/******************************************************************************* OpenAirInterface Copyright(c) 1999 - 2014 Eurecom OpenAirInterface is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. OpenAirInterface 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 General Public License for more details. You should have received a copy of the GNU General Public License along with OpenAirInterface.The full GNU General Public License is included in this distribution in the file called "COPYING". If not, see <http://www.gnu.org/licenses/>. Contact Information OpenAirInterface Admin: openair_admin@eurecom.fr OpenAirInterface Tech : openair_tech@eurecom.fr OpenAirInterface Dev : openair4g-devel@eurecom.fr Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France. *******************************************************************************/ #ifndef __LTE_ESTIMATION_DEFS__H__ #define __LTE_ESTIMATION_DEFS__H__ #include "PHY/defs.h" /* #ifdef EMOS #include "SCHED/phy_procedures_emos.h" #endif */ /** @addtogroup _PHY_PARAMETER_ESTIMATION_BLOCKS_ * @{ */ /*!\brief Timing drift hysterisis in samples*/ #define SYNCH_HYST 1 /*! \brief This function allocates memory needed for the synchronization. \param frame_parms LTE DL frame parameter structure */ int lte_sync_time_init(LTE_DL_FRAME_PARMS *frame_parms); //LTE_UE_COMMON *common_vars /*! \fn void lte_sync_time_free() \brief This function frees the memory allocated by lte_sync_time_init. */ void lte_sync_time_free(void); /*! \brief This function performs the coarse timing synchronization. The algorithm uses a time domain correlation with a downsampled version of the received signal. \param rxdata Received time domain data for all rx antennas \param frame_parms LTE DL frame parameter structure \param eNB_id return value with the eNb_id \return sync_pos Position of the sync within the frame (downsampled) if successfull and -1 if there was an error or no peak was detected. */ int lte_sync_time(int **rxdata, LTE_DL_FRAME_PARMS *frame_parms, int *eNB_id); /*! \brief This function performs detection of the PRACH (=SRS) at the eNb to estimate the timing advance The algorithm uses a time domain correlation with a downsampled version of the received signal. \param rxdata Received time domain data for all rx antennas \param frame_parms LTE DL frame parameter structure \param length Length for correlation \param peak_val pointer to value of returned peak \param sync_corr_eNb pointer to correlation buffer \return sync_pos Position of the sync within the frame (downsampled) if successfull and -1 if there was an error or no peak was detected. */ int lte_sync_time_eNB(int32_t **rxdata, LTE_DL_FRAME_PARMS *frame_parms, uint32_t length, uint32_t *peak_val, uint32_t *sync_corr_eNb); int lte_sync_time_eNB_emul(PHY_VARS_eNB *phy_vars_eNb, uint8_t sect_id, int32_t *sync_val); /*! \brief This function performs channel estimation including frequency and temporal interpolation \param phy_vars_ue Pointer to UE PHY variables \param eNB_id Index of target eNB \param eNB_offset Offset for interfering eNB (in terms cell ID mod 3) \param Ns slot number (0..19) \param p antenna port \param l symbol within slot \param symbol symbol within frame */ int lte_dl_channel_estimation(PHY_VARS_UE *phy_vars_ue, module_id_t eNB_id, uint8_t eNB_offset, uint8_t Ns, uint8_t p, uint8_t l, uint8_t symbol); int lte_dl_msbfn_channel_estimation(PHY_VARS_UE *phy_vars_ue, module_id_t eNB_id, uint8_t eNB_offset, int subframe, unsigned char l, unsigned char symbol); int lte_dl_mbsfn_channel_estimation(PHY_VARS_UE *phy_vars_ue, module_id_t eNB_id, uint8_t eNB_offset, int subframe, unsigned char l); /* #ifdef EMOS int lte_dl_channel_estimation_emos(int dl_ch_estimates_emos[NB_ANTENNAS_RX*NB_ANTENNAS_TX][N_RB_DL_EMOS*N_PILOTS_PER_RB*N_SLOTS_EMOS], int **rxdataF, LTE_DL_FRAME_PARMS *frame_parms, unsigned char Ns, unsigned char p, unsigned char l, unsigned char sector); #endif */ /*! \brief Frequency offset estimation for LTE We estimate the frequency offset by calculating the phase difference between channel estimates for symbols carrying pilots (l==0 or l==3/4). We take a moving average of the phase difference. \param dl_ch_estimates pointer to structure that holds channel estimates (one slot) \param frame_parms pointer to LTE frame parameters \param l symbol within slot \param freq_offset pointer to the returned frequency offset */ int lte_est_freq_offset(int **dl_ch_estimates, LTE_DL_FRAME_PARMS *frame_parms, int l, int* freq_offset); int lte_mbsfn_est_freq_offset(int **dl_ch_estimates, LTE_DL_FRAME_PARMS *frame_parms, int l, int* freq_offset); /*! \brief Tracking of timing for LTE This function computes the time domain channel response, finds the peak and adjusts the timing in pci_interface.offset accordingly. \param frame_parms LTE DL frame parameter structure \param phy_vars_ue Pointer to UE PHY data structure \param eNb_id \param clear If clear==1 moving average filter is reset \param coef Coefficient of the moving average filter (Q1.15) */ void lte_adjust_synch(LTE_DL_FRAME_PARMS *frame_parms, PHY_VARS_UE *phy_vars_ue, module_id_t eNb_id, unsigned char clear, short coef); //! \brief this function fills the PHY_VARS_UE->PHY_measurement structure void lte_ue_measurements(PHY_VARS_UE *phy_vars_ue, unsigned int subframe_offset, unsigned char N0_symbol, unsigned char abstraction_flag); //! \brief This function performance RSRP/RSCP measurements void ue_rrc_measurements(PHY_VARS_UE *phy_vars_ue, uint8_t slot, uint8_t abstraction_flag); void lte_ue_measurements_emul(PHY_VARS_UE *phy_vars_ue,uint8_t last_slot,uint8_t eNB_id); /*! \brief Function to return the path-loss based on the UE cell-specific reference signal strength and transmission power of eNB @param Mod_id Module ID for UE @param eNB_index Index of eNB on which to act @returns Path loss in dB */ int16_t get_PL(module_id_t Mod_id,uint8_t CC_id,uint8_t eNB_index); uint32_t get_RSRP(module_id_t Mod_id,uint8_t CC_id,uint8_t eNB_index); uint32_t get_RSRQ(module_id_t Mod_id,uint8_t CC_id,uint8_t eNB_index); uint8_t get_n_adj_cells(module_id_t Mod_id,uint8_t CC_id); uint32_t get_rx_total_gain_dB(module_id_t Mod_id,uint8_t CC_id); uint32_t get_RSSI(module_id_t Mod_id,uint8_t CC_id); int8_t set_RSRP_filtered(module_id_t Mod_id,uint8_t CC_id,uint8_t eNB_index,float rsrp); int8_t set_RSRQ_filtered(module_id_t Mod_id,uint8_t CC_id,uint8_t eNB_index,float rstq); //! Automatic gain control void phy_adjust_gain (PHY_VARS_UE *phy_vars_ue, unsigned char eNB_id); int lte_ul_channel_estimation(PHY_VARS_eNB *phy_vars_eNB, module_id_t eNB_id, module_id_t UE_id, uint8_t subframe, uint8_t l, uint8_t Ns, uint8_t cooperation_flag); int16_t lte_ul_freq_offset_estimation(LTE_DL_FRAME_PARMS *frame_parms, int32_t *ul_ch_estimates, uint16_t nb_rb); int lte_srs_channel_estimation(LTE_DL_FRAME_PARMS *frame_parms, LTE_eNB_COMMON *eNb_common_vars, LTE_eNB_SRS *eNb_srs_vars, SOUNDINGRS_UL_CONFIG_DEDICATED *soundingrs_ul_config_dedicated, unsigned char sub_frame_number, unsigned char eNb_id); int lte_est_timing_advance(LTE_DL_FRAME_PARMS *frame_parms, LTE_eNB_SRS *lte_eNb_srs, unsigned int *eNb_id, unsigned char clear, unsigned char number_of_cards, short coef); int lte_est_timing_advance_pusch(PHY_VARS_eNB* phy_vars_eNB,module_id_t UE_id,uint8_t subframe); void lte_eNB_I0_measurements(PHY_VARS_eNB *phy_vars_eNb, module_id_t eNB_id, unsigned char clear); void lte_eNB_I0_measurements_emul(PHY_VARS_eNB *phy_vars_eNb, uint8_t sect_id); void lte_eNB_srs_measurements(PHY_VARS_eNB *phy_vars_eNb, module_id_t eNB_id, module_id_t UE_id, unsigned char init_averaging); void freq_equalization(LTE_DL_FRAME_PARMS *frame_parms, int **rxdataF_comp, int **ul_ch_mag, int **ul_ch_mag_b, unsigned char symbol, unsigned short Msc_RS, unsigned char Qm); /** @} */ #endif