mirror of https://github.com/pvnis/srsRAN_4G.git
Fixed PRS sequence generation
ismagom
11 years ago
parent
c328a29e39
commit
893cab84f1
@ -1,130 +0,0 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <unistd.h>
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#include "lte.h"
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char *input_file_name;
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int frame_length=1920, symbol_sz=128, nof_slots=1;
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void usage(char *prog) {
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printf("Usage: %s [ls] -i input_file\n", prog);
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printf("\t-l frame_length [Default %d]\n", frame_length);
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printf("\t-s symbol_sz [Default %d]\n", symbol_sz);
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printf("\t-n nof_frames [Default %d]\n", nof_slots);
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printf("\t-v [set 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, "ilsnv")) != -1) {
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switch(opt) {
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case 'i':
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input_file_name = argv[optind];
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break;
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case 'l':
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frame_length = atoi(argv[optind]);
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break;
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case 's':
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symbol_sz = atoi(argv[optind]);
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break;
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case 'n':
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nof_slots = atoi(argv[optind]);
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break;
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case 'v':
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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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if (!input_file_name) {
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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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void fft_run_slot(dft_plan_t *fft_plan, cf_t *input, cf_t *output) {
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int i;
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for (i=0;i<7;i++) {
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input += CP_NORM(i, symbol_sz);
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dft_run_c2c(fft_plan, input, output);
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input += symbol_sz;
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output += symbol_sz;
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}
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}
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int main(int argc, char **argv) {
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filesource_t fsrc;
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pbch_mib_t pbch_data;
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pbch_t pbch;
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dft_plan_t fft_plan;
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int frame_cnt;
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cf_t *input, *outfft;
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if (argc < 3) {
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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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if (filesource_init(&fsrc, input_file_name, COMPLEX_FLOAT)) {
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fprintf(stderr, "Error opening file %s\n", input_file_name);
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exit(-1);
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}
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input = malloc(frame_length*sizeof(cf_t));
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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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outfft = malloc(7*symbol_sz*sizeof(cf_t));
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if (!outfft) {
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perror("malloc");
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exit(-1);
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}
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/* Init FFT plan */
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if (dft_plan_c2c(symbol_sz, FORWARD, &fft_plan)) {
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fprintf(stderr, "Error initiating FFT plan\n");
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exit(-1);
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}
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fft_plan.options = DFT_DC_OFFSET | DFT_MIRROR_POS | DFT_NORMALIZE;
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if (pbch_init(&pbch, 0, CPNORM)) {
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fprintf(stderr, "Error initiating PBCH\n");
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exit(-1);
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}
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int res = 0;
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frame_cnt = 0;
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while (frame_length == filesource_read(&fsrc, input, frame_length)
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&& frame_cnt < nof_slots
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&& res == 0) {
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fft_run_slot(&fft_plan, &input[960], outfft);
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res = pbch_decode(&pbch, outfft, &pbch_data, 6, 1);
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if (res == -1) {
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fprintf(stderr, "Error decoding PBCH\n");
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break;
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}
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frame_cnt++;
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}
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if (res == 1) {
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printf("MIB found\n");
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} else {
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printf("MIB not found after %d frames\n", frame_cnt);
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}
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pbch_free(&pbch);
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free(input);
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free(outfft);
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printf("Done\n");
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exit(0);
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}
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