mirror of https://github.com/PentHertz/srsLTE.git
243 lines
6.3 KiB
C
243 lines
6.3 KiB
C
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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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 <time.h>
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#include <unistd.h>
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#include "srslte/phy/phch/npbch.h"
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#include "srslte/phy/utils/debug.h"
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#include "srslte/phy/utils/vector.h"
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#define HAVE_OFDM 0
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#define HAVE_MIB_NB 1
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srslte_nbiot_cell_t cell = {};
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void usage(char* prog)
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{
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printf("Usage: %s [cpv]\n", prog);
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printf("\t-c cell id [Default %d]\n", cell.base.id);
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printf("\t-p cell.nof_ports [Default %d]\n", cell.base.nof_ports);
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printf("\t-n cell.nof_prb [Default %d]\n", cell.base.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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{
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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.base.nof_ports = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 'n':
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cell.base.nof_prb = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 'c':
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cell.base.id = (uint32_t)strtol(argv[optind], NULL, 10);
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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 re_extract_test()
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{
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int ret = SRSLTE_ERROR;
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srslte_nbiot_cell_t cell2 = {};
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cell2.base.id = 257;
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cell2.base.nof_ports = 1;
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cell2.n_id_ncell = 257;
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cell2.nof_ports = 1;
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cell2.base.nof_prb = 1;
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if (!srslte_nbiot_cell_isvalid(&cell2)) {
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printf("cell is not properly configured\n");
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return ret;
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}
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cf_t sf_syms[168];
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for (int i = 0; i < 168; i++) {
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sf_syms[i] = i + 1;
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}
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cf_t npbch_syms[100];
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int nof_ext_syms = srslte_npbch_cp(sf_syms, npbch_syms, cell2, false);
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if (SRSLTE_VERBOSE_ISINFO()) {
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for (int i = 0; i < nof_ext_syms; i++) {
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printf("re%d:", i);
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srslte_vec_fprint_c(stdout, &npbch_syms[i], 1);
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}
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}
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if (nof_ext_syms == 100) {
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ret = SRSLTE_SUCCESS;
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printf("RE extraction ok!\n");
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}
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return ret;
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}
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int main(int argc, char** argv)
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{
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int ret = SRSLTE_ERROR;
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srslte_npbch_t npbch;
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uint8_t bch_payload_tx[SRSLTE_MIB_NB_LEN], bch_payload_rx[SRSLTE_MIB_NB_LEN];
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cf_t* ce[SRSLTE_MAX_PORTS];
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int nof_re;
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cf_t* sf_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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if (re_extract_test() != SRSLTE_SUCCESS) {
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return ret;
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}
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// set essential cell params
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cell.base.nof_prb = 1;
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cell.nof_ports = 1;
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nof_re = SRSLTE_SF_LEN_RE(cell.base.nof_prb, SRSLTE_CP_NORM);
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/* init memory */
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for (int 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 (int j = 0; j < nof_re; j++) {
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ce[i][j] = 1;
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}
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sf_symbols[i] = malloc(sizeof(cf_t) * nof_re);
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if (!sf_symbols[i]) {
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perror("malloc");
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exit(-1);
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}
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memset(sf_symbols[i], 0, sizeof(cf_t) * nof_re);
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}
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if (srslte_npbch_init(&npbch)) {
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fprintf(stderr, "Error creating NPBCH object\n");
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exit(-1);
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}
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if (srslte_npbch_set_cell(&npbch, cell)) {
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fprintf(stderr, "Error setting cell in NPBCH object\n");
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exit(-1);
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}
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#if HAVE_MIB_NB
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srslte_mib_nb_t mib_nb = {};
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mib_nb.sched_info_sib1 = 3; // according to Table 16.4.1.3-3 in 36.213 that means 4 NPDSCH repetitions
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mib_nb.sys_info_tag = 1;
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mib_nb.ac_barring = false;
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mib_nb.mode = SRSLTE_NBIOT_MODE_STANDALONE;
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uint32_t hfn = 82;
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uint32_t sfn = 0;
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srslte_npbch_mib_pack(hfn, sfn, mib_nb, bch_payload_tx);
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#else
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// srand(0);
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srand(time(NULL));
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for (i = 0; i < SRSLTE_MIB_NB_LEN; i++) {
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bch_payload_tx[i] = rand() % 2;
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}
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#endif
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if (srslte_npbch_put_subframe(&npbch, bch_payload_tx, sf_symbols, 0)) {
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fprintf(stderr, "Error encoding NPBCH\n");
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exit(-1);
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}
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#if 0
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/* combine outputs */
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for (i=1;i<cell.base.nof_ports;i++) {
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for (j=0;j<nof_re;j++) {
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sf_symbols[0][j] += sf_symbols[i][j];
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}
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}
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#endif
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#if HAVE_OFDM
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cf_t td_signal[nof_re * 2];
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srslte_ofdm_t ofdm_tx;
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srslte_ofdm_t ofdm_rx;
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if (srslte_ofdm_tx_init(&ofdm_tx, SRSLTE_CP_NORM, cell.base.nof_prb)) {
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fprintf(stderr, "Error creating iFFT object\n");
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exit(-1);
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}
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// srslte_ofdm_set_normalize(&ofdm_tx, true);
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if (srslte_ofdm_rx_init(&ofdm_rx, SRSLTE_CP_NORM, cell.base.nof_prb)) {
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fprintf(stderr, "Error initializing FFT\n");
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return -1;
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}
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// transfer into time doamin and back
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srslte_ofdm_tx_sf(&ofdm_tx, sf_symbols[0], td_signal);
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srslte_ofdm_rx_sf(&ofdm_rx, td_signal, sf_symbols[0]);
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srslte_ofdm_tx_free(&ofdm_tx);
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srslte_ofdm_rx_free(&ofdm_rx);
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#endif
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srslte_npbch_decode_reset(&npbch);
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if (srslte_npbch_decode(&npbch, sf_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_npbch_free(&npbch);
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for (int i = 0; i < cell.nof_ports; i++) {
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free(ce[i]);
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free(sf_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_MIB_NB_LEN);
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printf("Rx payload: ");
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srslte_vec_fprint_hex(stdout, bch_payload_rx, SRSLTE_MIB_NB_LEN);
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#if HAVE_MIB_NB
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srslte_mib_nb_t mib_nb_rx;
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srslte_npbch_mib_unpack(bch_payload_rx, &mib_nb_rx);
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srslte_mib_nb_printf(stdout, cell, &mib_nb_rx);
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#endif
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if (nof_rx_ports == cell.nof_ports && !memcmp(bch_payload_rx, bch_payload_tx, sizeof(uint8_t) * SRSLTE_MIB_NB_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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