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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.0 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#ifndef __MODULATION_DEFS__H__
#define __MODULATION_DEFS__H__
#include "PHY/defs.h"
/** @addtogroup _PHY_MODULATION_
* @{
*/
/**
\fn void PHY_ofdm_mod(int *input,int *output,int fftsize,unsigned char nb_symbols,unsigned short nb_prefix_samples,Extension_t etype)
This function performs OFDM modulation with cyclic extension or zero-padding.
@param input The sequence input samples in the frequency-domain. This is a concatenation of the input symbols in SIMD redundant format
@param output The time-domain output signal
@param fftsize size of OFDM symbol size (\f$N_d\f$)
@param nb_symbols The number of OFDM symbols in the block
@param nb_prefix_samples The number of prefix/suffix/zero samples
@param etype Type of extension (CYCLIC_PREFIX,CYCLIC_SUFFIX,ZEROS)
*/
void PHY_ofdm_mod(int *input,
int *output,
int fftsize,
unsigned char nb_symbols,
unsigned short nb_prefix_samples,
Extension_t etype
);
#ifdef OPENAIR_LTE
/*!
\brief This function implements the OFDM front end processor on reception (FEP)
\param phy_vars_ue Pointer to PHY variables
\param l symbol within slot (0..6/7)
\param Ns Slot number (0..19)
\param sample_offset offset within rxdata (points to beginning of subframe)
\param no_prefix if 1 prefix is removed by HW
\param reset_freq_est if non-zero it resets the frequency offset estimation loop
*/
int slot_fep(PHY_VARS_UE *phy_vars_ue,
unsigned char l,
unsigned char Ns,
int sample_offset,
int no_prefix,
int reset_freq_est);
int slot_fep_mbsfn(PHY_VARS_UE *phy_vars_ue,
unsigned char l,
int subframe,
int sample_offset,
int no_prefix);
int slot_fep_ul(LTE_DL_FRAME_PARMS *frame_parms,
LTE_eNB_COMMON *eNb_common_vars,
unsigned char l,
unsigned char Ns,
unsigned char eNb_id,
int no_prefix);
void normal_prefix_mod(int32_t *txdataF,int32_t *txdata,uint8_t nsymb,LTE_DL_FRAME_PARMS *frame_parms);
void do_OFDM_mod(int32_t **txdataF, int32_t **txdata, uint32_t frame,uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms);
void do_OFDM_mod_symbol(LTE_eNB_COMMON *eNB_common_vars, int eNB_id, uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms);
void remove_7_5_kHz(PHY_VARS_eNB *phy_vars_eNB,uint8_t subframe);
void apply_7_5_kHz(PHY_VARS_UE *phy_vars_ue,int32_t*txdata,uint8_t subframe);
void init_prach625(LTE_DL_FRAME_PARMS *frame_parms);
void remove_625_Hz(PHY_VARS_eNB *phy_vars_eNB,int16_t *prach);
void apply_625_Hz(PHY_VARS_UE *phy_vars_ue,int16_t *prach);
/** \brief This function performs beamforming precoding for common
* data
@param txdataF Table of pointers for frequency-domain TX signals
@param txdataF_BF Table of pointers for frequency-domain TX signals
@param frame_parms Frame descriptor structure
after beamforming
@param beam_weights Beamforming weights applied on each
antenna element and each carrier
@param slot Slot number
@param symbol Symbol index on which to act
@param aa physical antenna index*/
int beam_precoding(int32_t **txdataF,
int32_t **txdataF_BF,
LTE_DL_FRAME_PARMS *frame_parms,
int32_t ***beam_weights,
int slot,
int symbol,
int aa);
int f_read(char *calibF_fname, int nb_ant, int nb_freq, int32_t **tdd_calib_coeffs);
int estimate_DLCSI_from_ULCSI(int32_t **calib_dl_ch_estimates, int32_t **ul_ch_estimates, int32_t **tdd_calib_coeffs, int nb_ant, int nb_freq);
int compute_BF_weights(int32_t **beam_weights, int32_t **calib_dl_ch_estimates, PRECODE_TYPE_t precode_type, int nb_ant, int nb_freq);
#endif
/** @}*/
#endif