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C

/*
* Copyright 2013-2020 Software Radio Systems Limited
*
* This file is part of srsLTE.
*
* 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 SRSLTE_HST_H_
#define SRSLTE_HST_H_
#include <srslte/srslte.h>
typedef struct {
// System parameters
uint32_t srate_hz; // Sampling rate
// Model Parameters
float fd_hz; // Maximum Doppler Frequency
float ds_m; // eNb distance [m]
float dmin_m; // eNb Rail-track distance [m]
float period_s; // 2 * Ds / speed [s]
float init_time_s; // Time offset [s]
// State
float fs_hz; // Last doppler dispersion [Hz]
} srslte_channel_hst_t;
#ifdef __cplusplus
extern "C" {
#endif
SRSLTE_API int srslte_channel_hst_init(srslte_channel_hst_t* q, float fd_hz, float period_d, float init_time_s);
SRSLTE_API void srslte_channel_hst_update_srate(srslte_channel_hst_t* q, uint32_t srate);
SRSLTE_API void
srslte_channel_hst_execute(srslte_channel_hst_t* q, cf_t* in, cf_t* out, uint32_t len, const srslte_timestamp_t* ts);
SRSLTE_API void srslte_channel_hst_free(srslte_channel_hst_t* q);
#ifdef __cplusplus
}
#endif
#endif // SRSLTE_HST_H_