int srslte_pdsch_set_cell(srslte_pdsch_t *q, srslte_cell_t cell)
{
int ret = SRSLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
srslte_cell_isvalid(&cell))
{
memcpy(&q->cell, &cell, sizeof(srslte_cell_t));
q->max_re = q->cell.nof_prb * MAX_PDSCH_RE(q->cell.cp);
INFO("PDSCH: Cell config PCI=%d, %d ports, %d PRBs, max_symbols: %d\n", q->cell.nof_ports,
q->cell.id, q->cell.nof_prb, q->max_re);
ret = SRSLTE_SUCCESS;
}
return ret;
}
/** Initializes the PDCCH transmitter and receiver */
int srslte_pdsch_init(srslte_pdsch_t *q, srslte_cell_t cell) {
int ret = SRSLTE_ERROR_INVALID_INPUTS;
int i;
if (q != NULL &&
srslte_cell_isvalid(&cell))
{
bzero(q, sizeof(srslte_pdsch_t));
ret = SRSLTE_ERROR;
q->cell = cell;
q->max_re = q->cell.nof_prb * MAX_PDSCH_RE(q->cell.cp);
INFO("Init PDSCH: %d ports %d PRBs, max_symbols: %d\n", q->cell.nof_ports,
q->cell.nof_prb, q->max_re);
if (srslte_precoding_init(&q->precoding, SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp))) {
fprintf(stderr, "Error initializing precoding\n");
goto clean;
}
for (i = 0; i < 4; i++) {
if (srslte_modem_table_lte(&q->mod[i], modulations[i])) {
goto clean;
}
srslte_modem_table_bytes(&q->mod[i]);
}
srslte_sch_init(&q->dl_sch);
q->rnti_is_set = false;
// Allocate int16_t for reception (LLRs)
q->e = srslte_vec_malloc(sizeof(int16_t) * q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM));
if (!q->e) {
goto clean;
}
q->d = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->d) {
goto clean;
}
for (i = 0; i < q->cell.nof_ports; i++) {
q->ce[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->ce[i]) {
goto clean;
}
q->x[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->x[i]) {
goto clean;
}
q->symbols[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->symbols[i]) {
goto clean;
}
}
ret = SRSLTE_SUCCESS;
}
clean:
if (ret == SRSLTE_ERROR) {
srslte_pdsch_free(q);
}
return ret;
}
/** Initializes the PDSCH transmitter and receiver */
static int pdsch_init(srslte_pdsch_t *q, uint32_t max_prb, bool is_ue, uint32_t nof_antennas)
{
int ret = SRSLTE_ERROR_INVALID_INPUTS;
if (q != NULL)
{
bzero(q, sizeof(srslte_pdsch_t));
ret = SRSLTE_ERROR;
q->max_re = max_prb * MAX_PDSCH_RE(q->cell.cp);
q->is_ue = is_ue;
q->nof_rx_antennas = nof_antennas;
INFO("Init PDSCH: %d PRBs, max_symbols: %d\n", max_prb, q->max_re);
for (int i = 0; i < 4; i++) {
if (srslte_modem_table_lte(&q->mod[i], modulations[i])) {
goto clean;
}
srslte_modem_table_bytes(&q->mod[i]);
}
if (srslte_sch_init(&q->dl_sch)) {
ERROR("Initiating DL SCH");
goto clean;
}
for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
// Allocate int16_t for reception (LLRs)
q->e[i] = srslte_vec_malloc(sizeof(int16_t) * q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM));
if (!q->e[i]) {
goto clean;
}
q->d[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->d[i]) {
goto clean;
}
}
for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
q->x[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->x[i]) {
goto clean;
}
q->symbols[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->symbols[i]) {
goto clean;
}
if (q->is_ue) {
for (int j = 0; j < SRSLTE_MAX_PORTS; j++) {
q->ce[i][j] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
if (!q->ce[i][j]) {
goto clean;
}
}
}
}
q->users = calloc(sizeof(srslte_pdsch_user_t*), q->is_ue?1:(1+SRSLTE_SIRNTI));
if (!q->users) {
perror("malloc");
goto clean;
}
if (srslte_sequence_init(&q->tmp_seq, q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM))) {
goto clean;
}
ret = SRSLTE_SUCCESS;
}
clean:
if (ret == SRSLTE_ERROR) {
srslte_pdsch_free(q);
}
return ret;
}
