mirror of https://github.com/pvnis/srsRAN_4G.git
Merge branch 'improve_cfo'
commit
db1ceae5e3
@ -0,0 +1,55 @@
|
|||||||
|
/**
|
||||||
|
*
|
||||||
|
* \section COPYRIGHT
|
||||||
|
*
|
||||||
|
* Copyright 2013-2015 The srsLTE Developers. See the
|
||||||
|
* COPYRIGHT file at the top-level directory of this distribution.
|
||||||
|
*
|
||||||
|
* \section LICENSE
|
||||||
|
*
|
||||||
|
* This file is part of the srsLTE library.
|
||||||
|
*
|
||||||
|
* srsLTE is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU Affero General Public License as
|
||||||
|
* published by the Free Software Foundation, either version 3 of
|
||||||
|
* the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* srsLTE 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 Affero General Public License for more details.
|
||||||
|
*
|
||||||
|
* A copy of the GNU Affero 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/.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef CP_
|
||||||
|
#define CP_
|
||||||
|
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <complex.h>
|
||||||
|
|
||||||
|
#include "srslte/config.h"
|
||||||
|
|
||||||
|
typedef struct {
|
||||||
|
cf_t *corr;
|
||||||
|
uint32_t symbol_sz;
|
||||||
|
} srslte_cp_synch_t;
|
||||||
|
|
||||||
|
SRSLTE_API int srslte_cp_synch_init(srslte_cp_synch_t *q,
|
||||||
|
uint32_t symbol_sz);
|
||||||
|
|
||||||
|
SRSLTE_API void srslte_cp_synch_free(srslte_cp_synch_t *q);
|
||||||
|
|
||||||
|
SRSLTE_API uint32_t srslte_cp_synch(srslte_cp_synch_t *q,
|
||||||
|
cf_t *input,
|
||||||
|
uint32_t max_offset,
|
||||||
|
uint32_t nof_symbols,
|
||||||
|
uint32_t cp_len);
|
||||||
|
|
||||||
|
SRSLTE_API cf_t srslte_cp_synch_corr_output(srslte_cp_synch_t *q,
|
||||||
|
uint32_t offset);
|
||||||
|
|
||||||
|
#endif // CP_
|
@ -0,0 +1,94 @@
|
|||||||
|
/**
|
||||||
|
*
|
||||||
|
* \section COPYRIGHT
|
||||||
|
*
|
||||||
|
* Copyright 2013-2015 The srsLTE Developers. See the
|
||||||
|
* COPYRIGHT file at the top-level directory of this distribution.
|
||||||
|
*
|
||||||
|
* \section LICENSE
|
||||||
|
*
|
||||||
|
* This file is part of the srsLTE library.
|
||||||
|
*
|
||||||
|
* srsLTE is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU Affero General Public License as
|
||||||
|
* published by the Free Software Foundation, either version 3 of
|
||||||
|
* the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* srsLTE 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 Affero General Public License for more details.
|
||||||
|
*
|
||||||
|
* A copy of the GNU Affero 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 ENBCFG prhs[0]
|
||||||
|
#define INPUT prhs[1]
|
||||||
|
#define NOF_INPUTS 2
|
||||||
|
|
||||||
|
|
||||||
|
void help()
|
||||||
|
{
|
||||||
|
mexErrMsgTxt
|
||||||
|
("[offset,corr] = srslte_cp_synch(enbConfig, inputSignal)\n\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
/* the gateway function */
|
||||||
|
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
|
||||||
|
{
|
||||||
|
|
||||||
|
srslte_cell_t cell;
|
||||||
|
srslte_cp_synch_t cp_synch;
|
||||||
|
cf_t *input_symbols;
|
||||||
|
int frame_len;
|
||||||
|
|
||||||
|
if (nrhs != NOF_INPUTS) {
|
||||||
|
help();
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (mexutils_read_cell(ENBCFG, &cell)) {
|
||||||
|
help();
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Allocate input buffers */
|
||||||
|
frame_len = mexutils_read_cf(INPUT, &input_symbols);
|
||||||
|
if (frame_len < 0) {
|
||||||
|
mexErrMsgTxt("Error reading input symbols\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
uint32_t symbol_sz = srslte_symbol_sz(cell.nof_prb);
|
||||||
|
if (srslte_cp_synch_init(&cp_synch, symbol_sz)) {
|
||||||
|
fprintf(stderr, "Error initiating CP\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
uint32_t cp_len = SRSLTE_CP_LEN_NORM(1, symbol_sz);
|
||||||
|
uint32_t nsymbols = frame_len/(symbol_sz+cp_len)-1;
|
||||||
|
uint32_t peak_idx = srslte_cp_synch(&cp_synch, input_symbols, symbol_sz, nsymbols, cp_len);
|
||||||
|
|
||||||
|
if (nlhs >= 1) {
|
||||||
|
plhs[0] = mxCreateDoubleScalar(peak_idx);
|
||||||
|
}
|
||||||
|
if (nlhs >= 2) {
|
||||||
|
mexutils_write_cf(cp_synch.corr, &plhs[1], symbol_sz, 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
srslte_cp_synch_free(&cp_synch);
|
||||||
|
free(input_symbols);
|
||||||
|
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
Loading…
Reference in New Issue