mirror of https://github.com/PentHertz/srsLTE.git
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
#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 <complex.h>
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#include "srslte/phch/prach.h"
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#define MAX_LEN 70176
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uint32_t N_ifft_ul = 128;
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uint32_t preamble_format = 0;
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uint32_t root_seq_idx = 0;
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uint32_t zero_corr_zone = 1;
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uint32_t n_seqs = 64;
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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 128]\n");
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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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printf("\t-n Number of sequences used for each test [Default 64]\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, "Nfrzn")) != -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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preamble_format = 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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case 'n':
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n_seqs = 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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cf_t preamble_sum[MAX_LEN];
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memset(preamble_sum, 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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preamble_format,
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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<n_seqs;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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for(int i=0;i<p->N_cp+p->N_seq;i++)
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{
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preamble_sum[i] += preamble[i];
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}
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}
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uint32_t prach_len = p->N_seq;
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if(preamble_format == 2 || preamble_format == 3)
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prach_len /= 2;
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srslte_prach_detect(p, 0, &preamble_sum[p->N_cp], prach_len, indices, &n_indices);
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if(n_indices != n_seqs)
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return -1;
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for(int i=0;i<n_seqs;i++)
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{
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if(indices[i] != i)
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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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