mirror of https://github.com/PentHertz/srsLTE.git
Added DFT transform precoding
This commit is contained in:
ismagom
parent
48278aca84
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daae1da8bc
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@ -0,0 +1,64 @@
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/**
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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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#ifndef DFTPREC_
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#define DFTPREC_
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#include "liblte/config.h"
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#include "liblte/phy/common/phy_common.h"
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#include "liblte/phy/utils/dft.h"
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typedef _Complex float cf_t;
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/* DFT-based Transform Precoding object */
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typedef struct LIBLTE_API {
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uint32_t max_prb;
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dft_plan_t dft_plan[MAX_PRB];
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dft_plan_t idft_plan[MAX_PRB];
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}dft_precoding_t;
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LIBLTE_API int dft_precoding_init(dft_precoding_t *q,
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uint32_t max_prb);
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LIBLTE_API void dft_precoding_free(dft_precoding_t *q);
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LIBLTE_API int dft_precoding(dft_precoding_t *q,
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cf_t *input,
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cf_t *output,
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uint32_t nof_prb,
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uint32_t nof_symbols);
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LIBLTE_API int dft_predecoding(dft_precoding_t *q,
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cf_t *input,
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cf_t *output,
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uint32_t nof_prb,
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uint32_t nof_symbols);
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#endif
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@ -0,0 +1,116 @@
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/**
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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 <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <math.h>
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#include "liblte/phy/common/phy_common.h"
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#include "liblte/phy/utils/debug.h"
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#include "liblte/phy/utils/vector.h"
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#include "liblte/phy/utils/dft.h"
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#include "liblte/phy/filter/dft_precoding.h"
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/* Create DFT plans for transform precoding */
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int dft_precoding_init(dft_precoding_t *q, uint32_t max_prb)
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{
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int ret = LIBLTE_ERROR_INVALID_INPUTS;
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bzero(q, sizeof(dft_precoding_t));
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if (max_prb >= MAX_PRB) {
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ret = LIBLTE_ERROR;
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for (uint32_t i=0;i<max_prb;i++) {
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if((i % 2) == 0 || (i % 3) == 0 || (i % 5) == 0) {
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if (dft_plan_c(&q->dft_plan[i], i*RE_X_RB, FORWARD)) {
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fprintf(stderr, "Error: Creating DFT plan %d\n",i);
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goto clean_exit;
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}
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if (dft_plan_c(&q->idft_plan[i], i*RE_X_RB, BACKWARD)) {
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fprintf(stderr, "Error: Creating DFT plan %d\n",i);
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goto clean_exit;
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}
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}
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}
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q->max_prb = max_prb;
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ret = LIBLTE_SUCCESS;
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}
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clean_exit:
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if (ret == LIBLTE_ERROR) {
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dft_precoding_free(q);
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}
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return ret;
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}
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/* Free DFT plans for transform precoding */
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void dft_precoding_free(dft_precoding_t *q)
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{
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for (uint32_t i=0;i<q->max_prb;i++) {
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if((i % 2) == 0 || (i % 3) == 0 || (i % 5) == 0) {
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dft_plan_free(&q->dft_plan[i]);
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dft_plan_free(&q->idft_plan[i]);
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}
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}
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bzero(q, sizeof(dft_precoding_t));
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}
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int dft_precoding(dft_precoding_t *q, cf_t *input, cf_t *output,
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uint32_t nof_prb, uint32_t nof_symbols)
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{
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if ((nof_prb%2) || (nof_prb%3) || (nof_prb%5)) {
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fprintf(stderr, "Error invalid number of PRB (%d)\n", nof_prb);
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return LIBLTE_ERROR;
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}
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for (uint32_t i=0;i<nof_symbols;i++) {
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dft_run_c(&q->dft_plan[nof_prb], &input[i*RE_X_RB*nof_prb], &output[i*RE_X_RB*nof_prb]);
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}
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return LIBLTE_SUCCESS;
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}
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int dft_predecoding(dft_precoding_t *q, cf_t *input, cf_t *output,
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uint32_t nof_prb, uint32_t nof_symbols)
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{
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if ((nof_prb%2) || (nof_prb%3) || (nof_prb%5)) {
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fprintf(stderr, "Error invalid number of PRB (%d)\n", nof_prb);
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return LIBLTE_ERROR;
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}
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for (uint32_t i=0;i<nof_symbols;i++) {
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dft_run_c(&q->dft_plan[nof_prb], &input[i*RE_X_RB*nof_prb], &output[i*RE_X_RB*nof_prb]);
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}
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return LIBLTE_SUCCESS;
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}
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@ -0,0 +1,197 @@
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/**
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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 "liblte/phy/phy.h"
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#include "liblte/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 UECFG prhs[0]
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#define PUSCHCFG prhs[1]
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#define TRBLKIN prhs[2]
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#define CQI prhs[3]
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#define RI prhs[4]
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#define ACK prhs[5]
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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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("sym=liblte_pusch_encode(ue, chs, trblkin, cqi, ri, ack)\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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int i;
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lte_cell_t cell;
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pusch_t pusch;
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uint32_t sf_idx;
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uint8_t *trblkin = NULL;
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cf_t *sf_symbols = NULL;
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ra_mcs_t mcs;
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ra_prb_t prb_alloc;
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harq_t harq_process;
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uint32_t rv;
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uint32_t rnti32;
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uci_data_t uci_data;
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bzero(&uci_data, sizeof(uci_data_t));
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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_uint32_struct(UECFG, "NCellID", &cell.id)) {
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mexErrMsgTxt("Field NCellID not found in pusch config\n");
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return;
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}
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if (mexutils_read_uint32_struct(UECFG, "NSubframe", &sf_idx)) {
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mexErrMsgTxt("Field NCellID not found in pusch config\n");
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return;
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}
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if (mexutils_read_uint32_struct(UECFG, "RNTI", &rnti32)) {
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mexErrMsgTxt("Field RNTI not found in pusch config\n");
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return;
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}
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char *mod_str = mexutils_get_char_struct(PUSCHCFG, "Modulation");
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if (!strcmp(mod_str, "QPSK")) {
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mcs.mod = LTE_QPSK;
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} else if (!strcmp(mod_str, "16QAM")) {
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mcs.mod = LTE_QAM16;
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} else if (!strcmp(mod_str, "64QAM")) {
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mcs.mod = LTE_QAM64;
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} else {
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mexErrMsgTxt("Unknown modulation\n");
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return;
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}
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mxFree(mod_str);
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float *prbset = NULL;
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mxArray *p;
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p = mxGetField(PUSCHCFG, 0, "PRBSet");
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if (!p) {
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mexErrMsgTxt("Error field PRBSet not found\n");
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return;
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}
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// Only localized PRB supported
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prb_alloc.slot[0].nof_prb = mexutils_read_f(p, &prbset);
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for (i=0;i<cell.nof_prb;i++) {
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prb_alloc.slot[0].prb_idx[i] = false;
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for (int j=0;j<prb_alloc.slot[0].nof_prb && !prb_alloc.slot[0].prb_idx[i];j++) {
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if ((int) prbset[j] == i) {
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prb_alloc.slot[0].prb_idx[i] = true;
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}
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}
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}
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memcpy(&prb_alloc.slot[1], &prb_alloc.slot[0], sizeof(ra_prb_slot_t));
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free(prbset);
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if (pusch_init(&pusch, cell)) {
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mexErrMsgTxt("Error initiating PDSCH\n");
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return;
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}
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pusch_set_rnti(&pusch, (uint16_t) (rnti32 & 0xffff));
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if (harq_init(&harq_process, cell)) {
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mexErrMsgTxt("Error initiating HARQ process\n");
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return;
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}
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mcs.tbs = mexutils_read_uint8(TRBLKIN, &trblkin);
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uci_data.uci_cqi_len = mexutils_read_uint8(CQI, &uci_data.uci_cqi);
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uint8_t *tmp;
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uci_data.uci_ri_len = mexutils_read_uint8(RI, &tmp);
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if (uci_data.uci_ri_len > 0) {
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uci_data.uci_ri = *tmp;
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}
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free(tmp);
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uci_data.uci_ack_len = mexutils_read_uint8(ACK, &tmp);
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if (uci_data.uci_ack_len > 0) {
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uci_data.uci_ack = *tmp;
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}
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free(tmp);
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mexPrintf("TRBL_len: %d, CQI_len: %d, ACK_len: %d, RI_len: %d\n", mcs.tbs,
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uci_data.uci_cqi_len, uci_data.uci_ack_len, uci_data.uci_ri_len);
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if (mexutils_read_uint32_struct(PUSCHCFG, "RV", &rv)) {
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mexErrMsgTxt("Field RV not found in pdsch config\n");
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return;
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}
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if (mexutils_read_float_struct(PUSCHCFG, "BetaCQI", &uci_data.beta_cqi)) {
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uci_data.beta_cqi = 2.0;
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}
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if (mexutils_read_float_struct(PUSCHCFG, "BetaRI", &uci_data.beta_ri)) {
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uci_data.beta_ri = 2.0;
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}
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if (mexutils_read_float_struct(PUSCHCFG, "BetaACK", &uci_data.beta_ack)) {
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uci_data.beta_ack = 2.0;
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}
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mexPrintf("Beta_CQI: %.1f, Beta_ACK: %.1f, Beta_RI: %.1f\n",
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uci_data.beta_cqi, uci_data.beta_ack, uci_data.beta_ri);
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sf_symbols = vec_malloc(sizeof(cf_t) * harq_process.nof_re);
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if (!sf_symbols) {
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mexErrMsgTxt("malloc");
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return;
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}
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if (harq_setup_ul(&harq_process, mcs, rv, sf_idx, &prb_alloc)) {
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mexErrMsgTxt("Error configuring HARQ process\n");
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return;
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}
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int r = pusch_uci_encode(&pusch, &harq_process, trblkin, uci_data, sf_symbols);
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if (r < 0) {
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mexErrMsgTxt("Error encoding PUSCH\n");
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return;
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}
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if (nlhs >= 1) {
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mexutils_write_cf(sf_symbols, &plhs[0], harq_process.nof_re, 1);
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}
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pusch_free(&pusch);
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free(trblkin);
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free(uci_data.uci_cqi);
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free(sf_symbols);
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return;
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}
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@ -0,0 +1,9 @@
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fprintf('static uint8_t M_basis_seq_pucch[20][13]={\n');
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for i=1:20
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fprintf('\t\t{');
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for j=1:12
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fprintf('%d, ',y(i,j));
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end
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fprintf('%d},\n',y(i,13));
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end
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fprintf('\t\t};\n');
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