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96 lines
2.3 KiB
C
96 lines
2.3 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 <string.h>
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#include "srslte/phy/phy.h"
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#include "srslte/mex/mexutils.h"
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/** MEX function to be called from MATLAB to test the channel estimator
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*/
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#define ENBCFG prhs[0]
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#define INPUT prhs[1]
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#define NOF_INPUTS 2
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void help()
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{
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mexErrMsgTxt
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("[offset,corr] = srslte_pss(enbConfig, inputSignal)\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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lte_cell_t cell;
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pss_synch_t pss;
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cf_t *input_symbols;
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int frame_len;
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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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if (mexutils_read_cell(ENBCFG, &cell)) {
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help();
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return;
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}
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/** Allocate input buffers */
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frame_len = mexutils_read_cf(INPUT, &input_symbols);
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if (frame_len < 0) {
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mexErrMsgTxt("Error reading input symbols\n");
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return;
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}
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if (pss_synch_init_fft(&pss, frame_len, lte_symbol_sz(cell.nof_prb))) {
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fprintf(stderr, "Error initiating PSS\n");
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exit(-1);
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}
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if (pss_synch_set_N_id_2(&pss, cell.id%2)) {
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fprintf(stderr, "Error setting N_id_2=%d\n",cell.id%2);
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exit(-1);
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}
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int peak_idx = pss_synch_find_pss(&pss, input_symbols, NULL);
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if (nlhs >= 1) {
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plhs[0] = mxCreateLogicalScalar(peak_idx);
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}
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if (nlhs >= 2) {
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mexutils_write_cf(pss.conv_output, &plhs[1], frame_len, 1);
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}
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pss_synch_free(&pss);
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free(input_symbols);
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return;
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}
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