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100 lines
3.2 KiB
C
100 lines
3.2 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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/******************************************************************************
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* File: pbch.h
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*
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* Description: Physical broadcast channel. If cell.nof_ports = 0, the number
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* of ports is blindly determined using the CRC of the received
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* codeword for 1, 2 and 4 ports
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.6
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*****************************************************************************/
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#ifndef SRSRAN_PBCH_H
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#define SRSRAN_PBCH_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/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_BCH_PAYLOAD_LEN 24
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#define SRSRAN_BCH_PAYLOADCRC_LEN (SRSRAN_BCH_PAYLOAD_LEN + 16)
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#define SRSRAN_BCH_ENCODED_LEN 3 * (SRSRAN_BCH_PAYLOADCRC_LEN)
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#define SRSRAN_PBCH_MAX_RE 256 // make it avx2-aligned
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/* PBCH object */
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typedef struct SRSRAN_API {
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srsran_cell_t cell;
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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_BCH_ENCODED_LEN];
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uint8_t* rm_b;
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uint8_t data[SRSRAN_BCH_PAYLOADCRC_LEN];
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uint8_t data_enc[SRSRAN_BCH_ENCODED_LEN];
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uint32_t frame_idx;
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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_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_pbch_t;
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SRSRAN_API int srsran_pbch_init(srsran_pbch_t* q);
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SRSRAN_API void srsran_pbch_free(srsran_pbch_t* q);
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SRSRAN_API int srsran_pbch_set_cell(srsran_pbch_t* q, srsran_cell_t cell);
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SRSRAN_API int srsran_pbch_decode(srsran_pbch_t* q,
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srsran_chest_dl_res_t* channel,
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cf_t* sf_symbols[SRSRAN_MAX_PORTS],
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uint8_t bch_payload[SRSRAN_BCH_PAYLOAD_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_pbch_encode(srsran_pbch_t* q,
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uint8_t bch_payload[SRSRAN_BCH_PAYLOAD_LEN],
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cf_t* sf_symbols[SRSRAN_MAX_PORTS],
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uint32_t frame_idx);
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SRSRAN_API void srsran_pbch_decode_reset(srsran_pbch_t* q);
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SRSRAN_API void srsran_pbch_mib_unpack(uint8_t* msg, srsran_cell_t* cell, uint32_t* sfn);
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SRSRAN_API void srsran_pbch_mib_pack(srsran_cell_t* cell, uint32_t sfn, uint8_t* msg);
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#endif // SRSRAN_PBCH_H
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