/* * 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_freq(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_mbsfn_freq(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); int front_end_fft(PHY_VARS_UE *ue, unsigned char l, unsigned char Ns, int sample_offset, int no_prefix); int front_end_chanEst(PHY_VARS_UE *ue, unsigned char l, unsigned char Ns, int reset_freq_est); 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,int do_precoding); 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