mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
293 lines
7.7 KiB
C
293 lines
7.7 KiB
C
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2014 The srsLTE Developers. See the
|
|
* COPYRIGHT file at the top-level directory of this distribution.
|
|
*
|
|
* \section LICENSE
|
|
*
|
|
* This file is part of the srsLTE library.
|
|
*
|
|
* srsLTE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsLTE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* A copy of the GNU Lesser General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <unistd.h>
|
|
|
|
#include "srslte/srslte.h"
|
|
|
|
char *input_file_name = NULL;
|
|
|
|
#define MAX_CANDIDATES 64
|
|
|
|
srslte_cell_t cell = {
|
|
6, // cell.cell.cell.nof_prb
|
|
1, // cell.cell.nof_ports
|
|
0, // bw_idx
|
|
0, // cell.id
|
|
SRSLTE_SRSLTE_CP_NORM, // cyclic prefix
|
|
SRSLTE_PHICH_R_1, // PHICH resources
|
|
SRSLTE_PHICH_NORM // PHICH length
|
|
};
|
|
|
|
uint32_t cfi = 2;
|
|
int flen;
|
|
uint16_t rnti = SRSLTE_SIRNTI;
|
|
int max_frames = 10;
|
|
|
|
srslte_dci_format_t dci_format = SRSLTE_DCI_FORMAT1A;
|
|
srslte_filesource_t fsrc;
|
|
srslte_pdcch_t pdcch;
|
|
cf_t *input_buffer, *fft_buffer, *ce[SRSLTE_MAX_PORTS];
|
|
srslte_regs_t regs;
|
|
srslte_ofdm_t fft;
|
|
srslte_chest_dl_t chest;
|
|
|
|
void usage(char *prog) {
|
|
printf("Usage: %s [vcfoe] -i input_file\n", prog);
|
|
printf("\t-c cell.id [Default %d]\n", cell.id);
|
|
printf("\t-f cfi [Default %d]\n", cfi);
|
|
printf("\t-o DCI Format [Default %s]\n", srslte_dci_format_string(dci_format));
|
|
printf("\t-r rnti [Default SI-RNTI]\n");
|
|
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
|
|
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
|
|
printf("\t-m max_frames [Default %d]\n", max_frames);
|
|
printf("\t-e Set extended prefix [Default Normal]\n");
|
|
printf("\t-v [set srslte_verbose to debug, default none]\n");
|
|
}
|
|
|
|
void parse_args(int argc, char **argv) {
|
|
int opt;
|
|
while ((opt = getopt(argc, argv, "irvofcenmp")) != -1) {
|
|
switch(opt) {
|
|
case 'i':
|
|
input_file_name = argv[optind];
|
|
break;
|
|
case 'c':
|
|
cell.id = atoi(argv[optind]);
|
|
break;
|
|
case 'r':
|
|
rnti = strtoul(argv[optind], NULL, 0);
|
|
break;
|
|
case 'm':
|
|
max_frames = strtoul(argv[optind], NULL, 0);
|
|
break;
|
|
case 'f':
|
|
cfi = atoi(argv[optind]);
|
|
break;
|
|
case 'n':
|
|
cell.nof_prb = atoi(argv[optind]);
|
|
break;
|
|
case 'p':
|
|
cell.nof_ports = atoi(argv[optind]);
|
|
break;
|
|
case 'o':
|
|
dci_format = srslte_dci_format_from_string(argv[optind]);
|
|
if (dci_format == SRSLTE_DCI_FORMAT_ERROR) {
|
|
fprintf(stderr, "Error unsupported format %s\n", argv[optind]);
|
|
exit(-1);
|
|
}
|
|
break;
|
|
case 'v':
|
|
srslte_verbose++;
|
|
break;
|
|
case 'e':
|
|
cell.cp = SRSLTE_SRSLTE_CP_EXT;
|
|
break;
|
|
default:
|
|
usage(argv[0]);
|
|
exit(-1);
|
|
}
|
|
}
|
|
if (!input_file_name) {
|
|
usage(argv[0]);
|
|
exit(-1);
|
|
}
|
|
}
|
|
|
|
int base_init() {
|
|
int i;
|
|
|
|
if (srslte_filesource_init(&fsrc, input_file_name, SRSLTE_COMPLEX_FLOAT_BIN)) {
|
|
fprintf(stderr, "Error opening file %s\n", input_file_name);
|
|
exit(-1);
|
|
}
|
|
|
|
flen = 2 * (SRSLTE_SLOT_LEN(srslte_symbol_sz(cell.nof_prb)));
|
|
|
|
input_buffer = malloc(flen * sizeof(cf_t));
|
|
if (!input_buffer) {
|
|
perror("malloc");
|
|
exit(-1);
|
|
}
|
|
|
|
fft_buffer = malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
|
|
if (!fft_buffer) {
|
|
perror("malloc");
|
|
return -1;
|
|
}
|
|
|
|
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
|
|
ce[i] = malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
|
|
if (!ce[i]) {
|
|
perror("malloc");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (srslte_chest_dl_init(&chest, cell)) {
|
|
fprintf(stderr, "Error initializing equalizer\n");
|
|
return -1;
|
|
}
|
|
|
|
if (srslte_ofdm_tx_init(&fft, cell.cp, cell.nof_prb)) {
|
|
fprintf(stderr, "Error initializing FFT\n");
|
|
return -1;
|
|
}
|
|
|
|
if (srslte_regs_init(®s, cell)) {
|
|
fprintf(stderr, "Error initiating regs\n");
|
|
return -1;
|
|
}
|
|
|
|
if (srslte_regs_set_cfi(®s, cfi)) {
|
|
fprintf(stderr, "Error setting CFI %d\n", cfi);
|
|
return -1;
|
|
}
|
|
if (srslte_pdcch_init(&pdcch, ®s, cell)) {
|
|
fprintf(stderr, "Error creating PDCCH object\n");
|
|
exit(-1);
|
|
}
|
|
|
|
DEBUG("Memory init OK\n",0);
|
|
return 0;
|
|
}
|
|
|
|
void base_free() {
|
|
int i;
|
|
|
|
srslte_filesource_free(&fsrc);
|
|
|
|
free(input_buffer);
|
|
free(fft_buffer);
|
|
|
|
srslte_filesource_free(&fsrc);
|
|
for (i=0;i<SRSLTE_MAX_PORTS;i++) {
|
|
free(ce[i]);
|
|
}
|
|
srslte_chest_dl_free(&chest);
|
|
srslte_ofdm_tx_free(&fft);
|
|
|
|
srslte_pdcch_free(&pdcch);
|
|
srslte_regs_free(®s);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
srslte_ra_pdsch_t ra_dl;
|
|
int i;
|
|
int frame_cnt;
|
|
int ret;
|
|
srslte_dci_location_t locations[MAX_CANDIDATES];
|
|
uint32_t nof_locations;
|
|
srslte_dci_msg_t dci_msg;
|
|
|
|
if (argc < 3) {
|
|
usage(argv[0]);
|
|
exit(-1);
|
|
}
|
|
|
|
parse_args(argc,argv);
|
|
|
|
if (base_init()) {
|
|
fprintf(stderr, "Error initializing memory\n");
|
|
exit(-1);
|
|
}
|
|
|
|
ret = -1;
|
|
frame_cnt = 0;
|
|
do {
|
|
srslte_filesource_read(&fsrc, input_buffer, flen);
|
|
|
|
INFO("Reading %d samples sub-frame %d\n", flen, frame_cnt);
|
|
|
|
srslte_ofdm_tx_sf(&fft, input_buffer, fft_buffer);
|
|
|
|
/* Get channel estimates for each port */
|
|
srslte_chest_dl_estimate(&chest, fft_buffer, ce, frame_cnt %10);
|
|
|
|
uint16_t srslte_crc_rem = 0;
|
|
if (srslte_pdcch_extract_llr(&pdcch, fft_buffer,
|
|
ce, srslte_chest_dl_get_noise_estimate(&chest),
|
|
frame_cnt %10, cfi)) {
|
|
fprintf(stderr, "Error extracting LLRs\n");
|
|
return -1;
|
|
}
|
|
if (rnti == SRSLTE_SIRNTI) {
|
|
INFO("Initializing common search space for SI-RNTI\n",0);
|
|
nof_locations = srslte_pdcch_common_locations(&pdcch, locations, MAX_CANDIDATES, cfi);
|
|
} else {
|
|
INFO("Initializing user-specific search space for RNTI: 0x%x\n", rnti);
|
|
nof_locations = srslte_pdcch_ue_locations(&pdcch, locations, MAX_CANDIDATES, frame_cnt %10, cfi, rnti);
|
|
}
|
|
|
|
for (i=0;i<nof_locations && srslte_crc_rem != rnti;i++) {
|
|
if (srslte_pdcch_decode_msg(&pdcch, &dci_msg, &locations[i], dci_format, &srslte_crc_rem)) {
|
|
fprintf(stderr, "Error decoding DCI msg\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (srslte_crc_rem == rnti) {
|
|
srslte_dci_msg_type_t type;
|
|
if (srslte_dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti)) {
|
|
fprintf(stderr, "Can't get DCI message type\n");
|
|
exit(-1);
|
|
}
|
|
printf("MSG %d: ",i);
|
|
srslte_dci_msg_type_fprint(stdout, type);
|
|
switch(type.type) {
|
|
case SRSLTE_DCI_MSG_TYPE_PDSCH_SCHED:
|
|
bzero(&ra_dl, sizeof(srslte_ra_pdsch_t));
|
|
if (srslte_dci_msg_unpack_pdsch(&dci_msg, &ra_dl, cell.nof_prb, rnti != SRSLTE_SIRNTI)) {
|
|
fprintf(stderr, "Can't unpack PDSCH message\n");
|
|
} else {
|
|
srslte_ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb);
|
|
if (ra_dl.alloc_type == SRSLTE_RA_ALLOC_TYPE2 && ra_dl.type2_alloc.mode == SRSLTE_RA_TYPE2_LOC
|
|
&& ra_dl.type2_alloc.riv == 11 && ra_dl.rv_idx == 0
|
|
&& ra_dl.harq_process == 0 && ra_dl.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;
|
|
}
|
|
|
|
}
|
|
|
|
frame_cnt++;
|
|
} while (frame_cnt <= max_frames);
|
|
|
|
base_free();
|
|
exit(ret);
|
|
}
|