2014-06-17 03:44:42 -07:00
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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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* libLTE 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 Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser 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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2014-06-17 08:11:40 -07:00
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#include "liblte/phy/phy.h"
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2014-06-17 03:44:42 -07:00
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char *input_file_name = NULL;
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char *matlab_file_name = NULL;
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2014-06-29 10:51:25 -07:00
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lte_cell_t cell = {
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6, // nof_prb
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1, // nof_ports
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0, // cell_id
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CPNORM // cyclic prefix
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};
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2014-06-17 03:44:42 -07:00
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int flen;
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2014-06-29 10:51:25 -07:00
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2014-07-01 01:48:51 -07:00
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uint32_t cfi = 2;
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2014-06-29 10:51:25 -07:00
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uint16_t rnti = SIRNTI;
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2014-06-17 03:44:42 -07:00
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int max_frames = 10;
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FILE *fmatlab = NULL;
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filesource_t fsrc;
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pdcch_t pdcch;
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pdsch_t pdsch;
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2014-07-07 11:42:10 -07:00
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pdsch_harq_t harq_process;
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2014-06-27 09:36:25 -07:00
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cf_t *input_buffer, *fft_buffer, *ce[MAX_PORTS];
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2014-06-17 03:44:42 -07:00
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regs_t regs;
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lte_fft_t fft;
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chest_t chest;
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void usage(char *prog) {
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2014-06-27 09:36:25 -07:00
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printf("Usage: %s [vcfoe] -i input_file\n", prog);
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printf("\t-o output matlab file name [Default Disabled]\n");
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2014-06-29 10:51:25 -07:00
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printf("\t-c cell.id [Default %d]\n", cell.id);
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2014-06-27 09:36:25 -07:00
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printf("\t-f cfi [Default %d]\n", cfi);
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printf("\t-r rnti [Default SI-RNTI]\n");
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2014-06-29 10:51:25 -07:00
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printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
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printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
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2014-06-27 09:36:25 -07:00
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printf("\t-m max_frames [Default %d]\n", max_frames);
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printf("\t-e Set extended prefix [Default Normal]\n");
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printf("\t-v [set verbose to debug, default none]\n");
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2014-06-17 03:44:42 -07:00
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}
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void parse_args(int argc, char **argv) {
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2014-06-27 09:36:25 -07:00
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int opt;
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while ((opt = getopt(argc, argv, "irovfcenmp")) != -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 'c':
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2014-06-29 10:51:25 -07:00
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cell.id = atoi(argv[optind]);
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2014-06-27 09:36:25 -07:00
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break;
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case 'r':
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rnti = strtoul(argv[optind], NULL, 0);
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break;
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case 'm':
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max_frames = strtoul(argv[optind], NULL, 0);
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break;
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case 'f':
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cfi = atoi(argv[optind]);
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break;
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case 'n':
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2014-06-29 10:51:25 -07:00
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cell.nof_prb = atoi(argv[optind]);
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2014-06-27 09:36:25 -07:00
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break;
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case 'p':
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2014-06-29 10:51:25 -07:00
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cell.nof_ports = atoi(argv[optind]);
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2014-06-27 09:36:25 -07:00
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break;
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case 'o':
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matlab_file_name = 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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case 'e':
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2014-06-29 10:51:25 -07:00
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cell.cp = CPEXT;
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2014-06-27 09:36:25 -07:00
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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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2014-06-17 03:44:42 -07:00
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}
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int base_init() {
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2014-06-27 09:36:25 -07:00
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int i;
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if (filesource_init(&fsrc, input_file_name, COMPLEX_FLOAT_BIN)) {
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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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if (matlab_file_name) {
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fmatlab = fopen(matlab_file_name, "w");
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if (!fmatlab) {
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perror("fopen");
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return -1;
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}
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} else {
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fmatlab = NULL;
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}
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2014-06-29 10:51:25 -07:00
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flen = 2 * (SLOT_LEN(lte_symbol_sz(cell.nof_prb), cell.cp));
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2014-06-27 09:36:25 -07:00
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input_buffer = malloc(flen * sizeof(cf_t));
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if (!input_buffer) {
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perror("malloc");
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exit(-1);
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}
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2014-06-29 10:51:25 -07:00
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fft_buffer = malloc(2 * CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
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2014-06-27 09:36:25 -07:00
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if (!fft_buffer) {
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perror("malloc");
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return -1;
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}
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for (i=0;i<MAX_PORTS;i++) {
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2014-06-29 10:51:25 -07:00
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ce[i] = malloc(2 * CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
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2014-06-27 09:36:25 -07:00
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if (!ce[i]) {
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perror("malloc");
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return -1;
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}
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}
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2014-06-29 10:51:25 -07:00
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if (chest_init_LTEDL(&chest, LINEAR, cell)) {
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2014-06-27 09:36:25 -07:00
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fprintf(stderr, "Error initializing equalizer\n");
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return -1;
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}
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2014-06-29 10:51:25 -07:00
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if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
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2014-06-27 09:36:25 -07:00
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fprintf(stderr, "Error initializing FFT\n");
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return -1;
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}
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2014-06-29 10:51:25 -07:00
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if (regs_init(®s, R_1, PHICH_NORM, cell)) {
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2014-06-27 09:36:25 -07:00
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fprintf(stderr, "Error initiating regs\n");
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return -1;
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}
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if (regs_set_cfi(®s, cfi)) {
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fprintf(stderr, "Error setting CFI %d\n", cfi);
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return -1;
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}
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2014-06-29 10:51:25 -07:00
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if (pdcch_init(&pdcch, ®s, cell)) {
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2014-06-27 09:36:25 -07:00
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fprintf(stderr, "Error creating PDCCH object\n");
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exit(-1);
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}
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2014-06-29 10:51:25 -07:00
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if (pdsch_init(&pdsch, rnti, cell)) {
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fprintf(stderr, "Error creating PDSCH object\n");
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2014-06-27 09:36:25 -07:00
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exit(-1);
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}
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2014-07-07 11:42:10 -07:00
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if (pdsch_harq_init(&harq_process, &pdsch)) {
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fprintf(stderr, "Error initiating HARQ process\n");
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exit(-1);
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}
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2014-06-27 09:36:25 -07:00
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DEBUG("Memory init OK\n",0);
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return 0;
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2014-06-17 03:44:42 -07:00
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}
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void base_free() {
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2014-06-27 09:36:25 -07:00
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int i;
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filesource_free(&fsrc);
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if (fmatlab) {
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fclose(fmatlab);
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}
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free(input_buffer);
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free(fft_buffer);
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filesource_free(&fsrc);
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for (i=0;i<MAX_PORTS;i++) {
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free(ce[i]);
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}
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chest_free(&chest);
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lte_fft_free(&fft);
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pdcch_free(&pdcch);
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pdsch_free(&pdsch);
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2014-07-07 11:42:10 -07:00
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pdsch_harq_free(&harq_process);
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2014-06-27 09:36:25 -07:00
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regs_free(®s);
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2014-06-17 03:44:42 -07:00
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}
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int main(int argc, char **argv) {
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2014-06-27 09:36:25 -07:00
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ra_pdsch_t ra_dl;
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ra_prb_t prb_alloc;
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int i;
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int nof_frames;
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int ret;
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char *data;
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2014-07-05 12:00:32 -07:00
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dci_location_t locations[10];
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uint32_t nof_locations;
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dci_msg_t dci_msg;
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2014-06-27 09:36:25 -07:00
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data = malloc(10000);
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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 (base_init()) {
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fprintf(stderr, "Error initializing memory\n");
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exit(-1);
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}
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if (rnti == SIRNTI) {
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INFO("Initializing common search space for SI-RNTI\n",0);
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2014-07-05 12:00:32 -07:00
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nof_locations = pdcch_common_locations(&pdcch, locations, 10, cfi);
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2014-06-27 09:36:25 -07:00
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} else {
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2014-07-05 12:00:32 -07:00
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// For ue-specific, generate locations for subframe 5
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2014-06-27 09:36:25 -07:00
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INFO("Initializing user-specific search space for RNTI: 0x%x\n", rnti);
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2014-07-05 12:00:32 -07:00
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nof_locations = pdcch_ue_locations(&pdcch, locations, 10, 5, cfi, rnti);
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2014-06-27 09:36:25 -07:00
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}
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2014-07-05 12:00:32 -07:00
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2014-06-27 09:36:25 -07:00
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ret = -1;
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nof_frames = 0;
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do {
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filesource_read(&fsrc, input_buffer, flen);
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if (nof_frames == 5) {
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INFO("Reading %d samples sub-frame %d\n", flen, nof_frames);
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2014-06-29 10:51:25 -07:00
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lte_fft_run_sf(&fft, input_buffer, fft_buffer);
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2014-06-27 09:36:25 -07:00
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if (fmatlab) {
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fprintf(fmatlab, "infft%d=", nof_frames);
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vec_fprint_c(fmatlab, input_buffer, flen);
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fprintf(fmatlab, ";\n");
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fprintf(fmatlab, "outfft%d=", nof_frames);
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2014-06-29 10:51:25 -07:00
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vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
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vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
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2014-06-27 09:36:25 -07:00
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fprintf(fmatlab, ";\n");
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2014-06-29 10:51:25 -07:00
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vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
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2014-06-27 09:36:25 -07:00
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}
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/* Get channel estimates for each port */
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2014-06-29 10:51:25 -07:00
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for (i=0;i<cell.nof_ports;i++) {
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2014-06-27 09:36:25 -07:00
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chest_ce_slot_port(&chest, fft_buffer, ce[i], 2*nof_frames, i);
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2014-06-29 10:51:25 -07:00
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chest_ce_slot_port(&chest, &fft_buffer[CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB],
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&ce[i][CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB], 2*nof_frames+1, i);
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2014-06-27 09:36:25 -07:00
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if (fmatlab) {
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chest_fprint(&chest, fmatlab, 2*nof_frames+1, i);
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}
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}
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2014-07-05 12:00:32 -07:00
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2014-07-06 12:08:11 -07:00
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uint16_t crc_rem = 0;
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for (i=0;i<nof_locations && crc_rem != rnti;i++) {
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if (pdcch_extract_llr(&pdcch, fft_buffer, ce, locations[i], nof_frames, cfi)) {
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fprintf(stderr, "Error extracting LLRs\n");
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return -1;
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}
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if (pdcch_decode_msg(&pdcch, &dci_msg, Format1A, &crc_rem)) {
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fprintf(stderr, "Error decoding DCI msg\n");
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return -1;
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}
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2014-07-05 12:00:32 -07:00
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}
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2014-07-06 12:08:11 -07:00
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if (crc_rem == rnti) {
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2014-06-27 09:36:25 -07:00
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dci_msg_type_t type;
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2014-07-05 12:00:32 -07:00
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if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti, 1234)) {
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2014-06-27 09:36:25 -07:00
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fprintf(stderr, "Can't get DCI message type\n");
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goto goout;
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}
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2014-07-07 11:42:10 -07:00
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2014-06-27 09:36:25 -07:00
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dci_msg_type_fprint(stdout, type);
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switch(type.type) {
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|
|
case PDSCH_SCHED:
|
|
|
|
bzero(&ra_dl, sizeof(ra_pdsch_t));
|
2014-07-05 12:00:32 -07:00
|
|
|
if (dci_msg_unpack_pdsch(&dci_msg, &ra_dl, cell.nof_prb, rnti != SIRNTI)) {
|
2014-06-27 09:36:25 -07:00
|
|
|
fprintf(stderr, "Can't unpack PDSCH message\n");
|
|
|
|
} else {
|
2014-06-29 10:51:25 -07:00
|
|
|
ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb);
|
2014-06-27 09:36:25 -07:00
|
|
|
if (ra_dl.alloc_type == alloc_type2 && ra_dl.type2_alloc.mode == t2_loc
|
|
|
|
&& ra_dl.type2_alloc.riv == 11 && ra_dl.rv_idx == 0
|
|
|
|
&& ra_dl.harq_process == 0 && ra_dl.mcs.mcs_idx == 2) {
|
|
|
|
printf("This is the file signal.1.92M.amar.dat\n");
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
fprintf(stderr, "Unsupported message type\n");
|
|
|
|
break;
|
|
|
|
}
|
2014-06-29 10:51:25 -07:00
|
|
|
if (ra_prb_get_dl(&prb_alloc, &ra_dl, cell.nof_prb)) {
|
2014-06-27 09:36:25 -07:00
|
|
|
fprintf(stderr, "Error computing resource allocation\n");
|
|
|
|
goto goout;
|
|
|
|
}
|
2014-06-29 15:44:39 -07:00
|
|
|
ra_prb_get_re_dl(&prb_alloc, cell.nof_prb, cell.nof_ports, cell.nof_prb<10?(cfi+1):cfi, cell.cp);
|
2014-06-27 09:36:25 -07:00
|
|
|
|
2014-07-07 11:42:10 -07:00
|
|
|
if (pdsch_harq_setup(&harq_process, ra_dl.mcs, &prb_alloc)) {
|
|
|
|
fprintf(stderr, "Error configuring HARQ process\n");
|
|
|
|
goto goout;
|
|
|
|
}
|
|
|
|
if (pdsch_decode(&pdsch, fft_buffer, ce, data, nof_frames%10, &harq_process, ra_dl.rv_idx)) {
|
2014-06-27 09:36:25 -07:00
|
|
|
fprintf(stderr, "Error decoding PDSCH\n");
|
|
|
|
goto goout;
|
|
|
|
} else {
|
|
|
|
printf("PDSCH Decoded OK!\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
nof_frames++;
|
|
|
|
} while (nof_frames <= max_frames);
|
2014-06-17 03:44:42 -07:00
|
|
|
|
|
|
|
goout:
|
2014-06-20 07:35:37 -07:00
|
|
|
base_free();
|
2014-06-27 09:36:25 -07:00
|
|
|
exit(ret);
|
2014-06-17 03:44:42 -07:00
|
|
|
}
|