mirror of https://github.com/PentHertz/srsLTE.git
260 lines
6.5 KiB
C
260 lines
6.5 KiB
C
/**
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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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#include <sys/time.h>
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#include "srslte/srslte.h"
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srslte_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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SRSLTE_SRSLTE_CP_NORM, // cyclic prefix
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SRSLTE_PHICH_SRSLTE_PHICH_R_1_6, // PHICH resources
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SRSLTE_PHICH_NORM // PHICH length
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};
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uint32_t cfi = 2;
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uint32_t tbs = 0;
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uint32_t nof_tbs = 0;
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uint32_t subframe = 1;
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srslte_mod_t modulation = SRSLTE_MOD_BPSK;
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uint32_t rv_idx = 0;
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void usage(char *prog) {
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printf("Usage: %s [Lcpsrnfvmt] -l TBS \n", prog);
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printf("\t-L number of consequent TBS [Default 0]\n");
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printf("\t-m modulation (1: BPSK, 2: QPSK, 3: QAM16, 4: QAM64) [Default BPSK]\n");
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printf("\t-c cell id [Default %d]\n", cell.id);
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printf("\t-s subframe [Default %d]\n", subframe);
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printf("\t-r rv_idx [Default %d]\n", rv_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-v [set srslte_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, "lLcpnfvmtsr")) != -1) {
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switch(opt) {
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case 'm':
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switch(atoi(argv[optind])) {
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case 1:
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modulation = SRSLTE_MOD_BPSK;
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break;
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case 2:
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modulation = SRSLTE_MOD_QPSK;
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break;
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case 4:
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modulation = SRSLTE_MOD_16QAM;
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break;
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case 6:
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modulation = SRSLTE_MOD_64QAM;
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break;
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default:
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fprintf(stderr, "Invalid modulation %d. Possible values: "
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"(1: BPSK, 2: QPSK, 3: QAM16, 4: QAM64)\n", atoi(argv[optind]));
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break;
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}
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break;
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case 's':
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subframe = atoi(argv[optind]);
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break;
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case 'r':
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rv_idx = atoi(argv[optind]);
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break;
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case 'l':
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tbs = atoi(argv[optind]);
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break;
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case 'L':
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nof_tbs = atoi(argv[optind]);
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break;
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case 'p':
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cell.nof_ports = atoi(argv[optind]);
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break;
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case 'n':
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cell.nof_prb = atoi(argv[optind]);
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break;
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case 'c':
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cell.id = atoi(argv[optind]);
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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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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 (tbs == 0) {
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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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int main(int argc, char **argv) {
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srslte_pdsch_t pdsch;
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uint32_t i, j;
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uint8_t *data = NULL;
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cf_t *ce[SRSLTE_MAX_PORTS];
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uint32_t nof_re;
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cf_t *slot_symbols[SRSLTE_MAX_PORTS];
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int ret = -1;
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struct timeval t[3];
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srslte_ra_mcs_t mcs;
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srslte_ra_dl_alloc_t prb_alloc;
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srslte_harq_t harq_process;
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uint32_t rv;
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parse_args(argc,argv);
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bzero(&pdsch, sizeof(srslte_pdsch_t));
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bzero(&harq_process, sizeof(srslte_harq_t));
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bzero(ce, sizeof(cf_t*)*SRSLTE_MAX_PORTS);
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bzero(slot_symbols, sizeof(cf_t*)*SRSLTE_MAX_PORTS);
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nof_re = 2 * SRSLTE_SRSLTE_SRSLTE_CP_NORM_NSYMB * cell.nof_prb * SRSLTE_NRE;
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mcs.mod = modulation;
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prb_alloc.slot[0].nof_prb = cell.nof_prb;
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for (i=0;i<prb_alloc.slot[0].nof_prb;i++) {
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prb_alloc.slot[0].prb_idx[i] = true;
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}
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memcpy(&prb_alloc.slot[1], &prb_alloc.slot[0], sizeof(srslte_ra_prb_slot_t));
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srslte_ra_dl_alloc_re(&prb_alloc, cell.nof_prb, cell.nof_ports, cell.nof_prb<10?(cfi+1):cfi, cell.cp);
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/* init memory */
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for (i=0;i<cell.nof_ports;i++) {
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ce[i] = malloc(sizeof(cf_t) * nof_re);
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if (!ce[i]) {
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perror("malloc");
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goto quit;
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}
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for (j=0;j<nof_re;j++) {
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ce[i][j] = 1;
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}
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slot_symbols[i] = calloc(sizeof(cf_t) , nof_re);
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if (!slot_symbols[i]) {
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perror("malloc");
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goto quit;
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}
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}
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data = malloc(sizeof(uint8_t) * (tbs+nof_tbs));
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if (!data) {
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perror("malloc");
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goto quit;
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}
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if (srslte_pdsch_init(&pdsch, cell)) {
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fprintf(stderr, "Error creating PDSCH object\n");
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goto quit;
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}
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srslte_pdsch_set_rnti(&pdsch, 1234);
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if (srslte_harq_init(&harq_process, cell)) {
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fprintf(stderr, "Error initiating HARQ process\n");
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goto quit;
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}
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for (mcs.tbs = tbs;mcs.tbs<=tbs+nof_tbs;mcs.tbs++) {
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if (SRSLTE_VERBOSE_ISNONE()) {
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printf("Decoding TBS: %d\r",mcs.tbs);
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}
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for (i=0;i<mcs.tbs;i++) {
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data[i] = rand()%2;
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}
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for (rv=0;rv<=rv_idx;rv++) {
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if (srslte_harq_setup_dl(&harq_process, mcs, rv, subframe, &prb_alloc)) {
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fprintf(stderr, "Error configuring HARQ process\n");
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goto quit;
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}
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if (srslte_pdsch_encode(&pdsch, &harq_process, data, slot_symbols)) {
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fprintf(stderr, "Error encoding PDSCH\n");
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goto quit;
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}
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/* combine outputs */
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for (i=0;i<cell.nof_ports;i++) {
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for (j=0;j<nof_re;j++) {
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if (i > 0) {
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slot_symbols[0][j] += slot_symbols[i][j];
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}
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ce[i][j] = 1;
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}
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}
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gettimeofday(&t[1], NULL);
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int r = srslte_pdsch_decode(&pdsch, &harq_process, slot_symbols[0], ce, 0, data);
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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if (r) {
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printf("Error decoding TBS: %d\n", mcs.tbs);
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ret = -1;
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goto quit;
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} else {
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if (nof_tbs == 0) {
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printf("DECODED OK in %d:%d (%.2f Mbps)\n", (int) t[0].tv_sec, (int) t[0].tv_usec, (float) mcs.tbs/t[0].tv_usec);
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}
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}
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}
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}
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ret = 0;
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quit:
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srslte_pdsch_free(&pdsch);
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srslte_harq_free(&harq_process);
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for (i=0;i<cell.nof_ports;i++) {
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if (ce[i]) {
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free(ce[i]);
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}
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if (slot_symbols[i]) {
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free(slot_symbols[i]);
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}
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}
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if (data) {
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free(data);
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}
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if (ret) {
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printf("Error\n");
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} else {
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printf("Ok\n");
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}
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exit(ret);
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}
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