mirror of https://github.com/pvnis/srsRAN_4G.git
Improved synch. Fixed some bugs. Added ue_ul
ismagom
10 years ago
parent
99df252279
commit
6fe535f8a4
@ -0,0 +1,114 @@
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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 UEUL_H
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#define UEUL_H
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/*******************************************************
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*
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* This module is a frontend to all the data and control channels processing
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* modules.
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********************************************************/
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#include "liblte/phy/ch_estimation/chest_dl.h"
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#include "liblte/phy/common/fft.h"
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#include "liblte/phy/common/phy_common.h"
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#include "liblte/phy/ch_estimation/refsignal_ul.h"
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#include "liblte/phy/phch/pusch.h"
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#include "liblte/phy/phch/ra.h"
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#include "liblte/phy/sync/cfo.h"
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#include "liblte/phy/utils/vector.h"
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#include "liblte/phy/utils/debug.h"
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#include "liblte/config.h"
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#define NOF_HARQ_PROCESSES 8
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typedef struct LIBLTE_API {
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lte_fft_t fft;
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cfo_t cfo;
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lte_cell_t cell;
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float current_cfo;
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refsignal_drms_pusch_cfg_t pusch_drms_cfg;
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refsignal_ul_t drms;
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harq_t harq_process[NOF_HARQ_PROCESSES];
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pusch_t pusch;
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cf_t *refsignal;
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cf_t *sf_symbols;
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uint16_t current_rnti;
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}ue_ul_t;
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/* This function shall be called just after the initial synchronization */
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LIBLTE_API int ue_ul_init(ue_ul_t *q,
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lte_cell_t cell);
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LIBLTE_API void ue_ul_free(ue_ul_t *q);
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LIBLTE_API void ue_ul_set_cfo(ue_ul_t *q,
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float cur_cfo);
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LIBLTE_API void ue_ul_set_pusch_cfg(ue_ul_t *q,
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refsignal_drms_pusch_cfg_t *pusch_drms_cfg,
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pusch_hopping_cfg_t *pusch_hopping_cfg);
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LIBLTE_API int ue_ul_pusch_encode(ue_ul_t *q,
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ra_pusch_t *ra_ul,
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uint8_t *data,
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cf_t *output_signal);
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LIBLTE_API int ue_ul_pusch_encode_rnti(ue_ul_t *q,
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ra_pusch_t *ra_ul,
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uint8_t *data,
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uint16_t rnti,
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cf_t *output_signal);
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LIBLTE_API int ue_ul_pusch_uci_encode(ue_ul_t *q,
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ra_pusch_t *ra_ul,
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uint8_t *data,
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uci_data_t uci_data,
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cf_t *output_signal);
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LIBLTE_API int ue_ul_pusch_uci_encode_rnti(ue_ul_t *q,
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ra_pusch_t *ra_ul,
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uint8_t *data,
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uci_data_t uci_data,
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uint16_t rnti,
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cf_t *output_signal);
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LIBLTE_API void ue_ul_reset(ue_ul_t *q);
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LIBLTE_API void ue_ul_set_rnti(ue_ul_t *q,
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uint16_t rnti);
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#endif
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@ -0,0 +1,210 @@
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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 "liblte/phy/ue/ue_ul.h"
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#include <complex.h>
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#include <math.h>
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#define CURRENT_FFTSIZE lte_symbol_sz(q->cell.nof_prb)
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#define CURRENT_SFLEN SF_LEN(CURRENT_FFTSIZE, q->cell.cp)
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#define CURRENT_SLOTLEN_RE SLOT_LEN_RE(q->cell.nof_prb, q->cell.cp)
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#define CURRENT_SFLEN_RE SF_LEN_RE(q->cell.nof_prb, q->cell.cp)
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int ue_ul_init(ue_ul_t *q,
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lte_cell_t cell)
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{
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int ret = LIBLTE_ERROR_INVALID_INPUTS;
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if (q != NULL &&
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lte_cell_isvalid(&cell))
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{
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ret = LIBLTE_ERROR;
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bzero(q, sizeof(ue_ul_t));
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q->cell = cell;
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if (lte_fft_init(&q->fft, q->cell.cp, q->cell.nof_prb)) {
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fprintf(stderr, "Error initiating FFT\n");
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goto clean_exit;
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}
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lte_fft_set_freq_shift(&q->fft, 0.5);
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if (cfo_init(&q->cfo, CURRENT_SFLEN)) {
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fprintf(stderr, "Error creating CFO object\n");
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goto clean_exit;
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}
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if (pusch_init(&q->pusch, q->cell)) {
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fprintf(stderr, "Error creating PUSCH object\n");
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goto clean_exit;
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}
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for (uint32_t i=0;i<NOF_HARQ_PROCESSES; i++) {
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if (harq_init(&q->harq_process[i], q->cell)) {
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fprintf(stderr, "Error initiating HARQ process\n");
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goto clean_exit;
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}
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}
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if (refsignal_ul_init(&q->drms, cell)) {
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fprintf(stderr, "Error initiating refsignal_ul\n");
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goto clean_exit;
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}
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q->sf_symbols = vec_malloc(CURRENT_SFLEN_RE * sizeof(cf_t));
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if (!q->sf_symbols) {
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perror("malloc");
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goto clean_exit;
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}
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q->refsignal = vec_malloc(RE_X_RB * q->cell.nof_prb * sizeof(cf_t));
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if (!q->refsignal) {
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perror("malloc");
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goto clean_exit;
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}
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ret = LIBLTE_SUCCESS;
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} else {
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fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
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cell.id, cell.nof_ports, cell.nof_prb);
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}
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clean_exit:
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if (ret == LIBLTE_ERROR) {
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ue_ul_free(q);
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}
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return ret;
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}
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void ue_ul_free(ue_ul_t *q) {
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if (q) {
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lte_fft_free(&q->fft);
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pusch_free(&q->pusch);
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for (uint32_t i=0;i<NOF_HARQ_PROCESSES; i++) {
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harq_free(&q->harq_process[i]);
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}
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cfo_free(&q->cfo);
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refsignal_ul_free(&q>drms);
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if (q->sf_symbols) {
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free(q->sf_symbols);
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}
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if (q->refsignal) {
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free(q->refsignal);
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}
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bzero(q, sizeof(ue_ul_t));
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}
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}
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void ue_ul_set_cfo(ue_ul_t *q, float cur_cfo) {
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q->current_cfo = cur_cfo;
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}
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/* Precalculate the PDSCH scramble sequences for a given RNTI. This function takes a while
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* to execute, so shall be called once the final C-RNTI has been allocated for the session.
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* For the connection procedure, use pusch_encode_rnti() or pusch_decode_rnti() functions
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*/
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void ue_ul_set_rnti(ue_ul_t *q, uint16_t rnti) {
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q->current_rnti = rnti;
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pusch_set_rnti(&q->pusch, rnti);
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}
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void ue_ul_reset(ue_ul_t *q) {
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harq_reset(&q->harq_process[0]);
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}
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void ue_ul_set_pusch_cfg(ue_ul_t *q, refsignal_drms_pusch_cfg_t *pusch_drms_cfg, pusch_hopping_cfg_t *pusch_hopping_cfg)
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{
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pusch_set_hopping_cfg(&q->pusch, pusch_hopping_cfg);
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}
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int ue_ul_pusch_encode(ue_ul_t *q, ra_pusch_t *ra_ul, uint8_t *data, uint32_t sf_idx, cf_t *output_signal)
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{
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uci_data_t uci_data;
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bzero(&uci_data, sizeof(uci_data_t));
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return ue_ul_pusch_uci_encode_rnti(q, ra_ul, data, uci_data, sf_idx, q->current_rnti, output_signal);
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}
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int ue_ul_pusch_encode_rnti(ue_ul_t *q, ra_pusch_t *ra_ul, uint8_t *data, uint16_t rnti, uint32_t sf_idx, cf_t *output_signal)
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{
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uci_data_t uci_data;
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bzero(&uci_data, sizeof(uci_data_t));
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return ue_ul_pusch_uci_encode_rnti(q, ra_ul, data, uci_data, sf_idx, rnti, output_signal);
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}
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int ue_ul_pusch_uci_encode(ue_ul_t *q, ra_pusch_t *ra_ul, uint8_t *data, uci_data_t uci_data, uint32_t sf_idx, cf_t *output_signal)
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{
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return ue_ul_pusch_uci_encode_rnti(q, ra_ul, data, uci_data, sf_idx, q->current_rnti, output_signal);
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}
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int ue_ul_pusch_uci_encode_rnti(ue_ul_t *q, ra_pusch_t *ra_ul, uint8_t *data, uci_data_t uci_data,
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uint32_t sf_idx, uint16_t rnti,
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cf_t *output_signal)
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{
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int ret = LIBLTE_ERROR_INVALID_INPUTS;
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if (q != NULL &&
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ra_ul != NULL &&
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data != NULL &&
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output_signal != NULL)
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{
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if (ra_ul->prb_alloc.L_prb == 0) {
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fprintf(stderr, "Invalid UL PRB allocation (L_prb=0)\n" ;
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return ret;
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}
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}
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ret = LIBLTE_ERROR;
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if (harq_setup_ul(&q->harq_process[0], ra_ul->mcs, ra_ul->rv_idx, sf_idx, &ra_ul->prb_alloc)) {
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fprintf(stderr, "Error configuring HARQ process\n");
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return ret;
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}
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if (pusch_encode_rnti(&q->pusch, &q->harq_process[0], data, rnti, q->sf_symbols)) {
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fprintf(stderr, "Error encoding TB\n");
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return ret;
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}
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q->pusch_drms_cfg.nof_prb = ra_ul->prb_alloc.L_prb;
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for (uint32_t i=0;i<2;i++) {
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// FIXME: Pregenerate for all possible number of prb
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if (refsignal_dmrs_pusch_gen(&q->drms, &q->pusch_drms_cfg, 2*sf_idx+i, q->refsignal)) {
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fprintf(stderr, "Error generating PUSCH DRMS signals\n");
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return ret;
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}
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refsignal_drms_pusch_put(&q->drms, &q->pusch_drms_cfg, q->refsignal, i,
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ra_ul->prb_alloc.n_prb_tilde[i], q->sf_symbols);
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}
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lte_ifft_run_sf(&q->fft, q->sf_symbols, output_signal);
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cfo_correct(&q->cfo, output_signal, output_signal, q->current_cfo / lte_symbol_sz(q->cell.nof_prb));
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ret = LIBLTE_SUCCESS;
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}
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