mirror of https://github.com/PentHertz/srsLTE.git
126 lines
4.6 KiB
C
126 lines
4.6 KiB
C
/**
|
|
* Copyright 2013-2022 Software Radio Systems Limited
|
|
*
|
|
* This file is part of srsRAN.
|
|
*
|
|
* srsRAN 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.
|
|
*
|
|
* srsRAN 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/.
|
|
*
|
|
*/
|
|
|
|
/**********************************************************************************************
|
|
* File: chest_ul.h
|
|
*
|
|
* Description: 3GPP LTE Uplink channel estimator and equalizer.
|
|
* Estimates the channel in the resource elements transmitting references and
|
|
* interpolates for the rest of the resource grid.
|
|
* The equalizer uses the channel estimates to produce an estimation of the
|
|
* transmitted symbol.
|
|
*
|
|
* Reference:
|
|
*********************************************************************************************/
|
|
|
|
#ifndef SRSRAN_CHEST_UL_H
|
|
#define SRSRAN_CHEST_UL_H
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "srsran/config.h"
|
|
|
|
#include "srsran/phy/ch_estimation/chest_common.h"
|
|
#include "srsran/phy/ch_estimation/refsignal_ul.h"
|
|
#include "srsran/phy/common/phy_common.h"
|
|
#include "srsran/phy/phch/pucch_cfg.h"
|
|
#include "srsran/phy/phch/pusch_cfg.h"
|
|
#include "srsran/phy/resampling/interp.h"
|
|
|
|
typedef struct SRSRAN_API {
|
|
cf_t* ce;
|
|
uint32_t nof_re;
|
|
float noise_estimate;
|
|
float noise_estimate_dbFs;
|
|
float rsrp;
|
|
float rsrp_dBfs;
|
|
float epre;
|
|
float epre_dBfs;
|
|
float snr;
|
|
float snr_db;
|
|
float cfo_hz;
|
|
float ta_us;
|
|
} srsran_chest_ul_res_t;
|
|
|
|
typedef struct {
|
|
srsran_cell_t cell;
|
|
|
|
srsran_refsignal_ul_t dmrs_signal;
|
|
srsran_refsignal_ul_dmrs_pregen_t dmrs_pregen;
|
|
bool dmrs_signal_configured;
|
|
|
|
srsran_refsignal_srs_pregen_t srs_pregen;
|
|
bool srs_signal_configured;
|
|
|
|
cf_t* pilot_estimates;
|
|
cf_t* pilot_estimates_tmp[4];
|
|
cf_t* pilot_recv_signal;
|
|
cf_t* pilot_known_signal;
|
|
cf_t* tmp_noise;
|
|
|
|
#ifdef FREQ_SEL_SNR
|
|
float snr_vector[12000];
|
|
float pilot_power[12000];
|
|
#endif
|
|
uint32_t smooth_filter_len;
|
|
float smooth_filter[SRSRAN_CHEST_MAX_SMOOTH_FIL_LEN];
|
|
|
|
srsran_interp_linsrsran_vec_t srsran_interp_linvec;
|
|
|
|
} srsran_chest_ul_t;
|
|
|
|
SRSRAN_API int srsran_chest_ul_init(srsran_chest_ul_t* q, uint32_t max_prb);
|
|
|
|
SRSRAN_API void srsran_chest_ul_free(srsran_chest_ul_t* q);
|
|
|
|
SRSRAN_API int srsran_chest_ul_res_init(srsran_chest_ul_res_t* q, uint32_t max_prb);
|
|
|
|
SRSRAN_API void srsran_chest_ul_res_set_identity(srsran_chest_ul_res_t* q);
|
|
|
|
SRSRAN_API void srsran_chest_ul_res_free(srsran_chest_ul_res_t* q);
|
|
|
|
SRSRAN_API int srsran_chest_ul_set_cell(srsran_chest_ul_t* q, srsran_cell_t cell);
|
|
|
|
SRSRAN_API void srsran_chest_ul_pregen(srsran_chest_ul_t* q,
|
|
srsran_refsignal_dmrs_pusch_cfg_t* cfg,
|
|
srsran_refsignal_srs_cfg_t* srs_cfg);
|
|
|
|
SRSRAN_API int srsran_chest_ul_estimate_pusch(srsran_chest_ul_t* q,
|
|
srsran_ul_sf_cfg_t* sf,
|
|
srsran_pusch_cfg_t* cfg,
|
|
cf_t* input,
|
|
srsran_chest_ul_res_t* res);
|
|
|
|
SRSRAN_API int srsran_chest_ul_estimate_pucch(srsran_chest_ul_t* q,
|
|
srsran_ul_sf_cfg_t* sf,
|
|
srsran_pucch_cfg_t* cfg,
|
|
cf_t* input,
|
|
srsran_chest_ul_res_t* res);
|
|
|
|
SRSRAN_API int srsran_chest_ul_estimate_srs(srsran_chest_ul_t* q,
|
|
srsran_ul_sf_cfg_t* sf,
|
|
srsran_refsignal_srs_cfg_t* cfg,
|
|
srsran_refsignal_dmrs_pusch_cfg_t* pusch_cfg,
|
|
cf_t* input,
|
|
srsran_chest_ul_res_t* res);
|
|
|
|
#endif // SRSRAN_CHEST_UL_H
|