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129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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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 <string.h>
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#include "srslte/srslte.h"
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#include "srslte/mex/mexutils.h"
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/** MEX function to be called from MATLAB to test the predecoder
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*/
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#define INPUT prhs[0]
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#define NLAYERS prhs[1]
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#define NPORTS prhs[2]
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#define TXSCHEME prhs[3]
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#define NOF_INPUTS 3
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void help()
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{
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mexErrMsgTxt
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("[output] = srslte_decoder(input, NLayers, NCellRefP, TxScheme)\n\n");
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}
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/* the gateway function */
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void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
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{
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cf_t *input = NULL;
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cf_t *output = NULL;
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if (nrhs < NOF_INPUTS) {
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help();
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return;
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}
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// Read input symbols
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int nof_symbols = mexutils_read_cf(INPUT, &input);
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if (nof_symbols < 0) {
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mexErrMsgTxt("Error reading input\n");
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return;
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}
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uint32_t nof_layers = mxGetScalar(NLAYERS);
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uint32_t nof_tx_ports = mxGetScalar(NPORTS);
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uint32_t nof_codewords = 1;
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mexPrintf("nof_tx_ports=%d, nof_layers=%d, nof_symbols=%d\n", nof_tx_ports, nof_layers, nof_symbols);
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cf_t *y[SRSLTE_MAX_PORTS];
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cf_t *x[SRSLTE_MAX_LAYERS];
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cf_t *d[SRSLTE_MAX_CODEWORDS];
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d[0] = input; // Single codeword supported only
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/* Allocate memory */
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for (int i = 0; i < nof_layers; i++) {
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x[i] = srslte_vec_malloc(sizeof(cf_t)*nof_symbols/nof_layers);
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}
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output = srslte_vec_malloc(sizeof(cf_t)*nof_symbols*nof_tx_ports/nof_layers);
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for (int i=0;i<nof_tx_ports;i++) {
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y[i] = &output[i*nof_symbols/nof_layers];
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}
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char *txscheme = "Port0";
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if (nrhs >= NOF_INPUTS) {
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txscheme = mxArrayToString(TXSCHEME);
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}
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srslte_mimo_type_t type = SRSLTE_MIMO_TYPE_SINGLE_ANTENNA;
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if (!strcmp(txscheme, "Port0")) {
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type = SRSLTE_MIMO_TYPE_SINGLE_ANTENNA;
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} else if (!strcmp(txscheme, "TxDiversity")) {
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type = SRSLTE_MIMO_TYPE_TX_DIVERSITY;
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} else if (!strcmp(txscheme, "CDD")) {
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type = SRSLTE_MIMO_TYPE_CDD;
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} else if (!strcmp(txscheme, "SpatialMux")) {
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type = SRSLTE_MIMO_TYPE_SPATIAL_MULTIPLEX;
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} else {
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mexPrintf("Unsupported TxScheme=%s\n", txscheme);
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return;
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}
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int symbols_layers[SRSLTE_MAX_LAYERS];
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for (int i=0;i<nof_layers;i++) {
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symbols_layers[i] = nof_symbols/nof_layers;
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}
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srslte_layermap_type(d, x, nof_codewords, nof_layers, symbols_layers, type);
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srslte_precoding_type(x, y, nof_layers, nof_tx_ports, nof_symbols/nof_layers, type);
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if (nlhs >= 1) {
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mexutils_write_cf(output, &plhs[0], nof_symbols/nof_layers, nof_tx_ports);
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}
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if (input) {
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free(input);
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}
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if (output) {
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free(output);
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}
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for (int i=0;i<nof_layers;i++) {
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if (x[i]) {
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free(x[i]);
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}
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}
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return;
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}
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