void srslte_ue_dl_free(srslte_ue_dl_t *q) {
if (q) {
for (int port = 0; port < SRSLTE_MAX_PORTS; port++) {
srslte_ofdm_rx_free(&q->fft[port]);
}
srslte_ofdm_rx_free(&q->fft_mbsfn);
srslte_chest_dl_free(&q->chest);
srslte_regs_free(&q->regs);
srslte_pcfich_free(&q->pcfich);
srslte_phich_free(&q->phich);
srslte_pdcch_free(&q->pdcch);
srslte_pdsch_free(&q->pdsch);
srslte_pmch_free(&q->pmch);
srslte_cfo_free(&q->sfo_correct);
for (int i = 0; i < SRSLTE_MAX_TB; i++) {
srslte_softbuffer_rx_free(q->softbuffers[i]);
if (q->softbuffers[i]) {
free(q->softbuffers[i]);
}
}
for (int j = 0; j < SRSLTE_MAX_PORTS; j++) {
if (q->sf_symbols_m[j]) {
free(q->sf_symbols_m[j]);
}
for (uint32_t i=0;i<SRSLTE_MAX_PORTS;i++) {
if (q->ce_m[i][j]) {
free(q->ce_m[i][j]);
}
}
}
bzero(q, sizeof(srslte_ue_dl_t));
}
}
void srslte_ue_dl_free(srslte_ue_dl_t* q)
{
if (q) {
for (int port = 0; port < SRSLTE_MAX_PORTS; port++) {
srslte_ofdm_rx_free(&q->fft[port]);
}
srslte_ofdm_rx_free(&q->fft_mbsfn);
srslte_chest_dl_free(&q->chest);
srslte_chest_dl_res_free(&q->chest_res);
for (int i = 0; i < MI_NOF_REGS; i++) {
srslte_regs_free(&q->regs[i]);
}
srslte_pcfich_free(&q->pcfich);
srslte_phich_free(&q->phich);
srslte_pdcch_free(&q->pdcch);
srslte_pdsch_free(&q->pdsch);
srslte_pmch_free(&q->pmch);
for (int j = 0; j < SRSLTE_MAX_PORTS; j++) {
if (q->sf_symbols[j]) {
free(q->sf_symbols[j]);
}
}
bzero(q, sizeof(srslte_ue_dl_t));
}
}
void base_free() {
int i;
srslte_filesource_free(&fsrc);
free(input_buffer);
free(fft_buffer);
srslte_filesource_free(&fsrc);
for (i=0;i<cell.nof_ports;i++) {
free(ce[i]);
}
srslte_chest_dl_free(&chest);
srslte_ofdm_rx_free(&fft);
srslte_pbch_free(&pbch);
}
void srslte_ue_mib_free(srslte_ue_mib_t * q)
{
if (q->sf_symbols) {
free(q->sf_symbols);
}
for (int i=0;i<SRSLTE_MAX_PORTS;i++) {
if (q->ce[i]) {
free(q->ce[i]);
}
}
srslte_sync_free(&q->sfind);
srslte_chest_dl_free(&q->chest);
srslte_pbch_free(&q->pbch);
srslte_ofdm_rx_free(&q->fft);
bzero(q, sizeof(srslte_ue_mib_t));
}
void base_free() {
int i;
srslte_filesource_free(&fsrc);
free(input_buffer);
free(fft_buffer);
srslte_filesource_free(&fsrc);
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
free(ce[i]);
}
srslte_chest_dl_free(&chest);
srslte_ofdm_rx_free(&fft);
srslte_pdcch_free(&pdcch);
srslte_regs_free(®s);
}
void srslte_ue_dl_free(srslte_ue_dl_t *q) {
if (q) {
srslte_ofdm_rx_free(&q->fft);
srslte_chest_dl_free(&q->chest);
srslte_regs_free(&q->regs);
srslte_pcfich_free(&q->pcfich);
srslte_phich_free(&q->phich);
srslte_pdcch_free(&q->pdcch);
srslte_pdsch_free(&q->pdsch);
srslte_softbuffer_rx_free(&q->softbuffer);
if (q->sf_symbols) {
free(q->sf_symbols);
}
for (uint32_t i=0;i<q->cell.nof_ports;i++) {
if (q->ce[i]) {
free(q->ce[i]);
}
}
bzero(q, sizeof(srslte_ue_dl_t));
}
}
/* the gateway function */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int i;
srslte_cell_t cell;
srslte_ofdm_t ofdm_rx;
srslte_pdsch_t pdsch;
srslte_chest_dl_t chest;
cf_t *input_fft;
srslte_pdsch_cfg_t cfg;
srslte_softbuffer_rx_t softbuffer;
uint32_t rnti32;
uint32_t cfi;
if (nrhs < NOF_INPUTS) {
help();
return;
}
srslte_verbose = SRSLTE_VERBOSE_DEBUG;
bzero(&cfg, sizeof(srslte_pdsch_cfg_t));
if (mexutils_read_cell(ENBCFG, &cell)) {
help();
return;
}
if (mexutils_read_uint32_struct(PDSCHCFG, "RNTI", &rnti32)) {
mexErrMsgTxt("Field RNTI not found in pdsch config\n");
return;
}
if (mexutils_read_uint32_struct(ENBCFG, "CFI", &cfi)) {
help();
return;
}
if (mexutils_read_uint32_struct(ENBCFG, "NSubframe", &cfg.sf_idx)) {
help();
return;
}
if (srslte_ofdm_rx_init(&ofdm_rx, cell.cp, cell.nof_prb)) {
fprintf(stderr, "Error initializing FFT\n");
return;
}
if (srslte_pdsch_init(&pdsch, cell)) {
mexErrMsgTxt("Error initiating PDSCH\n");
return;
}
srslte_pdsch_set_rnti(&pdsch, (uint16_t) (rnti32 & 0xffff));
if (srslte_softbuffer_rx_init(&softbuffer, cell.nof_prb)) {
mexErrMsgTxt("Error initiating soft buffer\n");
return;
}
if (srslte_chest_dl_init(&chest, cell)) {
mexErrMsgTxt("Error initializing equalizer\n");
return;
}
srslte_ra_dl_grant_t grant;
grant.mcs.tbs = mxGetScalar(TBS);
if (grant.mcs.tbs == 0) {
mexErrMsgTxt("Error trblklen is zero\n");
return;
}
if (srslte_cbsegm(&cfg.cb_segm, grant.mcs.tbs)) {
mexErrMsgTxt("Error computing CB segmentation\n");
return;
}
if (mexutils_read_uint32_struct(PDSCHCFG, "RV", &cfg.rv)) {
mexErrMsgTxt("Field RV not found in pdsch config\n");
return;
}
uint32_t max_iterations = 5;
mexutils_read_uint32_struct(PDSCHCFG, "NTurboDecIts", &max_iterations);
char *mod_str = mexutils_get_char_struct(PDSCHCFG, "Modulation");
if (!strcmp(mod_str, "QPSK")) {
grant.mcs.mod = SRSLTE_MOD_QPSK;
} else if (!strcmp(mod_str, "16QAM")) {
grant.mcs.mod = SRSLTE_MOD_16QAM;
} else if (!strcmp(mod_str, "64QAM")) {
grant.mcs.mod = SRSLTE_MOD_64QAM;
} else {
mexErrMsgTxt("Unknown modulation\n");
return;
}
mxFree(mod_str);
mxArray *p;
p = mxGetField(PDSCHCFG, 0, "PRBSet");
if (!p) {
mexErrMsgTxt("Error field PRBSet not found\n");
return;
}
float *prbset_f;
uint64_t *prbset;
if (mxGetClassID(p) == mxDOUBLE_CLASS) {
grant.nof_prb = mexutils_read_f(p, &prbset_f);
prbset = malloc(sizeof(uint64_t)*grant.nof_prb);
for (i=0;i<grant.nof_prb;i++) {
prbset[i] = (uint64_t) prbset_f[i];
}
} else {
grant.nof_prb = mexutils_read_uint64(p, &prbset);
}
for (i=0;i<cell.nof_prb;i++) {
grant.prb_idx[0][i] = false;
for (int j=0;j<grant.nof_prb && !grant.prb_idx[0][i];j++) {
if ((int) prbset[j] == i) {
grant.prb_idx[0][i] = true;
}
}
grant.prb_idx[1][i] = grant.prb_idx[0][i];
}
free(prbset);
/* Configure rest of pdsch_cfg parameters */
grant.Qm = srslte_mod_bits_x_symbol(grant.mcs.mod);
if (srslte_pdsch_cfg(&cfg, cell, &grant, cfi, cfg.sf_idx, cfg.rv)) {
fprintf(stderr, "Error configuring PDSCH\n");
exit(-1);
}
/** Allocate input buffers */
int nof_retx=1;
if (mexutils_isCell(INPUT)) {
nof_retx = mexutils_getLength(INPUT);
}
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));
}
uint8_t *data_bytes = srslte_vec_malloc(sizeof(uint8_t) * grant.mcs.tbs/8);
if (!data_bytes) {
return;
}
srslte_sch_set_max_noi(&pdsch.dl_sch, max_iterations);
input_fft = NULL;
int r=-1;
for (int rvIdx=0;rvIdx<nof_retx && r != 0;rvIdx++) {
mxArray *tmp = (mxArray*) INPUT;
if (mexutils_isCell(INPUT)) {
tmp = mexutils_getCellArray(INPUT, rvIdx);
if (nof_retx > 1) {
cfg.rv = rv_seq[rvIdx%4];
}
}
// Read input signal
cf_t *input_signal = NULL;
int insignal_len = mexutils_read_cf(tmp, &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);
}
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, cfg.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);
}
r = srslte_pdsch_decode(&pdsch, &cfg, &softbuffer, input_fft, ce, noise_power, data_bytes);
}
uint8_t *data = malloc(grant.mcs.tbs);
srslte_bit_unpack_vector(data_bytes, data, grant.mcs.tbs);
if (nlhs >= 1) {
plhs[0] = mxCreateLogicalScalar(r == 0);
}
if (nlhs >= 2) {
mexutils_write_uint8(data, &plhs[1], grant.mcs.tbs, 1);
}
if (nlhs >= 3) {
mexutils_write_cf(pdsch.symbols[0], &plhs[2], cfg.nbits.nof_re, 1);
}
if (nlhs >= 4) {
mexutils_write_cf(pdsch.d, &plhs[3], cfg.nbits.nof_re, 1);
}
if (nlhs >= 5) {
mexutils_write_s(pdsch.e, &plhs[4], cfg.nbits.nof_bits, 1);
}
srslte_softbuffer_rx_free(&softbuffer);
srslte_chest_dl_free(&chest);
srslte_pdsch_free(&pdsch);
srslte_ofdm_rx_free(&ofdm_rx);
for (i=0;i<cell.nof_ports;i++) {
free(ce[i]);
}
free(data_bytes);
free(data);
if (input_fft) {
free(input_fft);
}
return;
}
/* the gateway function */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int i;
srslte_cell_t cell;
srslte_chest_dl_t chest;
srslte_precoding_t cheq;
cf_t *input_signal = NULL, *output_signal[SRSLTE_MAX_LAYERS];
cf_t *output_signal2 = NULL;
cf_t *ce[SRSLTE_MAX_PORTS];
double *outr0=NULL, *outi0=NULL;
double *outr1=NULL, *outi1=NULL;
double *outr2=NULL, *outi2=NULL;
if (!mxIsDouble(CELLID) && mxGetN(CELLID) != 1 &&
!mxIsDouble(PORTS) && mxGetN(PORTS) != 1 &&
mxGetM(CELLID) != 1) {
help();
return;
}
cell.id = (uint32_t) *((double*) mxGetPr(CELLID));
cell.nof_prb = mxGetM(INPUT)/SRSLTE_NRE;
cell.nof_ports = (uint32_t) *((double*) mxGetPr(PORTS));
if ((mxGetN(INPUT)%14) == 0) {
cell.cp = SRSLTE_CP_NORM;
} else if ((mxGetN(INPUT)%12)!=0) {
cell.cp = SRSLTE_CP_EXT;
} else {
mexErrMsgTxt("Invalid number of symbols\n");
help();
return;
}
if (srslte_chest_dl_init(&chest, cell)) {
mexErrMsgTxt("Error initiating channel estimator\n");
return;
}
int nsubframes;
if (cell.cp == SRSLTE_CP_NORM) {
nsubframes = mxGetN(INPUT)/14;
} else {
nsubframes = mxGetN(INPUT)/12;
}
uint32_t sf_idx=0;
if (nsubframes == 1) {
if (nrhs != NOF_INPUTS+1) {
mexErrMsgTxt("Received 1 subframe. Need to provide subframe index.\n");
help();
return;
}
sf_idx = (uint32_t) *((double*) mxGetPr(SFIDX));
}
if (nrhs > 5) {
uint32_t filter_len = 0;
float *filter;
double *f;
filter_len = mxGetNumberOfElements(FREQ_FILTER);
filter = malloc(sizeof(float) * filter_len);
f = (double*) mxGetPr(FREQ_FILTER);
for (i=0;i<filter_len;i++) {
filter[i] = (float) f[i];
}
srslte_chest_dl_set_filter_freq(&chest, filter, filter_len);
filter_len = mxGetNumberOfElements(TIME_FILTER);
filter = malloc(sizeof(float) * filter_len);
f = (double*) mxGetPr(TIME_FILTER);
for (i=0;i<filter_len;i++) {
filter[i] = (float) f[i];
}
srslte_chest_dl_set_filter_time(&chest, filter, filter_len);
}
double *inr=(double *)mxGetPr(INPUT);
double *ini=(double *)mxGetPi(INPUT);
/** Allocate input buffers */
int nof_re = 2*SRSLTE_CP_NSYMB(cell.cp)*cell.nof_prb*SRSLTE_NRE;
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
ce[i] = srslte_vec_malloc(nof_re * sizeof(cf_t));
}
input_signal = srslte_vec_malloc(nof_re * sizeof(cf_t));
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
output_signal[i] = srslte_vec_malloc(nof_re * sizeof(cf_t));
}
output_signal2 = srslte_vec_malloc(nof_re * sizeof(cf_t));
srslte_precoding_init(&cheq, nof_re);
/* Create output values */
if (nlhs >= 1) {
plhs[0] = mxCreateDoubleMatrix(nof_re * nsubframes, cell.nof_ports, mxCOMPLEX);
outr0 = mxGetPr(plhs[0]);
outi0 = mxGetPi(plhs[0]);
}
if (nlhs >= 2) {
plhs[1] = mxCreateDoubleMatrix(SRSLTE_REFSIGNAL_MAX_NUM_SF(cell.nof_prb)*nsubframes, cell.nof_ports, mxCOMPLEX);
outr1 = mxGetPr(plhs[1]);
outi1 = mxGetPi(plhs[1]);
}
if (nlhs >= 3) {
plhs[2] = mxCreateDoubleMatrix(nof_re * nsubframes, 1, mxCOMPLEX);
outr2 = mxGetPr(plhs[2]);
outi2 = mxGetPi(plhs[2]);
}
for (int sf=0;sf<nsubframes;sf++) {
/* Convert input to C complex type */
for (i=0;i<nof_re;i++) {
__real__ input_signal[i] = (float) *inr;
if (ini) {
__imag__ input_signal[i] = (float) *ini;
}
inr++;
ini++;
}
if (nsubframes != 1) {
sf_idx = sf%10;
}
if (srslte_chest_dl_estimate(&chest, input_signal, ce, sf_idx)) {
mexErrMsgTxt("Error running channel estimator\n");
return;
}
if (cell.nof_ports == 1) {
srslte_predecoding_single(input_signal, ce[0], output_signal2, nof_re, srslte_chest_dl_get_noise_estimate(&chest));
} else {
srslte_predecoding_diversity(&cheq, input_signal, ce, output_signal, cell.nof_ports, nof_re, srslte_chest_dl_get_noise_estimate(&chest));
srslte_layerdemap_diversity(output_signal, output_signal2, cell.nof_ports, nof_re/cell.nof_ports);
}
if (nlhs >= 1) {
for (int j=0;j<cell.nof_ports;j++) {
for (i=0;i<nof_re;i++) {
*outr0 = (double) crealf(ce[j][i]);
if (outi0) {
*outi0 = (double) cimagf(ce[j][i]);
}
outr0++;
outi0++;
}
}
}
if (nlhs >= 2) {
for (int j=0;j<cell.nof_ports;j++) {
for (i=0;i<SRSLTE_REFSIGNAL_NUM_SF(cell.nof_prb,j);i++) {
*outr1 = (double) crealf(chest.pilot_estimates_average[j][i]);
if (outi1) {
*outi1 = (double) cimagf(chest.pilot_estimates_average[j][i]);
}
outr1++;
outi1++;
}
}
}
if (nlhs >= 3) {
for (i=0;i<nof_re;i++) {
*outr2 = (double) crealf(output_signal2[i]);
if (outi2) {
*outi2 = (double) cimagf(output_signal2[i]);
}
outr2++;
outi2++;
}
}
}
if (nlhs >= 4) {
plhs[3] = mxCreateDoubleScalar(srslte_chest_dl_get_noise_estimate(&chest));
}
if (nlhs >= 5) {
plhs[4] = mxCreateDoubleScalar(srslte_chest_dl_get_rsrp(&chest));
}
srslte_chest_dl_free(&chest);
srslte_precoding_free(&cheq);
return;
}
/* the gateway function */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int i;
srslte_cell_t cell;
srslte_pdsch_t pdsch;
srslte_chest_dl_t chest;
srslte_ofdm_t fft;
cf_t *input_fft, *input_signal;
int nof_re;
srslte_pdsch_cfg_t cfg;
srslte_softbuffer_rx_t softbuffer;
uint32_t rnti32;
uint32_t cfi;
if (nrhs < NOF_INPUTS) {
help();
return;
}
bzero(&cfg, sizeof(srslte_pdsch_cfg_t));
if (mexutils_read_cell(ENBCFG, &cell)) {
help();
return;
}
if (mexutils_read_uint32_struct(PDSCHCFG, "RNTI", &rnti32)) {
mexErrMsgTxt("Field RNTI not found in pdsch config\n");
return;
}
if (mexutils_read_uint32_struct(ENBCFG, "CFI", &cfi)) {
help();
return;
}
if (mexutils_read_uint32_struct(ENBCFG, "NSubframe", &cfg.sf_idx)) {
help();
return;
}
if (srslte_pdsch_init(&pdsch, cell)) {
mexErrMsgTxt("Error initiating PDSCH\n");
return;
}
srslte_pdsch_set_rnti(&pdsch, (uint16_t) (rnti32 & 0xffff));
if (srslte_softbuffer_rx_init(&softbuffer, cell)) {
mexErrMsgTxt("Error initiating soft buffer\n");
return;
}
if (srslte_chest_dl_init(&chest, cell)) {
mexErrMsgTxt("Error initializing equalizer\n");
return;
}
if (srslte_ofdm_rx_init(&fft, cell.cp, cell.nof_prb)) {
mexErrMsgTxt("Error initializing FFT\n");
return;
}
nof_re = 2 * SRSLTE_CP_NORM_NSYMB * cell.nof_prb * SRSLTE_NRE;
cfg.grant.mcs.tbs = mxGetScalar(TBS);
if (cfg.grant.mcs.tbs == 0) {
mexErrMsgTxt("Error trblklen is zero\n");
return;
}
if (srslte_cbsegm(&cfg.cb_segm, cfg.grant.mcs.tbs)) {
mexErrMsgTxt("Error computing CB segmentation\n");
return;
}
if (mexutils_read_uint32_struct(PDSCHCFG, "RV", &cfg.rv)) {
mexErrMsgTxt("Field RV not found in pdsch config\n");
return;
}
char *mod_str = mexutils_get_char_struct(PDSCHCFG, "Modulation");
if (!strcmp(mod_str, "QPSK")) {
cfg.grant.mcs.mod = SRSLTE_MOD_QPSK;
} else if (!strcmp(mod_str, "16QAM")) {
cfg.grant.mcs.mod = SRSLTE_MOD_16QAM;
} else if (!strcmp(mod_str, "64QAM")) {
cfg.grant.mcs.mod = SRSLTE_MOD_64QAM;
} else {
mexErrMsgTxt("Unknown modulation\n");
return;
}
mxFree(mod_str);
float *prbset;
mxArray *p;
p = mxGetField(PDSCHCFG, 0, "PRBSet");
if (!p) {
mexErrMsgTxt("Error field PRBSet not found\n");
return;
}
// Only localized PRB supported
cfg.grant.nof_prb = mexutils_read_f(p, &prbset);
for (i=0;i<cell.nof_prb;i++) {
cfg.grant.prb_idx[0][i] = false;
for (int j=0;j<cfg.grant.nof_prb && !cfg.grant.prb_idx[0][i];j++) {
if ((int) prbset[j] == i) {
cfg.grant.prb_idx[0][i] = true;
}
}
}
memcpy(&cfg.grant.prb_idx[1], &cfg.grant.prb_idx[0], SRSLTE_MAX_PRB*sizeof(bool));
free(prbset);
srslte_dl_dci_to_grant_nof_re(&cfg.grant, cell, cfg.sf_idx, cell.nof_prb<10?(cfi+1):cfi);
// Fill rest of grant structure
cfg.grant.lstart = cell.nof_prb<10?(cfi+1):cfi;
cfg.grant.nof_symb = 2*SRSLTE_CP_NSYMB(cell.cp)-cfg.grant.lstart;
cfg.grant.Qm = srslte_mod_bits_x_symbol(cfg.grant.mcs.mod);
cfg.grant.nof_bits = cfg.grant.nof_re * cfg.grant.Qm;
/** Allocate input buffers */
if (mexutils_read_cf(INPUT, &input_signal) < 0) {
mexErrMsgTxt("Error reading input signal\n");
return;
}
input_fft = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
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));
}
srslte_ofdm_rx_sf(&fft, input_signal, input_fft);
if (nrhs > NOF_INPUTS) {
cf_t *cearray = NULL;
nof_re = 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<nof_re/cell.nof_ports;j++) {
ce[i][j] = *cearray;
cearray++;
}
}
if (cearray_ptr)
free(cearray_ptr);
} else {
srslte_chest_dl_estimate(&chest, input_fft, ce, cfg.sf_idx);
}
float noise_power;
if (nrhs > NOF_INPUTS + 1) {
noise_power = mxGetScalar(prhs[NOF_INPUTS+1]);
} else {
noise_power = srslte_chest_dl_get_noise_estimate(&chest);
}
uint8_t *data = malloc(sizeof(uint8_t) * cfg.grant.mcs.tbs);
if (!data) {
return;
}
int r = srslte_pdsch_decode(&pdsch, &cfg, &softbuffer, input_fft, ce, noise_power, data);
if (nlhs >= 1) {
plhs[0] = mxCreateLogicalScalar(r == 0);
}
if (nlhs >= 2) {
mexutils_write_uint8(data, &plhs[1], cfg.grant.mcs.tbs, 1);
}
if (nlhs >= 3) {
mexutils_write_cf(pdsch.symbols[0], &plhs[2], cfg.grant.nof_re, 1);
}
if (nlhs >= 4) {
mexutils_write_cf(pdsch.d, &plhs[3], cfg.grant.nof_re, 1);
}
if (nlhs >= 5) {
mexutils_write_f(pdsch.e, &plhs[4], cfg.grant.nof_bits, 1);
}
srslte_chest_dl_free(&chest);
srslte_ofdm_rx_free(&fft);
srslte_pdsch_free(&pdsch);
for (i=0;i<cell.nof_ports;i++) {
free(ce[i]);
}
free(data);
free(input_signal);
free(input_fft);
return;
}
/* 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;
}
/* the gateway function */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int i;
srslte_cell_t cell;
srslte_pcfich_t pcfich;
srslte_chest_dl_t chest;
srslte_ofdm_t fft;
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(&fft, 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_pcfich_init(&pcfich, ®s, cell)) {
mexErrMsgTxt("Error creating PBCH object\n");
return;
}
/** Allocate input buffers */
if (mexutils_read_cf(INPUT, &input_signal) < 0) {
mexErrMsgTxt("Error reading input signal\n");
return;
}
input_fft = srslte_vec_malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
// Set Channel estimates to 1.0 (ignore fading)
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));
}
srslte_ofdm_rx_sf(&fft, input_signal, input_fft);
if (nrhs > NOF_INPUTS) {
cf_t *cearray;
mexutils_read_cf(prhs[NOF_INPUTS], &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;
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 {
noise_power = srslte_chest_dl_get_noise_estimate(&chest);
}
uint32_t cfi;
float corr_res;
int n = srslte_pcfich_decode(&pcfich, input_fft, ce, noise_power, sf_idx, &cfi, &corr_res);
if (nlhs >= 1) {
if (n < 0) {
plhs[0] = mxCreateDoubleScalar(-1);
} else {
plhs[0] = mxCreateDoubleScalar(cfi);
}
}
if (nlhs >= 2) {
mexutils_write_cf(pcfich.d, &plhs[1], 16, 1);
}
if (nlhs >= 3) {
mexutils_write_cf(pcfich.symbols[0], &plhs[2], 16, 1);
}
srslte_chest_dl_free(&chest);
srslte_ofdm_rx_free(&fft);
srslte_pcfich_free(&pcfich);
srslte_regs_free(®s);
for (i=0;i<cell.nof_ports;i++) {
free(ce[i]);
}
free(input_signal);
free(input_fft);
return;
}