mirror of https://github.com/PentHertz/srsLTE.git
144 lines
5.3 KiB
C
144 lines
5.3 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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#ifndef SRSRAN_NPBCH_H
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#define SRSRAN_NPBCH_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/convolutional/rm_conv.h"
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#include "srsran/phy/fec/convolutional/viterbi.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/scrambling/scrambling.h"
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#define SRSRAN_MIB_NB_LEN 34
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#define SRSRAN_MIB_NB_CRC_LEN (SRSRAN_MIB_NB_LEN + 16)
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#define SRSRAN_MIB_NB_ENC_LEN (3 * SRSRAN_MIB_NB_CRC_LEN)
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#define SRSRAN_NPBCH_NUM_RE (12 * 11 - 4 * 8) // 100 RE, entire PRB minus 3 symbols minus 4 times NRS=CRS REs
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#define SRSRAN_NPBCH_NUM_BLOCKS 8 // MIB-NB is split across 8 blocks
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#define SRSRAN_NPBCH_NUM_REP 8 // number of repetitions per block
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#define SRSRAN_NPBCH_NUM_FRAMES (SRSRAN_NPBCH_NUM_BLOCKS * SRSRAN_NPBCH_NUM_REP)
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typedef struct {
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uint16_t sfn;
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uint16_t hfn;
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uint8_t sched_info_sib1;
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uint8_t sys_info_tag;
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bool ac_barring;
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srsran_nbiot_mode_t mode;
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} srsran_mib_nb_t;
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/**
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* \brief Narrowband Physical broadcast channel (NPBCH)
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*
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* Reference: 3GPP TS 36.211 version 13.2.0 Release 13 Sec. 10.2.4
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*/
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typedef struct SRS_API {
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srsran_nbiot_cell_t cell;
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uint32_t frame_idx;
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uint32_t nof_symbols;
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// buffers
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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* x[SRSRAN_MAX_PORTS];
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cf_t* d;
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float* llr;
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float* temp;
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float rm_f[SRSRAN_MIB_NB_ENC_LEN];
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uint8_t* rm_b;
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uint8_t data[SRSRAN_MIB_NB_CRC_LEN];
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uint8_t data_enc[SRSRAN_MIB_NB_ENC_LEN];
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srsran_nbiot_mode_t op_mode;
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// tx & rx objects
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srsran_modem_table_t mod;
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srsran_sequence_t seq;
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srsran_sequence_t seq_r14[SRSRAN_NPBCH_NUM_BLOCKS];
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srsran_viterbi_t decoder;
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srsran_crc_t crc;
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srsran_convcoder_t encoder;
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bool search_all_ports;
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} srsran_npbch_t;
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SRSRAN_API int srsran_npbch_init(srsran_npbch_t* q);
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SRSRAN_API void srsran_npbch_free(srsran_npbch_t* q);
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SRSRAN_API int srsran_npbch_set_cell(srsran_npbch_t* q, srsran_nbiot_cell_t cell);
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SRSRAN_API void srsran_npbch_mib_pack(uint32_t sfn, uint32_t hfn, srsran_mib_nb_t mib, uint8_t* msg);
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SRSRAN_API void srsran_npbch_mib_unpack(uint8_t* msg, srsran_mib_nb_t* mib);
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SRSRAN_API void srsran_mib_nb_printf(FILE* stream, srsran_nbiot_cell_t cell, srsran_mib_nb_t* mib);
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SRSRAN_API int srsran_npbch_put_subframe(srsran_npbch_t* q,
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uint8_t bch_payload[SRSRAN_MIB_NB_LEN],
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cf_t* sf[SRSRAN_MAX_PORTS],
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uint32_t frame_idx);
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SRSRAN_API int srsran_npbch_encode(srsran_npbch_t* q,
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uint8_t bch_payload[SRSRAN_MIB_NB_LEN],
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cf_t* sf[SRSRAN_MAX_PORTS],
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uint32_t frame_idx);
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int srsran_npbch_rotate(srsran_npbch_t* q,
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uint32_t nf,
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cf_t* input_signal,
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cf_t* output_signal,
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int num_samples,
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bool back);
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SRSRAN_API int srsran_npbch_decode(srsran_npbch_t* q,
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cf_t* slot1_symbols,
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cf_t* ce[SRSRAN_MAX_PORTS],
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float noise_estimate,
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uint8_t bch_payload[SRSRAN_MIB_NB_LEN],
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uint32_t* nof_tx_ports,
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int* sfn_offset);
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SRSRAN_API int srsran_npbch_decode_nf(srsran_npbch_t* q,
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cf_t* slot1_symbols,
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cf_t* ce[SRSRAN_MAX_PORTS],
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float noise_estimate,
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uint8_t bch_payload[SRSRAN_MIB_NB_LEN],
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uint32_t* nof_tx_ports,
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int* sfn_offset,
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int nf);
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SRSRAN_API void srsran_npbch_decode_reset(srsran_npbch_t* q);
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SRSRAN_API int srsran_npbch_decode_frame(srsran_npbch_t* q,
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uint32_t src,
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uint32_t dst,
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uint32_t n,
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uint32_t nof_bits,
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uint32_t nof_ports);
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SRSRAN_API uint32_t srsran_npbch_crc_check(srsran_npbch_t* q, uint8_t* bits, uint32_t nof_ports);
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SRSRAN_API void srsran_npbch_crc_set_mask(uint8_t* data, int nof_ports);
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SRSRAN_API int srsran_npbch_cp(cf_t* input, cf_t* output, srsran_nbiot_cell_t cell, bool put);
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#endif // SRSRAN_NPBCH_H
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