mirror of https://github.com/PentHertz/srsLTE.git
162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2015 Software Radio Systems Limited
|
|
*
|
|
* \section LICENSE
|
|
*
|
|
* This file is part of the srsLTE library.
|
|
*
|
|
* 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_OFDM_H
|
|
#define SRSLTE_OFDM_H
|
|
|
|
/**********************************************************************************************
|
|
* File: ofdm.h
|
|
*
|
|
* Description: OFDM modulation object.
|
|
* Used in generation of downlink OFDM signals.
|
|
*
|
|
* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6
|
|
*********************************************************************************************/
|
|
|
|
#include <strings.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "srslte/config.h"
|
|
#include "srslte/phy/common/phy_common.h"
|
|
#include "srslte/phy/dft/dft.h"
|
|
|
|
/* This is common for both directions */
|
|
typedef struct SRSLTE_API{
|
|
srslte_dft_plan_t fft_plan;
|
|
srslte_dft_plan_t fft_plan_sf[2];
|
|
uint32_t max_prb;
|
|
uint32_t nof_symbols;
|
|
uint32_t symbol_sz;
|
|
uint32_t nof_guards;
|
|
uint32_t nof_re;
|
|
uint32_t slot_sz;
|
|
uint32_t sf_sz;
|
|
srslte_cp_t cp;
|
|
cf_t *tmp; // for removing zero padding
|
|
cf_t *in_buffer;
|
|
cf_t *out_buffer;
|
|
|
|
bool mbsfn_subframe;
|
|
uint32_t mbsfn_guard_len;
|
|
uint32_t nof_symbols_mbsfn;
|
|
uint8_t non_mbsfn_region;
|
|
|
|
|
|
bool freq_shift;
|
|
float freq_shift_f;
|
|
cf_t *shift_buffer;
|
|
}srslte_ofdm_t;
|
|
|
|
SRSLTE_API int srslte_ofdm_init_(srslte_ofdm_t *q,
|
|
srslte_cp_t cp,
|
|
cf_t *in_buffer,
|
|
cf_t *out_buffer,
|
|
int symbol_sz,
|
|
int nof_prb,
|
|
srslte_dft_dir_t dir);
|
|
|
|
SRSLTE_API int srslte_ofdm_init_mbsfn_(srslte_ofdm_t *q,
|
|
srslte_cp_t cp,
|
|
cf_t *in_buffer,
|
|
cf_t *out_buffer,
|
|
int symbol_sz,
|
|
int nof_prb,
|
|
srslte_dft_dir_t dir,
|
|
srslte_sf_t sf_type);
|
|
|
|
SRSLTE_API int srslte_ofdm_rx_init_mbsfn(srslte_ofdm_t *q,
|
|
srslte_cp_t cp_type,
|
|
cf_t *in_buffer,
|
|
cf_t *out_buffer,
|
|
uint32_t nof_prb);
|
|
|
|
SRSLTE_API int srslte_ofdm_rx_init(srslte_ofdm_t *q,
|
|
srslte_cp_t cp_type,
|
|
cf_t *in_buffer,
|
|
cf_t *out_buffer,
|
|
uint32_t max_prb);
|
|
|
|
SRSLTE_API int srslte_ofdm_tx_set_prb(srslte_ofdm_t *q,
|
|
srslte_cp_t cp,
|
|
uint32_t nof_prb);
|
|
|
|
SRSLTE_API int srslte_ofdm_rx_set_prb(srslte_ofdm_t *q,
|
|
srslte_cp_t cp,
|
|
uint32_t nof_prb);
|
|
|
|
SRSLTE_API void srslte_ofdm_rx_free(srslte_ofdm_t *q);
|
|
|
|
SRSLTE_API void srslte_ofdm_rx_slot(srslte_ofdm_t *q,
|
|
int slot_in_sf);
|
|
|
|
SRSLTE_API void srslte_ofdm_rx_slot_ng(srslte_ofdm_t *q,
|
|
cf_t *input,
|
|
cf_t *output);
|
|
|
|
SRSLTE_API void srslte_ofdm_rx_sf(srslte_ofdm_t *q);
|
|
|
|
SRSLTE_API void srslte_ofdm_rx_sf_ng(srslte_ofdm_t *q,
|
|
cf_t *input,
|
|
cf_t *output);
|
|
|
|
SRSLTE_API int srslte_ofdm_tx_init(srslte_ofdm_t *q,
|
|
srslte_cp_t cp_type,
|
|
cf_t *in_buffer,
|
|
cf_t *out_buffer,
|
|
uint32_t nof_prb);
|
|
|
|
SRSLTE_API int srslte_ofdm_tx_init_mbsfn(srslte_ofdm_t *q,
|
|
srslte_cp_t cp,
|
|
cf_t *in_buffer,
|
|
cf_t *out_buffer,
|
|
uint32_t nof_prb);
|
|
|
|
|
|
SRSLTE_API void srslte_ofdm_tx_free(srslte_ofdm_t *q);
|
|
|
|
SRSLTE_API void srslte_ofdm_tx_slot(srslte_ofdm_t *q,
|
|
int slot_in_sf);
|
|
|
|
SRSLTE_API void srslte_ofdm_tx_slot_mbsfn(srslte_ofdm_t *q,
|
|
cf_t *input,
|
|
cf_t *output);
|
|
|
|
|
|
SRSLTE_API void srslte_ofdm_tx_sf(srslte_ofdm_t *q);
|
|
|
|
SRSLTE_API int srslte_ofdm_set_freq_shift(srslte_ofdm_t *q,
|
|
float freq_shift);
|
|
|
|
SRSLTE_API void srslte_ofdm_set_normalize(srslte_ofdm_t *q,
|
|
bool normalize_enable);
|
|
|
|
SRSLTE_API void srslte_ofdm_set_non_mbsfn_region(srslte_ofdm_t *q,
|
|
uint8_t non_mbsfn_region);
|
|
|
|
|
|
#endif // SRSLTE_OFDM_H
|