mirror of https://github.com/PentHertz/srsLTE.git
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 The srsLTE 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 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 channel estimator
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*/
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#define INPUT prhs[0]
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#define NOF_INPUTS 1
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void help()
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{
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mexErrMsgTxt
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("[decoded_bits] = srslte_viterbi(input_llr, type)\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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srslte_viterbi_t viterbi;
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float *input_llr;
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uint8_t *output_data;
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int nof_bits;
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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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nof_bits = mexutils_read_f(INPUT, &input_llr);
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output_data = srslte_vec_malloc(nof_bits * sizeof(uint8_t));
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uint32_t poly[3] = { 0x6D, 0x4F, 0x57 };
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if (srslte_viterbi_init(&viterbi, SRSLTE_VITERBI_37, poly, nof_bits/3, true)) {
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return;
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}
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if (nrhs >= 2) {
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float gain_quant = mxGetScalar(prhs[1]);
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srslte_viterbi_set_gain_quant(&viterbi, gain_quant);
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}
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srslte_viterbi_decode_f(&viterbi, input_llr, output_data, nof_bits/3);
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if (nlhs >= 1) {
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mexutils_write_uint8(output_data, &plhs[0], nof_bits/3, 1);
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}
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if (nlhs >= 2) {
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mexutils_write_uint8(viterbi.symbols_uc, &plhs[1], nof_bits/3, 1);
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}
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srslte_viterbi_free(&viterbi);
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free(input_llr);
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free(output_data);
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return;
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}
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