131 lines
5.0 KiB
C
131 lines
5.0 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
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Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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#ifndef __MODULATION_DEFS__H__
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#define __MODULATION_DEFS__H__
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#include "PHY/defs.h"
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/** @addtogroup _PHY_MODULATION_
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* @{
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*/
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/**
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\fn void PHY_ofdm_mod(int *input,int *output,int fftsize,unsigned char nb_symbols,unsigned short nb_prefix_samples,Extension_t etype)
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This function performs OFDM modulation with cyclic extension or zero-padding.
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@param input The sequence input samples in the frequency-domain. This is a concatenation of the input symbols in SIMD redundant format
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@param output The time-domain output signal
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@param fftsize size of OFDM symbol size (\f$N_d\f$)
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@param nb_symbols The number of OFDM symbols in the block
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@param nb_prefix_samples The number of prefix/suffix/zero samples
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@param etype Type of extension (CYCLIC_PREFIX,CYCLIC_SUFFIX,ZEROS)
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*/
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void PHY_ofdm_mod(int *input,
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int *output,
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int fftsize,
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unsigned char nb_symbols,
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unsigned short nb_prefix_samples,
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Extension_t etype
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);
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#ifdef OPENAIR_LTE
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/*!
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\brief This function implements the OFDM front end processor on reception (FEP)
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\param phy_vars_ue Pointer to PHY variables
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\param l symbol within slot (0..6/7)
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\param Ns Slot number (0..19)
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\param sample_offset offset within rxdata (points to beginning of subframe)
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\param no_prefix if 1 prefix is removed by HW
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\param reset_freq_est if non-zero it resets the frequency offset estimation loop
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*/
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int slot_fep(PHY_VARS_UE *phy_vars_ue,
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unsigned char l,
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unsigned char Ns,
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int sample_offset,
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int no_prefix,
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int reset_freq_est);
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int slot_fep_mbsfn(PHY_VARS_UE *phy_vars_ue,
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unsigned char l,
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int subframe,
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int sample_offset,
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int no_prefix);
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int slot_fep_ul(LTE_DL_FRAME_PARMS *frame_parms,
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LTE_eNB_COMMON *eNb_common_vars,
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unsigned char l,
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unsigned char Ns,
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unsigned char eNb_id,
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int no_prefix);
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void normal_prefix_mod(int32_t *txdataF,int32_t *txdata,uint8_t nsymb,LTE_DL_FRAME_PARMS *frame_parms);
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void do_OFDM_mod(int32_t **txdataF, int32_t **txdata, uint32_t frame,uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms);
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void do_OFDM_mod_l(LTE_eNB_COMMON *eNB_common_vars, int eNB_id, uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms, uint8_t num_pdcch_symbols);
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void remove_7_5_kHz(PHY_VARS_eNB *phy_vars_eNB,uint8_t subframe);
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void apply_7_5_kHz(PHY_VARS_UE *phy_vars_ue,int32_t*txdata,uint8_t subframe);
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void init_prach625(LTE_DL_FRAME_PARMS *frame_parms);
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void remove_625_Hz(PHY_VARS_eNB *phy_vars_eNB,int16_t *prach);
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void apply_625_Hz(PHY_VARS_UE *phy_vars_ue,int16_t *prach);
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/** \brief This function performs beamforming precoding for common
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* data
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@param txdataF Table of pointers for frequency-domain TX signals
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@param txdataF_BF Table of pointers for frequency-domain TX signals
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@param frame_parms Frame descriptor structure
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after beamforming
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@param beam_weights Beamforming weights applied on each
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antenna element and each carrier
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@param slot Slot number
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@param symbol Symbol index on which to act*/
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int beam_precoding(int32_t **txdataF,
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int32_t **txdataF_BF,
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LTE_DL_FRAME_PARMS *frame_parms,
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int32_t ***beam_weights,
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int slot,
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int symbol);
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int f_read(char *calibF_fname, int nb_ant, int nb_freq, int32_t **tdd_calib_coeffs);
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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);
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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);
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#endif
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/** @}*/
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#endif
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