mirror of https://github.com/PentHertz/srsLTE.git
119 lines
2.5 KiB
C
119 lines
2.5 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 <math.h>
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#include <time.h>
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#include <stdbool.h>
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#include "srslte/srslte.h"
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#define MAX_MSE 0.1
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float freq = 0;
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int num_samples = 1000;
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void usage(char *prog) {
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printf("Usage: %s -f freq -n num_samples\n", prog);
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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, "nf")) != -1) {
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switch (opt) {
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case 'n':
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num_samples = atoi(argv[optind]);
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break;
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case 'f':
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freq = atof(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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int i;
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cf_t *input, *output;
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srslte_cfo_t cfocorr;
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float mse;
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if (argc < 5) {
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usage(argv[0]);
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exit(-1);
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}
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parse_args(argc, argv);
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input = malloc(sizeof(cf_t) * num_samples);
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if (!input) {
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perror("malloc");
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exit(-1);
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}
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output = malloc(sizeof(cf_t) * num_samples);
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if (!output) {
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perror("malloc");
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exit(-1);
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}
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for (i=0;i<num_samples;i++) {
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input[i] = 100 * (rand()/RAND_MAX + I*rand()/RAND_MAX);
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output[i] = input[i];
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}
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if (srslte_cfo_init(&cfocorr, num_samples)) {
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fprintf(stderr, "Error initiating CFO\n");
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return -1;
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}
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srslte_cfo_correct(&cfocorr, output, output, freq);
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srslte_cfo_correct(&cfocorr, output, output, -freq);
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mse = 0;
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for (i=0;i<num_samples;i++) {
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mse += cabsf(input[i] - output[i]) / num_samples;
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}
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srslte_cfo_free(&cfocorr);
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free(input);
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free(output);
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printf("MSE: %f\n", mse);
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if (mse > MAX_MSE) {
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printf("MSE too large\n");
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exit(-1);
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} else {
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printf("Ok\n");
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exit(0);
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}
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}
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