mirror of https://github.com/PentHertz/srsLTE.git
104 lines
2.6 KiB
C
104 lines
2.6 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_PSBCH_H
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#define SRSRAN_PSBCH_H
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#include "srsran/phy/common/phy_common_sl.h"
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#include "srsran/phy/dft/dft_precoding.h"
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#include "srsran/phy/fec/convolutional/convcoder.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/modem/demod_soft.h"
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#include "srsran/phy/modem/modem_table.h"
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#include "srsran/phy/scrambling/scrambling.h"
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#define SRSRAN_SL_BCH_CRC_LEN 16
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/**
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* \brief Physical Sidelink broadcast channel.
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*
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* Reference: 3GPP TS 36.211 version 15.6.0 Release 15 Sec. 9.6
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*/
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typedef struct SRSRAN_API {
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uint32_t N_sl_id;
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srsran_sl_tm_t tm;
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srsran_cp_t cp;
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uint32_t nof_data_re; ///< Number of RE considered during the channel mapping
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uint32_t nof_tx_re; ///< Number of RE actually transmitted over the air (without last OFDM symbol)
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uint32_t E;
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uint32_t Qm;
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uint32_t nof_prb;
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uint32_t nof_data_symbols;
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uint32_t nof_tx_symbols;
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uint32_t sl_bch_tb_len;
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uint32_t sl_bch_tb_crc_len;
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uint32_t sl_bch_encoded_len;
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float precoding_scaling;
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// data
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uint8_t* c;
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// crc
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srsran_crc_t crc_mib_sl;
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uint8_t* crc_temp;
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// channel coding
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srsran_viterbi_t dec;
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srsran_convcoder_t encoder;
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uint8_t* d;
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int16_t* d_16;
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// rate matching
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uint8_t* e;
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uint8_t* e_bytes; ///< To pack bits to bytes
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int16_t* e_16;
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uint8_t* codeword;
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uint8_t* codeword_bytes;
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int16_t* llr;
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// interleaving
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uint32_t* interleaver_lut;
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// scrambling
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srsran_sequence_t seq;
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// modulation
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srsran_modem_table_t mod;
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cf_t* mod_symbols;
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// dft precoding
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srsran_dft_precoding_t dft_precoder;
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srsran_dft_precoding_t idft_precoder;
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cf_t* scfdma_symbols;
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} srsran_psbch_t;
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SRSRAN_API int
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srsran_psbch_init(srsran_psbch_t* q, uint32_t nof_prb, uint32_t N_sl_id, srsran_sl_tm_t tm, srsran_cp_t cp);
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SRSRAN_API void srsran_psbch_free(srsran_psbch_t* q);
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SRSRAN_API int srsran_psbch_encode(srsran_psbch_t* q, uint8_t* input, uint32_t input_len, cf_t* sf_buffer);
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SRSRAN_API int srsran_psbch_decode(srsran_psbch_t* q, cf_t* scfdma_symbols, uint8_t* output, uint32_t max_output_len);
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SRSRAN_API int srsran_psbch_reset(srsran_psbch_t* q, uint32_t N_sl_id);
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SRSRAN_API int srsran_psbch_put(srsran_psbch_t* q, cf_t* symbols, cf_t* sf_buffer);
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SRSRAN_API int srsran_psbch_get(srsran_psbch_t* q, cf_t* sf_buffer, cf_t* symbols);
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#endif // SRSRAN_PSBCH_H
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