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152 lines
6.6 KiB
C
152 lines
6.6 KiB
C
4 years ago
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/**
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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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#ifndef SRSRAN_NPDSCH_H
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#define SRSRAN_NPDSCH_H
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#include "srsran/config.h"
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#include "srsran/phy/common/phy_common.h"
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#include "srsran/phy/fec/convolutional/convcoder.h"
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#include "srsran/phy/fec/crc.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/phch/dci.h"
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#include "srsran/phy/phch/npdsch_cfg.h"
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#include "srsran/phy/phch/regs.h"
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#include "srsran/phy/phch/sch.h"
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#include "srsran/phy/scrambling/scrambling.h"
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#define SRSRAN_NPDSCH_MAX_RE \
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(SRSRAN_CP_NORM_SF_NSYMB * SRSRAN_NRE - 8) ///< Full PRB minus 8 RE for NRS (one antenna port)
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#define SRSRAN_NPDSCH_MAX_TBS 680 ///< Max TBS in Rel13 NB-IoT
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#define SRSRAN_NPDSCH_CRC_LEN (24)
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#define SRSRAN_NPDSCH_MAX_TBS_CRC (SRSRAN_NPDSCH_MAX_TBS + SRSRAN_NPDSCH_CRC_LEN)
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#define SRSRAN_NPDSCH_MAX_TBS_ENC (3 * SRSRAN_NPDSCH_MAX_TBS_CRC)
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#define SRSRAN_NPDSCH_MAX_NOF_SF 10
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#define SRSRAN_NPDSCH_NUM_SEQ (2 * SRSRAN_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 SRSRAN_API {
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srsran_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[SRSRAN_NPDSCH_MAX_TBS_CRC];
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uint8_t data_enc[SRSRAN_NPDSCH_MAX_TBS_ENC];
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float rm_f[SRSRAN_NPDSCH_MAX_TBS_ENC];
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cf_t* ce[SRSRAN_MAX_PORTS];
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cf_t* symbols[SRSRAN_MAX_PORTS];
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cf_t* sib_symbols[SRSRAN_MAX_PORTS]; // extra buffer for SIB1 symbols as they may be interleaved with other NPDSCH
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cf_t* tx_syms[SRSRAN_MAX_PORTS]; // pointer to either symbols or sib1_symbols
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cf_t* x[SRSRAN_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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srsran_modem_table_t mod;
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srsran_viterbi_t decoder;
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srsran_sequence_t seq[SRSRAN_NPDSCH_NUM_SEQ];
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srsran_crc_t crc;
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srsran_convcoder_t encoder;
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} srsran_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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} srsran_sys_info_block_type_1_nb_t;
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SRSRAN_API int srsran_npdsch_init(srsran_npdsch_t* q);
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SRSRAN_API void srsran_npdsch_free(srsran_npdsch_t* q);
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SRSRAN_API int srsran_npdsch_set_cell(srsran_npdsch_t* q, srsran_nbiot_cell_t cell);
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SRSRAN_API int srsran_npdsch_set_rnti(srsran_npdsch_t* q, uint16_t rnti);
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SRSRAN_API int srsran_npdsch_cfg(srsran_npdsch_cfg_t* cfg,
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srsran_nbiot_cell_t cell,
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srsran_ra_nbiot_dl_grant_t* grant,
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uint32_t sf_idx);
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SRSRAN_API int srsran_npdsch_encode(srsran_npdsch_t* q,
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srsran_npdsch_cfg_t* cfg,
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srsran_softbuffer_tx_t* softbuffer,
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uint8_t* data,
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cf_t* sf_symbols[SRSRAN_MAX_PORTS]);
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SRSRAN_API int srsran_npdsch_encode_rnti_idx(srsran_npdsch_t* q,
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srsran_npdsch_cfg_t* cfg,
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srsran_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[SRSRAN_MAX_PORTS]);
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SRSRAN_API int srsran_npdsch_encode_rnti(srsran_npdsch_t* q,
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srsran_npdsch_cfg_t* cfg,
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srsran_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[SRSRAN_MAX_PORTS]);
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SRSRAN_API int srsran_npdsch_encode_seq(srsran_npdsch_t* q,
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srsran_npdsch_cfg_t* cfg,
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srsran_softbuffer_tx_t* softbuffer,
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uint8_t* data,
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srsran_sequence_t* seq,
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cf_t* sf_symbols[SRSRAN_MAX_PORTS]);
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SRSRAN_API int srsran_npdsch_decode(srsran_npdsch_t* q,
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srsran_npdsch_cfg_t* cfg,
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srsran_softbuffer_rx_t* softbuffer,
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cf_t* sf_symbols,
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cf_t* ce[SRSRAN_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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SRSRAN_API int srsran_npdsch_decode_rnti(srsran_npdsch_t* q,
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srsran_npdsch_cfg_t* cfg,
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srsran_softbuffer_rx_t* softbuffer,
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cf_t* sf_symbols,
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cf_t* ce[SRSRAN_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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SRSRAN_API int
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srsran_npdsch_rm_and_decode(srsran_npdsch_t* q, srsran_npdsch_cfg_t* cfg, float* softbits, uint8_t* data);
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SRSRAN_API int
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srsran_npdsch_cp(srsran_npdsch_t* q, cf_t* input, cf_t* output, srsran_ra_nbiot_dl_grant_t* grant, bool put);
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SRSRAN_API float srsran_npdsch_average_noi(srsran_npdsch_t* q);
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SRSRAN_API uint32_t srsran_npdsch_last_noi(srsran_npdsch_t* q);
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SRSRAN_API void srsran_npdsch_sib1_pack(srsran_cell_t* cell, srsran_sys_info_block_type_1_nb_t* sib, uint8_t* payload);
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SRSRAN_API void srsran_npdsch_sib1_unpack(uint8_t* const msg, srsran_sys_info_block_type_1_nb_t* sib);
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#endif // SRSRAN_NPDSCH_H
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