107 lines
3.8 KiB
C
107 lines
3.8 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@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,unsigned char log2fftsize,unsigned char nb_symbols,unsigned short nb_prefix_samples,short *twiddle_ifft,unsigned short *rev,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 log2fftsize Base-2 logarithm of the 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 twiddle_ifft Pointer to the ifft twiddle factors
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@param rev Pointer to the bit-reversal permutation
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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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unsigned char log2fftsize,
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unsigned char nb_symbols,
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unsigned short nb_prefix_samples,
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short *twiddle_ifft,
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unsigned short *rev,
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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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*/
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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 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(mod_sym_t **txdataF, int32_t **txdata, uint32_t frame,uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms);
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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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#endif
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/** @}*/
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#endif
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