mirror of https://github.com/PentHertz/srsLTE.git
152 lines
6.6 KiB
C
152 lines
6.6 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2020 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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#ifndef SRSLTE_NPDSCH_H
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#define SRSLTE_NPDSCH_H
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/fec/convolutional/convcoder.h"
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#include "srslte/phy/fec/crc.h"
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#include "srslte/phy/mimo/layermap.h"
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#include "srslte/phy/mimo/precoding.h"
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#include "srslte/phy/modem/demod_soft.h"
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#include "srslte/phy/modem/mod.h"
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#include "srslte/phy/phch/dci.h"
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#include "srslte/phy/phch/npdsch_cfg.h"
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#include "srslte/phy/phch/regs.h"
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#include "srslte/phy/phch/sch.h"
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#include "srslte/phy/scrambling/scrambling.h"
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#define SRSLTE_NPDSCH_MAX_RE \
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(SRSLTE_CP_NORM_SF_NSYMB * SRSLTE_NRE - 8) ///< Full PRB minus 8 RE for NRS (one antenna port)
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#define SRSLTE_NPDSCH_MAX_TBS 680 ///< Max TBS in Rel13 NB-IoT
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#define SRSLTE_NPDSCH_CRC_LEN (24)
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#define SRSLTE_NPDSCH_MAX_TBS_CRC (SRSLTE_NPDSCH_MAX_TBS + SRSLTE_NPDSCH_CRC_LEN)
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#define SRSLTE_NPDSCH_MAX_TBS_ENC (3 * SRSLTE_NPDSCH_MAX_TBS_CRC)
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#define SRSLTE_NPDSCH_MAX_NOF_SF 10
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#define SRSLTE_NPDSCH_NUM_SEQ (2 * SRSLTE_NOF_SF_X_FRAME) ///< for even and odd numbered SFNs
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/* @brief Narrowband Physical Downlink shared channel (NPDSCH)
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*
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* Reference: 3GPP TS 36.211 version 13.2.0 Release 13 Sec. 10.2.3
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*/
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typedef struct SRSLTE_API {
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srslte_nbiot_cell_t cell;
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uint32_t max_re;
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bool rnti_is_set;
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uint16_t rnti;
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// buffers
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uint8_t data[SRSLTE_NPDSCH_MAX_TBS_CRC];
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uint8_t data_enc[SRSLTE_NPDSCH_MAX_TBS_ENC];
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float rm_f[SRSLTE_NPDSCH_MAX_TBS_ENC];
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cf_t* ce[SRSLTE_MAX_PORTS];
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cf_t* symbols[SRSLTE_MAX_PORTS];
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cf_t* sib_symbols[SRSLTE_MAX_PORTS]; // extra buffer for SIB1 symbols as they may be interleaved with other NPDSCH
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cf_t* tx_syms[SRSLTE_MAX_PORTS]; // pointer to either symbols or sib1_symbols
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cf_t* x[SRSLTE_MAX_PORTS];
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cf_t* d;
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float* llr;
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uint8_t* temp;
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uint8_t* rm_b;
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// tx & rx objects
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srslte_modem_table_t mod;
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srslte_viterbi_t decoder;
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srslte_sequence_t seq[SRSLTE_NPDSCH_NUM_SEQ];
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srslte_crc_t crc;
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srslte_convcoder_t encoder;
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} srslte_npdsch_t;
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typedef struct {
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uint16_t hyper_sfn;
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// TODO: add all other fields
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} srslte_sys_info_block_type_1_nb_t;
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SRSLTE_API int srslte_npdsch_init(srslte_npdsch_t* q);
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SRSLTE_API void srslte_npdsch_free(srslte_npdsch_t* q);
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SRSLTE_API int srslte_npdsch_set_cell(srslte_npdsch_t* q, srslte_nbiot_cell_t cell);
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SRSLTE_API int srslte_npdsch_set_rnti(srslte_npdsch_t* q, uint16_t rnti);
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SRSLTE_API int srslte_npdsch_cfg(srslte_npdsch_cfg_t* cfg,
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srslte_nbiot_cell_t cell,
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srslte_ra_nbiot_dl_grant_t* grant,
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uint32_t sf_idx);
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SRSLTE_API int srslte_npdsch_encode(srslte_npdsch_t* q,
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srslte_npdsch_cfg_t* cfg,
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srslte_softbuffer_tx_t* softbuffer,
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uint8_t* data,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS]);
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SRSLTE_API int srslte_npdsch_encode_rnti_idx(srslte_npdsch_t* q,
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srslte_npdsch_cfg_t* cfg,
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srslte_softbuffer_tx_t* softbuffer,
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uint8_t* data,
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uint32_t rnti_idx,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS]);
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SRSLTE_API int srslte_npdsch_encode_rnti(srslte_npdsch_t* q,
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srslte_npdsch_cfg_t* cfg,
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srslte_softbuffer_tx_t* softbuffer,
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uint8_t* data,
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uint16_t rnti,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS]);
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SRSLTE_API int srslte_npdsch_encode_seq(srslte_npdsch_t* q,
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srslte_npdsch_cfg_t* cfg,
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srslte_softbuffer_tx_t* softbuffer,
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uint8_t* data,
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srslte_sequence_t* seq,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS]);
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SRSLTE_API int srslte_npdsch_decode(srslte_npdsch_t* q,
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srslte_npdsch_cfg_t* cfg,
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srslte_softbuffer_rx_t* softbuffer,
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cf_t* sf_symbols,
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cf_t* ce[SRSLTE_MAX_PORTS],
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float noise_estimate,
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uint32_t sfn,
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uint8_t* data);
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SRSLTE_API int srslte_npdsch_decode_rnti(srslte_npdsch_t* q,
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srslte_npdsch_cfg_t* cfg,
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srslte_softbuffer_rx_t* softbuffer,
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cf_t* sf_symbols,
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cf_t* ce[SRSLTE_MAX_PORTS],
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float noise_estimate,
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uint16_t rnti,
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uint32_t sfn,
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uint8_t* data,
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uint32_t rep_counter);
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SRSLTE_API int
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srslte_npdsch_rm_and_decode(srslte_npdsch_t* q, srslte_npdsch_cfg_t* cfg, float* softbits, uint8_t* data);
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SRSLTE_API int
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srslte_npdsch_cp(srslte_npdsch_t* q, cf_t* input, cf_t* output, srslte_ra_nbiot_dl_grant_t* grant, bool put);
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SRSLTE_API float srslte_npdsch_average_noi(srslte_npdsch_t* q);
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SRSLTE_API uint32_t srslte_npdsch_last_noi(srslte_npdsch_t* q);
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SRSLTE_API void srslte_npdsch_sib1_pack(srslte_cell_t* cell, srslte_sys_info_block_type_1_nb_t* sib, uint8_t* payload);
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SRSLTE_API void srslte_npdsch_sib1_unpack(uint8_t* const msg, srslte_sys_info_block_type_1_nb_t* sib);
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#endif // SRSLTE_NPDSCH_H
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