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128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 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 <unistd.h>
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#include <math.h>
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#include <time.h>
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#include <sys/time.h>
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#include <complex.h>
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#include "srslte/srslte.h"
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#define MAX_LEN 70176
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uint32_t N_ifft_ul = 1536;
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uint32_t config_idx = 3;
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uint32_t root_seq_idx = 0;
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uint32_t zero_corr_zone = 15;
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void usage(char *prog) {
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printf("Usage: %s\n", prog);
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printf("\t-N Uplink IFFT size [Default %d]\n", N_ifft_ul);
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printf("\t-f Preamble format [Default 0]\n");
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printf("\t-r Root sequence index [Default 0]\n");
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printf("\t-z Zero correlation zone config [Default 1]\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, "Nfrz")) != -1) {
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switch (opt) {
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case 'N':
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N_ifft_ul = atoi(argv[optind]);
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break;
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case 'f':
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config_idx = atoi(argv[optind]);
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break;
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case 'r':
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root_seq_idx = atoi(argv[optind]);
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break;
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case 'z':
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zero_corr_zone = atoi(argv[optind]);
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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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parse_args(argc, argv);
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srslte_prach_t *p = (srslte_prach_t*)malloc(sizeof(srslte_prach_t));
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bool high_speed_flag = false;
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cf_t preamble[MAX_LEN];
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memset(preamble, 0, sizeof(cf_t)*MAX_LEN);
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srslte_prach_init(p,
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N_ifft_ul,
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config_idx,
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root_seq_idx,
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high_speed_flag,
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zero_corr_zone);
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uint32_t seq_index = 0;
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uint32_t frequency_offset = 0;
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uint32_t indices[64];
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uint32_t n_indices = 0;
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for(int i=0;i<64;i++)
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indices[i] = 0;
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for(seq_index=0;seq_index<64;seq_index++)
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{
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srslte_prach_gen(p,
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seq_index,
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frequency_offset,
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preamble);
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uint32_t prach_len = p->N_seq;
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struct timeval t[3];
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gettimeofday(&t[1], NULL);
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srslte_prach_detect(p, frequency_offset, &preamble[p->N_cp], prach_len, indices, &n_indices);
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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printf("texec=%ld us\n", t[0].tv_usec);
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if(n_indices != 1 || indices[0] != seq_index)
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return -1;
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}
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srslte_prach_free(p);
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free(p);
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printf("Done\n");
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exit(0);
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}
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