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111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* libLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include <stdbool.h>
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#include <complex.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/modem/modem_table.h"
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#include "lte_tables.h"
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/** Internal functions */
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static int table_create(modem_table_t* q) {
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q->symbol_table = malloc(q->nsymbols*sizeof(cf_t));
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return q->symbol_table==NULL;
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}
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void modem_table_init(modem_table_t* q) {
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bzero((void*)q,sizeof(modem_table_t));
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}
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void modem_table_free(modem_table_t* q) {
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if (q->symbol_table) {
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free(q->symbol_table);
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}
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bzero(q, sizeof(modem_table_t));
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}
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void modem_table_reset(modem_table_t* q) {
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modem_table_free(q);
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modem_table_init(q);
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}
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int modem_table_set(modem_table_t* q, cf_t* table, soft_table_t *soft_table, uint32_t nsymbols, uint32_t nbits_x_symbol) {
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if (q->nsymbols) {
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return LIBLTE_ERROR;
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}
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q->nsymbols = nsymbols;
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if (table_create(q)) {
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return LIBLTE_ERROR;
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}
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memcpy(q->symbol_table,table,q->nsymbols*sizeof(cf_t));
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memcpy(&q->soft_table,soft_table,sizeof(soft_table_t));
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q->nbits_x_symbol = nbits_x_symbol;
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return LIBLTE_SUCCESS;
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}
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int modem_table_lte(modem_table_t* q, lte_mod_t modulation, bool compute_soft_demod) {
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switch(modulation) {
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case LTE_BPSK:
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q->nbits_x_symbol = 1;
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q->nsymbols = 2;
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if (table_create(q)) {
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return LIBLTE_ERROR;
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}
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set_BPSKtable(q->symbol_table, &q->soft_table, compute_soft_demod);
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break;
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case LTE_QPSK:
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q->nbits_x_symbol = 2;
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q->nsymbols = 4;
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if (table_create(q)) {
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return LIBLTE_ERROR;
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}
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set_QPSKtable(q->symbol_table, &q->soft_table, compute_soft_demod);
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break;
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case LTE_QAM16:
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q->nbits_x_symbol = 4;
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q->nsymbols = 16;
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if (table_create(q)) {
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return LIBLTE_ERROR;
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}
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set_16QAMtable(q->symbol_table, &q->soft_table, compute_soft_demod);
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break;
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case LTE_QAM64:
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q->nbits_x_symbol = 6;
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q->nsymbols = 64;
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if (table_create(q)) {
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return LIBLTE_ERROR;
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}
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set_64QAMtable(q->symbol_table, &q->soft_table, compute_soft_demod);
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break;
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}
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return LIBLTE_SUCCESS;
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}
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