mirror of https://github.com/PentHertz/srsLTE.git
226 lines
6.4 KiB
C
226 lines
6.4 KiB
C
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2014 The libLTE Developers. See the
|
|
* COPYRIGHT file at the top-level directory of this distribution.
|
|
*
|
|
* \section LICENSE
|
|
*
|
|
* This file is part of the libLTE library.
|
|
*
|
|
* libLTE 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.
|
|
*
|
|
* libLTE 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 <string.h>
|
|
#include "srslte/srslte.h"
|
|
#include "srslte/mex/mexutils.h"
|
|
|
|
/** MEX function to be called from MATLAB to test the channel estimator
|
|
*/
|
|
|
|
#define UECFG prhs[0]
|
|
#define PUSCHCFG prhs[1]
|
|
#define TRBLKIN prhs[2]
|
|
#define CQI prhs[3]
|
|
#define RI prhs[4]
|
|
#define ACK prhs[5]
|
|
#define NOF_INPUTS 6
|
|
|
|
void help()
|
|
{
|
|
mexErrMsgTxt
|
|
("sym=srslte_pusch_encode(ue, chs, trblkin, cqi, ri, ack)\n\n");
|
|
}
|
|
|
|
/* the gateway function */
|
|
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
|
|
{
|
|
|
|
if (nrhs != NOF_INPUTS) {
|
|
help();
|
|
return;
|
|
}
|
|
|
|
srslte_cell_t cell;
|
|
bzero(&cell, sizeof(srslte_cell_t));
|
|
cell.nof_ports = 1;
|
|
if (mexutils_read_uint32_struct(UECFG, "NCellID", &cell.id)) {
|
|
mexErrMsgTxt("Field NCellID not found in UE config\n");
|
|
return;
|
|
}
|
|
if (mexutils_read_uint32_struct(UECFG, "NULRB", &cell.nof_prb)) {
|
|
mexErrMsgTxt("Field NULRB not found in UE config\n");
|
|
return;
|
|
}
|
|
pusch_t pusch;
|
|
if (pusch_init(&pusch, cell)) {
|
|
mexErrMsgTxt("Error initiating PUSCH\n");
|
|
return;
|
|
}
|
|
uint32_t rnti32=0;
|
|
if (mexutils_read_uint32_struct(UECFG, "RNTI", &rnti32)) {
|
|
mexErrMsgTxt("Field RNTI not found in pusch config\n");
|
|
return;
|
|
}
|
|
pusch_set_rnti(&pusch, (uint16_t) (rnti32 & 0xffff));
|
|
|
|
|
|
|
|
|
|
uint32_t sf_idx=0;
|
|
if (mexutils_read_uint32_struct(UECFG, "NSubframe", &sf_idx)) {
|
|
mexErrMsgTxt("Field NSubframe not found in UE config\n");
|
|
return;
|
|
}
|
|
ra_mcs_t mcs;
|
|
char *mod_str = mexutils_get_char_struct(PUSCHCFG, "Modulation");
|
|
if (!strcmp(mod_str, "QPSK")) {
|
|
mcs.mod = LTE_QPSK;
|
|
} else if (!strcmp(mod_str, "16QAM")) {
|
|
mcs.mod = LTE_QAM16;
|
|
} else if (!strcmp(mod_str, "64QAM")) {
|
|
mcs.mod = LTE_QAM64;
|
|
} else {
|
|
mexErrMsgTxt("Unknown modulation\n");
|
|
return;
|
|
}
|
|
|
|
mxFree(mod_str);
|
|
|
|
float *prbset = NULL;
|
|
mxArray *p;
|
|
p = mxGetField(PUSCHCFG, 0, "PRBSet");
|
|
if (!p) {
|
|
mexErrMsgTxt("Error field PRBSet not found\n");
|
|
return;
|
|
}
|
|
|
|
ra_ul_alloc_t prb_alloc;
|
|
bzero(&prb_alloc, sizeof(ra_ul_alloc_t));
|
|
prb_alloc.L_prb = mexutils_read_f(p, &prbset);
|
|
prb_alloc.n_prb[0] = prbset[0];
|
|
prb_alloc.n_prb[1] = prbset[0];
|
|
free(prbset);
|
|
|
|
mexPrintf("L_prb: %d, n_prb: %d\n", prb_alloc.L_prb, prb_alloc.n_prb[2*sf_idx]);
|
|
|
|
uint8_t *trblkin = NULL;
|
|
mcs.tbs = mexutils_read_uint8(TRBLKIN, &trblkin);
|
|
|
|
harq_t harq_process;
|
|
if (harq_init(&harq_process, cell)) {
|
|
mexErrMsgTxt("Error initiating HARQ process\n");
|
|
return;
|
|
}
|
|
if (harq_setup_ul(&harq_process, mcs, 0, sf_idx, &prb_alloc)) {
|
|
mexErrMsgTxt("Error configuring HARQ process\n");
|
|
return;
|
|
}
|
|
|
|
uint32_t nof_re = SRSLTE_NRE*cell.nof_prb*2*SRSLTE_CP_NSYMB(cell.cp);
|
|
cf_t *sf_symbols = vec_malloc(sizeof(cf_t) * nof_re);
|
|
if (!sf_symbols) {
|
|
mexErrMsgTxt("malloc");
|
|
return;
|
|
}
|
|
bzero(sf_symbols, sizeof(cf_t) * nof_re);
|
|
|
|
|
|
uci_data_t uci_data;
|
|
bzero(&uci_data, sizeof(uci_data_t));
|
|
uci_data.uci_cqi_len = mexutils_read_uint8(CQI, &uci_data.uci_cqi);
|
|
uint8_t *tmp;
|
|
uci_data.uci_ri_len = mexutils_read_uint8(RI, &tmp);
|
|
if (uci_data.uci_ri_len > 0) {
|
|
uci_data.uci_ri = *tmp;
|
|
}
|
|
free(tmp);
|
|
uci_data.uci_ack_len = mexutils_read_uint8(ACK, &tmp);
|
|
if (uci_data.uci_ack_len > 0) {
|
|
uci_data.uci_ack = *tmp;
|
|
}
|
|
free(tmp);
|
|
|
|
|
|
if (mexutils_read_float_struct(PUSCHCFG, "BetaCQI", &uci_data.beta_cqi)) {
|
|
uci_data.beta_cqi = 2.0;
|
|
}
|
|
if (mexutils_read_float_struct(PUSCHCFG, "BetaRI", &uci_data.beta_ri)) {
|
|
uci_data.beta_ri = 2.0;
|
|
}
|
|
if (mexutils_read_float_struct(PUSCHCFG, "BetaACK", &uci_data.beta_ack)) {
|
|
uci_data.beta_ack = 2.0;
|
|
}
|
|
mexPrintf("Beta_CQI: %.1f, Beta_ACK: %.1f, Beta_RI: %.1f\n",
|
|
uci_data.beta_cqi, uci_data.beta_ack, uci_data.beta_ri);
|
|
mexPrintf("TRBL_len: %d, CQI_len: %d, ACK_len: %d (%d), RI_len: %d (%d)\n", mcs.tbs,
|
|
uci_data.uci_cqi_len, uci_data.uci_ack_len, uci_data.uci_ack, uci_data.uci_ri_len, uci_data.uci_ri);
|
|
|
|
|
|
mexPrintf("NofRE: %d, NofBits: %d, TBS: %d\n", harq_process.nof_re, harq_process.nof_bits, harq_process.mcs.tbs);
|
|
int r = pusch_uci_encode(&pusch, &harq_process, trblkin, uci_data, sf_symbols);
|
|
if (r < 0) {
|
|
mexErrMsgTxt("Error encoding PUSCH\n");
|
|
return;
|
|
}
|
|
uint32_t rv=0;
|
|
if (mexutils_read_uint32_struct(PUSCHCFG, "RV", &rv)) {
|
|
mexErrMsgTxt("Field RV not found in pdsch config\n");
|
|
return;
|
|
}
|
|
if (rv > 0) {
|
|
if (harq_setup_ul(&harq_process, mcs, rv, sf_idx, &prb_alloc)) {
|
|
mexErrMsgTxt("Error configuring HARQ process\n");
|
|
return;
|
|
}
|
|
r = pusch_uci_encode(&pusch, &harq_process, trblkin, uci_data, sf_symbols);
|
|
if (r < 0) {
|
|
mexErrMsgTxt("Error encoding PUSCH\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
cf_t *scfdma = vec_malloc(sizeof(cf_t) * SRSLTE_SF_LEN_PRB(cell.nof_prb));
|
|
bzero(scfdma, sizeof(cf_t) * SRSLTE_SF_LEN_PRB(cell.nof_prb));
|
|
srslte_fft_t fft;
|
|
lte_ifft_init(&fft, SRSLTE_SRSLTE_CP_NORM, cell.nof_prb);
|
|
srslte_fft_set_normalize(&fft, true);
|
|
srslte_fft_set_freq_shift(&fft, 0.5);
|
|
lte_ifft_run_sf(&fft, sf_symbols, scfdma);
|
|
|
|
// Matlab toolbox expects further normalization
|
|
vec_sc_prod_cfc(scfdma, 1.0/sqrtf(srslte_symbol_sz(cell.nof_prb)), scfdma, SRSLTE_SF_LEN_PRB(cell.nof_prb));
|
|
|
|
if (nlhs >= 1) {
|
|
mexutils_write_cf(scfdma, &plhs[0], SRSLTE_SF_LEN_PRB(cell.nof_prb), 1);
|
|
}
|
|
if (nlhs >= 2) {
|
|
mexutils_write_cf(sf_symbols, &plhs[1], nof_re, 1);
|
|
}
|
|
if (nlhs >= 3) {
|
|
mexutils_write_cf(pusch.pusch_z, &plhs[2], harq_process.nof_re, 1);
|
|
}
|
|
pusch_free(&pusch);
|
|
free(trblkin);
|
|
free(uci_data.uci_cqi);
|
|
free(sf_symbols);
|
|
free(scfdma);
|
|
|
|
return;
|
|
}
|
|
|