mirror of https://github.com/PentHertz/srsLTE.git
146 lines
6.0 KiB
C
146 lines
6.0 KiB
C
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2021 Software Radio Systems Limited
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the distribution.
|
|
*
|
|
*/
|
|
|
|
/******************************************************************************
|
|
* File: pdcch.h
|
|
*
|
|
* Description: Physical downlink control channel.
|
|
*
|
|
* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.8
|
|
*****************************************************************************/
|
|
|
|
#ifndef SRSRAN_PDCCH_H
|
|
#define SRSRAN_PDCCH_H
|
|
|
|
#include "srsran/config.h"
|
|
#include "srsran/phy/ch_estimation/chest_dl.h"
|
|
#include "srsran/phy/common/phy_common.h"
|
|
#include "srsran/phy/fec/convolutional/convcoder.h"
|
|
#include "srsran/phy/fec/convolutional/rm_conv.h"
|
|
#include "srsran/phy/fec/convolutional/viterbi.h"
|
|
#include "srsran/phy/fec/crc.h"
|
|
#include "srsran/phy/mimo/layermap.h"
|
|
#include "srsran/phy/mimo/precoding.h"
|
|
#include "srsran/phy/modem/demod_soft.h"
|
|
#include "srsran/phy/modem/mod.h"
|
|
#include "srsran/phy/phch/dci.h"
|
|
#include "srsran/phy/phch/regs.h"
|
|
#include "srsran/phy/scrambling/scrambling.h"
|
|
|
|
typedef enum SRSRAN_API { SEARCH_UE, SEARCH_COMMON } srsran_pdcch_search_mode_t;
|
|
|
|
/* PDCCH object */
|
|
typedef struct SRSRAN_API {
|
|
srsran_cell_t cell;
|
|
uint32_t nof_regs[3];
|
|
uint32_t nof_cce[3];
|
|
uint32_t max_bits;
|
|
uint32_t nof_rx_antennas;
|
|
bool is_ue;
|
|
|
|
srsran_regs_t* regs;
|
|
|
|
/* buffers */
|
|
cf_t* ce[SRSRAN_MAX_PORTS][SRSRAN_MAX_PORTS];
|
|
cf_t* symbols[SRSRAN_MAX_PORTS];
|
|
cf_t* x[SRSRAN_MAX_PORTS];
|
|
cf_t* d;
|
|
uint8_t* e;
|
|
float rm_f[3 * (SRSRAN_DCI_MAX_BITS + 16)];
|
|
float* llr;
|
|
|
|
/* tx & rx objects */
|
|
srsran_modem_table_t mod;
|
|
srsran_sequence_t seq[SRSRAN_NOF_SF_X_FRAME];
|
|
srsran_viterbi_t decoder;
|
|
srsran_crc_t crc;
|
|
|
|
} srsran_pdcch_t;
|
|
|
|
SRSRAN_API int srsran_pdcch_init_ue(srsran_pdcch_t* q, uint32_t max_prb, uint32_t nof_rx_antennas);
|
|
|
|
SRSRAN_API int srsran_pdcch_init_enb(srsran_pdcch_t* q, uint32_t max_prb);
|
|
|
|
SRSRAN_API int srsran_pdcch_set_cell(srsran_pdcch_t* q, srsran_regs_t* regs, srsran_cell_t cell);
|
|
|
|
SRSRAN_API void srsran_pdcch_set_regs(srsran_pdcch_t* q, srsran_regs_t* regs);
|
|
|
|
SRSRAN_API void srsran_pdcch_free(srsran_pdcch_t* q);
|
|
|
|
SRSRAN_API float srsran_pdcch_coderate(uint32_t nof_bits, uint32_t l);
|
|
|
|
/* Encoding function */
|
|
SRSRAN_API int srsran_pdcch_encode(srsran_pdcch_t* q,
|
|
srsran_dl_sf_cfg_t* sf,
|
|
srsran_dci_msg_t* msg,
|
|
cf_t* sf_symbols[SRSRAN_MAX_PORTS]);
|
|
|
|
/* Decoding functions: Extract the LLRs and save them in the srsran_pdcch_t object */
|
|
|
|
SRSRAN_API int srsran_pdcch_extract_llr(srsran_pdcch_t* q,
|
|
srsran_dl_sf_cfg_t* sf,
|
|
srsran_chest_dl_res_t* channel,
|
|
cf_t* sf_symbols[SRSRAN_MAX_PORTS]);
|
|
|
|
/* Decoding functions: Try to decode a DCI message after calling srsran_pdcch_extract_llr */
|
|
SRSRAN_API int
|
|
srsran_pdcch_decode_msg(srsran_pdcch_t* q, srsran_dl_sf_cfg_t* sf, srsran_dci_cfg_t* dci_cfg, srsran_dci_msg_t* msg);
|
|
|
|
/**
|
|
* @brief Computes decoded DCI correlation. It encodes the given DCI message and compares it with the received LLRs
|
|
* @param q PDCCH object
|
|
* @param msg Previously decoded DCI message
|
|
* @return The normalized correlation between the restored symbols and the received LLRs
|
|
*/
|
|
SRSRAN_API float srsran_pdcch_msg_corr(srsran_pdcch_t* q, srsran_dci_msg_t* msg);
|
|
|
|
SRSRAN_API int
|
|
srsran_pdcch_dci_decode(srsran_pdcch_t* q, float* e, uint8_t* data, uint32_t E, uint32_t nof_bits, uint16_t* crc);
|
|
|
|
SRSRAN_API int
|
|
srsran_pdcch_dci_encode(srsran_pdcch_t* q, uint8_t* data, uint8_t* e, uint32_t nof_bits, uint32_t E, uint16_t rnti);
|
|
|
|
SRSRAN_API void
|
|
srsran_pdcch_dci_encode_conv(srsran_pdcch_t* q, uint8_t* data, uint32_t nof_bits, uint8_t* coded_data, uint16_t rnti);
|
|
|
|
/* Function for generation of UE-specific search space DCI locations */
|
|
SRSRAN_API uint32_t srsran_pdcch_ue_locations(srsran_pdcch_t* q,
|
|
srsran_dl_sf_cfg_t* sf,
|
|
srsran_dci_location_t* locations,
|
|
uint32_t max_locations,
|
|
uint16_t rnti);
|
|
|
|
SRSRAN_API uint32_t srsran_pdcch_ue_locations_ncce(uint32_t nof_cce,
|
|
srsran_dci_location_t* c,
|
|
uint32_t max_candidates,
|
|
uint32_t sf_idx,
|
|
uint16_t rnti);
|
|
|
|
SRSRAN_API uint32_t srsran_pdcch_ue_locations_ncce_L(uint32_t nof_cce,
|
|
srsran_dci_location_t* c,
|
|
uint32_t max_candidates,
|
|
uint32_t sf_idx,
|
|
uint16_t rnti,
|
|
int L);
|
|
|
|
/* Function for generation of common search space DCI locations */
|
|
SRSRAN_API uint32_t srsran_pdcch_common_locations(srsran_pdcch_t* q,
|
|
srsran_dci_location_t* locations,
|
|
uint32_t max_locations,
|
|
uint32_t cfi);
|
|
|
|
SRSRAN_API uint32_t srsran_pdcch_common_locations_ncce(uint32_t nof_cce,
|
|
srsran_dci_location_t* c,
|
|
uint32_t max_candidates);
|
|
|
|
#endif // SRSRAN_PDCCH_H
|