263 lines
11 KiB
C
263 lines
11 KiB
C
/*
|
|
* 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 1.1 (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 __LTE_ESTIMATION_DEFS__H__
|
|
#define __LTE_ESTIMATION_DEFS__H__
|
|
|
|
|
|
#include "PHY/defs_UE.h"
|
|
#include "PHY/defs_eNB.h"
|
|
/** @addtogroup _PHY_PARAMETER_ESTIMATION_BLOCKS_
|
|
* @{
|
|
*/
|
|
|
|
/*!\brief Timing drift hysterisis in samples*/
|
|
#define SYNCH_HYST 2
|
|
|
|
/*!
|
|
\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(c16_t **rxdata, LTE_DL_FRAME_PARMS *frame_parms, int *eNB_id);
|
|
|
|
/*!
|
|
\brief This function performs the coarse frequency and PSS synchronization.
|
|
The algorithm uses a frequency-domain correlation. It scans over 20 MHz/10ms signal chunks using each of the 3 PSS finding the most likely (strongest) carriers and their frequency offset (+-2.5 kHz).
|
|
\param ue Pointer to UE data structure
|
|
\param band index of band in scan_info structure, used to store statistics
|
|
\param DL_freq center frequency of band being scanned, used when storing statistics
|
|
*/
|
|
void lte_sync_timefreq(PHY_VARS_UE *ue,
|
|
int band,
|
|
unsigned int DL_freq);
|
|
|
|
int ru_sync_time_init(RU_t *ru);
|
|
|
|
int ru_sync_time(RU_t *ru,
|
|
int64_t *lev,
|
|
int64_t *avg);
|
|
|
|
void ru_sync_time_free(RU_t *ru);
|
|
|
|
/*!
|
|
\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_bf_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 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);
|
|
|
|
int lte_dl_mbsfn_khz_1dot25_channel_estimation(PHY_VARS_UE *ue,
|
|
module_id_t eNB_id,
|
|
uint8_t eNB_offset,
|
|
int subframe);
|
|
|
|
/*!
|
|
\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
|
|
\param reset When non-zer it resets the filter to the initial value (set whenever tuning has been changed or for a one-shot estimate)
|
|
*/
|
|
int lte_est_freq_offset(int **dl_ch_estimates,
|
|
LTE_DL_FRAME_PARMS *frame_parms,
|
|
int l,
|
|
int* freq_offset,
|
|
int reset);
|
|
|
|
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 subframe
|
|
\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,
|
|
uint8_t subframe,
|
|
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,
|
|
unsigned char rank_adaptation,
|
|
uint8_t subframe);
|
|
|
|
//! \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 CC_id
|
|
@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);
|
|
double 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,
|
|
uint32_t rx_power_fil_dB,
|
|
unsigned char eNB_id);
|
|
|
|
int32_t lte_ul_channel_estimation(LTE_DL_FRAME_PARMS *frame_parms,
|
|
L1_rxtx_proc_t *proc,
|
|
LTE_eNB_ULSCH_t *ulsch,
|
|
c16_t **ul_ch_estimates,
|
|
c16_t **ul_ch_estimates_time,
|
|
c16_t **rxdataF_ext,
|
|
module_id_t UE_id,
|
|
uint8_t l,
|
|
uint8_t Ns);
|
|
|
|
int32_t lte_ul_channel_estimation_RRU(LTE_DL_FRAME_PARMS *frame_parms,
|
|
c16_t **ul_ch_estimates,
|
|
c16_t **ul_ch_estimates_time,
|
|
c16_t **rxdataF_ext,
|
|
int N_rb_alloc,
|
|
int frame_rx,
|
|
int subframe_rx,
|
|
uint32_t u,
|
|
uint32_t v,
|
|
uint32_t cyclic_shift,
|
|
unsigned char l,
|
|
int interpolate,
|
|
uint16_t rnti);
|
|
|
|
int16_t lte_ul_freq_offset_estimation(LTE_DL_FRAME_PARMS *frame_parms, c16_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(LTE_DL_FRAME_PARMS *frame_parms, c16_t **ul_ch_estimates_time);
|
|
|
|
void lte_eNB_I0_measurements(PHY_VARS_eNB *phy_vars_eNB,
|
|
int subframe,
|
|
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_eNBy,
|
|
module_id_t eNB_id,
|
|
module_id_t UE_id,
|
|
unsigned char init_averaging);
|
|
|
|
void freq_equalization(LTE_DL_FRAME_PARMS *frame_parms,
|
|
c16_t **rxdataF_comp,
|
|
c16_t **ul_ch_mag,
|
|
c16_t **ul_ch_mag_b,
|
|
unsigned char symbol,
|
|
unsigned short Msc_RS,
|
|
unsigned char Qm);
|
|
|
|
void init_fde(void);
|
|
|
|
void dump_I0_stats(FILE *fd,PHY_VARS_eNB *eNB);
|
|
/** @} */
|
|
#endif
|