mirror of https://github.com/PentHertz/srsLTE.git
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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/******************************************************************************
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* File: phich.h
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*
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* Description: Physical Hybrid ARQ indicator channel.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.9
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*****************************************************************************/
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#ifndef SRSRAN_PHICH_H
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#define SRSRAN_PHICH_H
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#include "regs.h"
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#include "srsran/config.h"
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#include "srsran/phy/ch_estimation/chest_dl.h"
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#include "srsran/phy/common/phy_common.h"
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#include "srsran/phy/mimo/layermap.h"
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#include "srsran/phy/mimo/precoding.h"
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#include "srsran/phy/modem/demod_soft.h"
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#include "srsran/phy/modem/mod.h"
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#include "srsran/phy/scrambling/scrambling.h"
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#define SRSRAN_PHICH_NORM_NSEQUENCES 8
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#define SRSRAN_PHICH_EXT_NSEQUENCES 4
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#define SRSRAN_PHICH_NBITS 3
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#define SRSRAN_PHICH_NORM_MSYMB SRSRAN_PHICH_NBITS * 4
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#define SRSRAN_PHICH_EXT_MSYMB SRSRAN_PHICH_NBITS * 2
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#define SRSRAN_PHICH_MAX_NSYMB SRSRAN_PHICH_NORM_MSYMB
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#define SRSRAN_PHICH_NORM_C 1
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#define SRSRAN_PHICH_EXT_C 2
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#define SRSRAN_PHICH_NORM_NSF 4
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#define SRSRAN_PHICH_EXT_NSF 2
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/* phich object */
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typedef struct SRSRAN_API {
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srsran_cell_t cell;
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uint32_t nof_rx_antennas;
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/* handler to REGs resource mapper */
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srsran_regs_t* regs;
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/* buffers */
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cf_t ce[SRSRAN_MAX_PORTS][SRSRAN_MAX_PORTS][SRSRAN_PHICH_MAX_NSYMB];
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cf_t sf_symbols[SRSRAN_MAX_PORTS][SRSRAN_PHICH_MAX_NSYMB];
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cf_t x[SRSRAN_MAX_PORTS][SRSRAN_PHICH_MAX_NSYMB];
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cf_t d[SRSRAN_PHICH_MAX_NSYMB];
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cf_t d0[SRSRAN_PHICH_MAX_NSYMB];
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cf_t z[SRSRAN_PHICH_NBITS];
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/* bit message */
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uint8_t data[SRSRAN_PHICH_NBITS];
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float data_rx[SRSRAN_PHICH_NBITS];
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/* tx & rx objects */
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srsran_modem_table_t mod;
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srsran_sequence_t seq[SRSRAN_NOF_SF_X_FRAME];
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} srsran_phich_t;
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typedef struct SRSRAN_API {
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uint32_t ngroup;
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uint32_t nseq;
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} srsran_phich_resource_t;
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typedef struct SRSRAN_API {
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uint32_t n_prb_lowest;
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uint32_t n_dmrs;
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uint32_t I_phich;
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} srsran_phich_grant_t;
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typedef struct SRSRAN_API {
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bool ack_value;
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float distance;
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} srsran_phich_res_t;
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SRSRAN_API int srsran_phich_init(srsran_phich_t* q, uint32_t nof_rx_antennas);
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SRSRAN_API void srsran_phich_free(srsran_phich_t* q);
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SRSRAN_API int srsran_phich_set_cell(srsran_phich_t* q, srsran_regs_t* regs, srsran_cell_t cell);
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SRSRAN_API void srsran_phich_set_regs(srsran_phich_t* q, srsran_regs_t* regs);
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SRSRAN_API void srsran_phich_calc(srsran_phich_t* q, srsran_phich_grant_t* grant, srsran_phich_resource_t* n_phich);
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SRSRAN_API int srsran_phich_decode(srsran_phich_t* q,
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srsran_dl_sf_cfg_t* sf,
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srsran_chest_dl_res_t* channel,
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srsran_phich_resource_t n_phich,
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cf_t* sf_symbols[SRSRAN_MAX_PORTS],
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srsran_phich_res_t* result);
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SRSRAN_API int srsran_phich_encode(srsran_phich_t* q,
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srsran_dl_sf_cfg_t* sf,
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srsran_phich_resource_t n_phich,
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uint8_t ack,
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cf_t* sf_symbols[SRSRAN_MAX_PORTS]);
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SRSRAN_API void srsran_phich_reset(srsran_phich_t* q, cf_t* slot_symbols[SRSRAN_MAX_PORTS]);
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SRSRAN_API uint32_t srsran_phich_ngroups(srsran_phich_t* q);
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SRSRAN_API uint32_t srsran_phich_nsf(srsran_phich_t* q);
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#endif // SRSRAN_PHICH_H
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