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105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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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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/**********************************************************************************************
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* File: agc.h
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*
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* Description: Automatic gain control
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* This module is not currently used
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*
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* Reference:
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*********************************************************************************************/
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#ifndef SRSLTE_AGC_H
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#define SRSLTE_AGC_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <complex.h>
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#include "srslte/config.h"
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#define SRSLTE_AGC_DEFAULT_TARGET 0.3
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#define SRSLTE_AGC_DEFAULT_BW 0.7
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typedef enum SRSLTE_API {
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SRSLTE_AGC_MODE_ENERGY = 0,
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SRSLTE_AGC_MODE_PEAK_AMPLITUDE
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} srslte_agc_mode_t;
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typedef struct SRSLTE_API{
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float bandwidth;
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double gain;
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float y_out;
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bool lock;
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bool isfirst;
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void *uhd_handler;
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double (*set_gain_callback) (void*,double);
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srslte_agc_mode_t mode;
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float target;
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uint32_t nof_frames;
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uint32_t frame_cnt;
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float *y_tmp;
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} srslte_agc_t;
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SRSLTE_API int srslte_agc_init(srslte_agc_t *q, srslte_agc_mode_t mode);
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SRSLTE_API int srslte_agc_init_acc(srslte_agc_t *q, srslte_agc_mode_t mode, uint32_t nof_frames);
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SRSLTE_API int srslte_agc_init_uhd(srslte_agc_t *q,
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srslte_agc_mode_t mode,
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uint32_t nof_frames,
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double (set_gain_callback)(void*, double),
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void *uhd_handler);
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SRSLTE_API void srslte_agc_free(srslte_agc_t *q);
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SRSLTE_API void srslte_agc_reset(srslte_agc_t *q);
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SRSLTE_API void srslte_agc_set_bandwidth(srslte_agc_t *q,
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float bandwidth);
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SRSLTE_API void srslte_agc_set_target(srslte_agc_t *q,
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float target);
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SRSLTE_API float srslte_agc_get_rssi(srslte_agc_t *q);
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SRSLTE_API float srslte_agc_get_output_level(srslte_agc_t *q);
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SRSLTE_API float srslte_agc_get_gain(srslte_agc_t *q);
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SRSLTE_API void srslte_agc_set_gain(srslte_agc_t *q,
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float init_gain_value);
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SRSLTE_API void srslte_agc_lock(srslte_agc_t *q,
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bool enable);
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SRSLTE_API void srslte_agc_process(srslte_agc_t *q,
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cf_t *signal,
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uint32_t len);
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#endif // SRSLTE_AGC_H
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