
if (cell.id == 1000) {
cid = 0;
max_cid = 503;
} else {
cid = cell.id;
max_cid = cell.id;
}
while(cid <= max_cid) {
cell.id = cid;
printf("Testing CellID=%d...\n", cid);
if (srslte_regs_init(®s, cell)) {
fprintf(stderr, "Error initiating regs\n");
exit(-1);
}
if (srslte_phich_init(&phich, ®s, cell)) {
fprintf(stderr, "Error creating PBCH object\n");
exit(-1);
}
for (nsf=0;nsf<10;nsf++) {
srslte_phich_reset(&phich, slot_symbols);
/* Transmit all PHICH groups and sequence numbers */
for (ngroup=0;ngroup<srslte_phich_ngroups(&phich);ngroup++) {
for (nseq=0;nseq<max_nseq;nseq++) {
ack[ngroup][nseq] = rand()%2;
srslte_phich_encode(&phich, ack[ngroup][nseq], ngroup, nseq, nsf, slot_symbols);
}
}
/* combine outputs */
for (i=1;i<cell.nof_ports;i++) {
for (j=0;j<nof_re;j++) {
slot_symbols[0][j] += slot_symbols[i][j];
}
}
/* Receive all PHICH groups and sequence numbers */
for (ngroup=0;ngroup<srslte_phich_ngroups(&phich);ngroup++) {
for (nseq=0;nseq<max_nseq;nseq++) {
if (srslte_phich_decode(&phich, slot_symbols[0], ce, 0, ngroup, nseq, nsf, &ack_rx, &distance)<0) {
printf("Error decoding ACK\n");
exit(-1);
}
INFO("%d/%d, ack_tx: %d, ack_rx: %d, ns: %d, distance: %f\n",
ngroup, nseq, ack[ngroup][nseq], ack_rx, nsf, distance);
if (ack[ngroup][nseq] != ack_rx) {
printf("Invalid received ACK: %d!=%d\n", ack[ngroup][nseq], ack_rx);
exit(-1);
}
if (distance < 1.5) {
printf("Error\n");
exit(-1);
}
}
}
}
srslte_phich_free(&phich);
srslte_regs_free(®s);
cid++;
}
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
free(ce[i]);
free(slot_symbols[i]);
}
printf("OK\n");
exit(0);
}
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;
}
/* the gateway function */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int i;
srslte_cell_t cell;
srslte_phich_t phich;
srslte_chest_dl_t chest;
srslte_ofdm_t ofdm_rx;
srslte_regs_t regs;
uint32_t sf_idx;
cf_t *input_fft, *input_signal;
if (nrhs < NOF_INPUTS) {
help();
return;
}
if (mexutils_read_cell(ENBCFG, &cell)) {
help();
return;
}
if (mexutils_read_uint32_struct(ENBCFG, "NSubframe", &sf_idx)) {
help();
return;
}
if (srslte_chest_dl_init(&chest, cell)) {
mexErrMsgTxt("Error initializing equalizer\n");
return;
}
if (srslte_ofdm_rx_init(&ofdm_rx, cell.cp, cell.nof_prb)) {
mexErrMsgTxt("Error initializing FFT\n");
return;
}
if (srslte_regs_init(®s, cell)) {
mexErrMsgTxt("Error initiating regs\n");
return;
}
if (srslte_phich_init(&phich, ®s, cell)) {
mexErrMsgTxt("Error creating PHICH object\n");
return;
}
// Read input signal
input_signal = NULL;
int insignal_len = mexutils_read_cf(INPUT, &input_signal);
if (insignal_len < 0) {
mexErrMsgTxt("Error reading input signal\n");
return;
}
if (insignal_len == SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp)) {
input_fft = input_signal;
} else {
input_fft = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
srslte_ofdm_rx_sf(&ofdm_rx, input_signal, input_fft);
free(input_signal);
}
cf_t *ce[SRSLTE_MAX_PORTS];
for (i=0;i<cell.nof_ports;i++) {
ce[i] = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
}
if (nrhs > NOF_INPUTS) {
cf_t *cearray = NULL;
mexutils_read_cf(prhs[NOF_INPUTS], &cearray);
cf_t *cearray_ptr = cearray;
for (i=0;i<cell.nof_ports;i++) {
for (int j=0;j<SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp);j++) {
ce[i][j] = *cearray_ptr;
cearray_ptr++;
}
}
if (cearray) {
free(cearray);
}
} else {
srslte_chest_dl_estimate(&chest, input_fft, ce, sf_idx);
}
float noise_power;
if (nrhs > NOF_INPUTS + 1) {
noise_power = mxGetScalar(prhs[NOF_INPUTS+1]);
} else if (nrhs > NOF_INPUTS) {
noise_power = 0;
} else {
noise_power = srslte_chest_dl_get_noise_estimate(&chest);
}
// Read hires values
float *hires = NULL;
int nhires = mexutils_read_f(HIRES, &hires);
if (nhires != 2) {
mexErrMsgTxt("Expecting 2 values for hires parameter\n");
return;
}
uint32_t ngroup = (uint32_t) hires[0];
uint32_t nseq = (uint32_t) hires[1];
uint8_t ack;
float corr_res;
int n = srslte_phich_decode(&phich, input_fft, ce, noise_power, ngroup, nseq, sf_idx, &ack, &corr_res);
if (nlhs >= 1) {
if (n < 0) {
plhs[0] = mxCreateDoubleScalar(-1);
} else {
plhs[0] = mxCreateDoubleScalar(ack);
}
}
if (nlhs >= 2) {
mexutils_write_cf(phich.z, &plhs[1], 1, SRSLTE_PHICH_NBITS);
}
srslte_chest_dl_free(&chest);
srslte_ofdm_rx_free(&ofdm_rx);
srslte_phich_free(&phich);
srslte_regs_free(®s);
for (i=0;i<cell.nof_ports;i++) {
free(ce[i]);
}
free(input_fft);
return;
}
