2019-04-26 12:27:38 -07:00
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/*
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* Copyright 2013-2019 Software Radio Systems Limited
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2017-10-03 06:50:58 -07:00
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*
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2019-04-26 12:27:38 -07:00
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* This file is part of srsLTE.
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2017-10-03 06:50:58 -07:00
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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 "srslte/srslte.h"
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2019-12-16 07:04:22 -08:00
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char* input_file_name = NULL;
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2017-10-03 06:50:58 -07:00
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srslte_cell_t cell = {
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2019-04-23 01:53:11 -07:00
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100, // nof_prb
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1, // nof_ports
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1, // cell_id
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SRSLTE_CP_EXT, // cyclic prefix
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SRSLTE_PHICH_NORM, // PHICH length
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SRSLTE_PHICH_R_1_6,
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SRSLTE_FDD,
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2017-10-03 06:50:58 -07:00
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};
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int flen;
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uint32_t cfi = 2;
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2019-12-16 07:04:22 -08:00
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int max_frames = 150;
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uint32_t sf_idx = 1;
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2017-10-03 06:50:58 -07:00
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uint8_t non_mbsfn_region = 2;
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2019-12-16 07:04:22 -08:00
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int mbsfn_area_id = 1;
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2017-10-03 06:50:58 -07:00
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2019-04-23 01:53:11 -07:00
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srslte_softbuffer_rx_t softbuffer_rx;
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2019-12-16 07:04:22 -08:00
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srslte_filesource_t fsrc;
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srslte_ue_dl_t ue_dl;
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cf_t* input_buffer[SRSLTE_MAX_PORTS];
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2017-10-03 06:50:58 -07:00
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2019-12-16 07:04:22 -08:00
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void usage(char* prog)
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{
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2019-04-23 01:53:11 -07:00
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printf("Usage: %s [rvfcenmps] -i input_file\n", prog);
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2017-10-03 06:50:58 -07:00
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printf("\t-c cell.id [Default %d]\n", cell.id);
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printf("\t-s Start subframe_idx [Default %d]\n", sf_idx);
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printf("\t-f cfi [Default %d]\n", cfi);
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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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printf("\t-M mbsfn_area_id [Default %d]\n", mbsfn_area_id);
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printf("\t-e Set extended prefix [Default Normal]\n");
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printf("\t-v [set srslte_verbose to debug, default none]\n");
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}
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2019-12-16 07:04:22 -08:00
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void parse_args(int argc, char** argv)
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{
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int opt;
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while ((opt = getopt(argc, argv, "ivfcenmps")) != -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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cell.id = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 's':
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sf_idx = (int)strtol(argv[optind], NULL, 10);
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break;
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case 'f':
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cfi = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 'n':
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cell.nof_prb = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 'p':
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cell.nof_ports = (uint32_t)strtol(argv[optind], NULL, 10);
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break;
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case 'M':
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mbsfn_area_id = (int)strtol(argv[optind], NULL, 10);
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break;
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case 'v':
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srslte_verbose++;
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break;
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case 'e':
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cell.cp = SRSLTE_CP_EXT;
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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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2017-10-03 06:50:58 -07:00
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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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2019-12-16 07:04:22 -08:00
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int base_init()
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{
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2017-10-03 06:50:58 -07:00
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if (srslte_filesource_init(&fsrc, input_file_name, SRSLTE_COMPLEX_FLOAT_BIN)) {
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2019-04-23 01:53:11 -07:00
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ERROR("Error opening file %s\n", input_file_name);
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2017-10-03 06:50:58 -07:00
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exit(-1);
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}
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flen = 2 * (SRSLTE_SLOT_LEN(srslte_symbol_sz(cell.nof_prb)));
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input_buffer[0] = malloc(flen * sizeof(cf_t));
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if (!input_buffer[0]) {
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perror("malloc");
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exit(-1);
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}
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2017-10-20 07:09:27 -07:00
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if (srslte_ue_dl_init(&ue_dl, input_buffer, cell.nof_prb, 1)) {
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2019-04-23 01:53:11 -07:00
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ERROR("Error initializing UE DL\n");
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2017-10-03 06:50:58 -07:00
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return -1;
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}
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if (srslte_ue_dl_set_cell(&ue_dl, cell)) {
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ERROR("Error initializing UE DL\n");
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2017-10-03 06:50:58 -07:00
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return -1;
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}
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srslte_ue_dl_set_mbsfn_area_id(&ue_dl, mbsfn_area_id);
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srslte_ue_dl_set_non_mbsfn_region(&ue_dl, non_mbsfn_region);
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2019-04-23 01:53:11 -07:00
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srslte_softbuffer_rx_init(&softbuffer_rx, cell.nof_prb);
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srslte_softbuffer_rx_reset(&softbuffer_rx);
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2017-10-12 01:31:08 -07:00
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DEBUG("Memory init OK\n");
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2017-10-03 06:50:58 -07:00
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return 0;
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}
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2019-12-16 07:04:22 -08:00
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void base_free()
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{
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2017-10-03 06:50:58 -07:00
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srslte_filesource_free(&fsrc);
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srslte_ue_dl_free(&ue_dl);
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free(input_buffer[0]);
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}
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2019-12-16 07:04:22 -08:00
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int main(int argc, char** argv)
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{
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2017-10-03 06:50:58 -07:00
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int ret;
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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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2019-12-16 07:04:22 -08:00
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parse_args(argc, argv);
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2019-04-29 01:29:09 -07:00
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srslte_use_standard_symbol_size(false);
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2017-10-03 06:50:58 -07:00
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if (base_init()) {
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ERROR("Error initializing memory\n");
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2017-10-03 06:50:58 -07:00
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exit(-1);
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}
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2019-12-16 07:04:22 -08:00
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uint8_t* data = malloc(100000);
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2018-02-06 07:42:43 -08:00
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if (!data) {
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perror("malloc");
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exit(-1);
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}
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2017-10-03 06:50:58 -07:00
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ret = -1;
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srslte_filesource_read(&fsrc, input_buffer[0], flen);
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INFO("Reading %d samples sub-frame %d\n", flen, sf_idx);
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2019-04-23 01:53:11 -07:00
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srslte_dl_sf_cfg_t dl_sf;
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ZERO_OBJECT(dl_sf);
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dl_sf.cfi = cfi;
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dl_sf.tti = sf_idx;
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dl_sf.sf_type = SRSLTE_SF_MBSFN;
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srslte_ue_dl_cfg_t ue_dl_cfg;
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ZERO_OBJECT(ue_dl_cfg);
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ue_dl_cfg.chest_cfg.mbsfn_area_id = mbsfn_area_id;
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// Special configuration for MBSFN channel estimation
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ue_dl_cfg.chest_cfg.filter_type = SRSLTE_CHEST_FILTER_TRIANGLE;
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ue_dl_cfg.chest_cfg.filter_coef[0] = 0.1;
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ue_dl_cfg.chest_cfg.interpolate_subframe = true;
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ue_dl_cfg.chest_cfg.noise_alg = SRSLTE_NOISE_ALG_PSS;
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if ((ret = srslte_ue_dl_decode_fft_estimate(&ue_dl, &dl_sf, &ue_dl_cfg)) < 0) {
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return ret;
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}
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dl_sf.cfi = cfi;
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srslte_pmch_cfg_t pmch_cfg;
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ZERO_OBJECT(pmch_cfg);
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pmch_cfg.area_id = mbsfn_area_id;
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pmch_cfg.pdsch_cfg.softbuffers.rx[0] = &softbuffer_rx;
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srslte_dci_dl_t dci;
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ZERO_OBJECT(dci);
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dci.rnti = SRSLTE_MRNTI;
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dci.format = SRSLTE_DCI_FORMAT1;
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dci.alloc_type = SRSLTE_RA_ALLOC_TYPE0;
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dci.type0_alloc.rbg_bitmask = 0xffffffff;
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dci.tb[0].mcs_idx = 2;
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SRSLTE_DCI_TB_DISABLE(dci.tb[1]);
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2019-06-27 09:52:20 -07:00
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srslte_ra_dl_dci_to_grant(&cell, &dl_sf, SRSLTE_TM1, false, &dci, &pmch_cfg.pdsch_cfg.grant);
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2019-04-23 01:53:11 -07:00
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srslte_pdsch_res_t pdsch_res;
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pdsch_res.payload = data;
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ret = srslte_ue_dl_decode_pmch(&ue_dl, &dl_sf, &pmch_cfg, &pdsch_res);
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2019-04-29 01:29:09 -07:00
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if (pdsch_res.crc == 1) {
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printf("PMCH Decoded OK!\n");
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} else if (pdsch_res.crc == 0) {
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2017-10-03 06:50:58 -07:00
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printf("Error decoding PMCH\n");
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}
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base_free();
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2018-02-06 07:42:43 -08:00
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if (data != NULL) {
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free(data);
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}
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2019-04-23 01:53:11 -07:00
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if (ret >= 0) {
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2017-10-03 06:50:58 -07:00
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exit(0);
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} else {
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2019-12-16 07:04:22 -08:00
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exit(-1);
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2017-10-03 06:50:58 -07:00
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}
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}
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