156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* srsLTE 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 Affero General Public License for more details.
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*
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* A copy of the GNU Affero 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 <stdio.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 <unistd.h>
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#include <time.h>
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#include "srslte/srslte.h"
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srslte_cell_t cell = {
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6, // nof_prb
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1, // nof_ports
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1, // cell_id
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SRSLTE_CP_NORM, // cyclic prefix
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SRSLTE_PHICH_R_1, // PHICH resources
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SRSLTE_PHICH_NORM // PHICH length
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};
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void usage(char *prog) {
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printf("Usage: %s [cpv]\n", prog);
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printf("\t-c cell id [Default %d]\n", cell.id);
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printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
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printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
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printf("\t-v [set srslte_verbose to debug, default none]\n");
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}
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void parse_args(int argc, char **argv) {
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int opt;
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while ((opt = getopt(argc, argv, "cpnv")) != -1) {
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switch(opt) {
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case 'p':
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cell.nof_ports = atoi(argv[optind]);
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break;
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case 'n':
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cell.nof_prb = atoi(argv[optind]);
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break;
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case 'c':
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cell.id = atoi(argv[optind]);
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break;
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case 'v':
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srslte_verbose++;
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break;
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default:
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usage(argv[0]);
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exit(-1);
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}
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}
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}
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int main(int argc, char **argv) {
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srslte_pbch_t pbch;
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uint8_t bch_payload_tx[SRSLTE_BCH_PAYLOAD_LEN], bch_payload_rx[SRSLTE_BCH_PAYLOAD_LEN];
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int i, j;
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cf_t *ce[SRSLTE_MAX_PORTS];
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int nof_re;
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cf_t *slot1_symbols[SRSLTE_MAX_PORTS];
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uint32_t nof_rx_ports;
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parse_args(argc,argv);
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nof_re = SRSLTE_SLOT_LEN_RE(cell.nof_prb, SRSLTE_CP_NORM);
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/* init memory */
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for (i=0;i<cell.nof_ports;i++) {
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ce[i] = malloc(sizeof(cf_t) * nof_re);
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if (!ce[i]) {
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perror("malloc");
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exit(-1);
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}
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for (j=0;j<nof_re;j++) {
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ce[i][j] = 1;
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}
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slot1_symbols[i] = malloc(sizeof(cf_t) * nof_re);
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if (!slot1_symbols[i]) {
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perror("malloc");
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exit(-1);
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}
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}
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if (srslte_pbch_init(&pbch)) {
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fprintf(stderr, "Error creating PBCH object\n");
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exit(-1);
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}
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if (srslte_pbch_set_cell(&pbch, cell)) {
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fprintf(stderr, "Error creating PBCH object\n");
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exit(-1);
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}
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srand(time(NULL));
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for (i=0;i<SRSLTE_BCH_PAYLOAD_LEN;i++) {
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bch_payload_tx[i] = rand()%2;
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}
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srslte_pbch_encode(&pbch, bch_payload_tx, slot1_symbols, 0);
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/* combine outputs */
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for (i=1;i<cell.nof_ports;i++) {
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for (j=0;j<nof_re;j++) {
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slot1_symbols[0][j] += slot1_symbols[i][j];
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}
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}
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srslte_pbch_decode_reset(&pbch);
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if (1 != srslte_pbch_decode(&pbch, slot1_symbols[0], ce, 0, bch_payload_rx, &nof_rx_ports, NULL)) {
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printf("Error decoding\n");
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exit(-1);
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}
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srslte_pbch_free(&pbch);
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for (i=0;i<cell.nof_ports;i++) {
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free(ce[i]);
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free(slot1_symbols[i]);
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}
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printf("Tx ports: %d - Rx ports: %d\n", cell.nof_ports, nof_rx_ports);
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printf("Tx payload: ");
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srslte_vec_fprint_hex(stdout, bch_payload_tx, SRSLTE_BCH_PAYLOAD_LEN);
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printf("Rx payload: ");
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srslte_vec_fprint_hex(stdout, bch_payload_rx, SRSLTE_BCH_PAYLOAD_LEN);
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if (nof_rx_ports == cell.nof_ports && !memcmp(bch_payload_rx, bch_payload_tx, sizeof(uint8_t) * SRSLTE_BCH_PAYLOAD_LEN)) {
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printf("OK\n");
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exit(0);
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} else {
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printf("Error\n");
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exit(-1);
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}
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}
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