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109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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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 SRSLTE_PBCH_H
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#define SRSLTE_PBCH_H
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#include "srslte/config.h"
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#include "srslte/phy/ch_estimation/chest_dl.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/fec/convcoder.h"
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#include "srslte/phy/fec/crc.h"
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#include "srslte/phy/fec/rm_conv.h"
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#include "srslte/phy/fec/viterbi.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/scrambling/scrambling.h"
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#define SRSLTE_BCH_PAYLOAD_LEN 24
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#define SRSLTE_BCH_PAYLOADCRC_LEN (SRSLTE_BCH_PAYLOAD_LEN + 16)
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#define SRSLTE_BCH_ENCODED_LEN 3 * (SRSLTE_BCH_PAYLOADCRC_LEN)
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#define SRSLTE_PBCH_MAX_RE 256 // make it avx2-aligned
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/* PBCH object */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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uint32_t nof_symbols;
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/* buffers */
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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* x[SRSLTE_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[SRSLTE_BCH_ENCODED_LEN];
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uint8_t* rm_b;
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uint8_t data[SRSLTE_BCH_PAYLOADCRC_LEN];
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uint8_t data_enc[SRSLTE_BCH_ENCODED_LEN];
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uint32_t frame_idx;
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/* tx & rx objects */
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srslte_modem_table_t mod;
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srslte_sequence_t seq;
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srslte_viterbi_t decoder;
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srslte_crc_t crc;
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srslte_convcoder_t encoder;
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bool search_all_ports;
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} srslte_pbch_t;
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SRSLTE_API int srslte_pbch_init(srslte_pbch_t* q);
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SRSLTE_API void srslte_pbch_free(srslte_pbch_t* q);
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SRSLTE_API int srslte_pbch_set_cell(srslte_pbch_t* q, srslte_cell_t cell);
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SRSLTE_API int srslte_pbch_decode(srslte_pbch_t* q,
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srslte_chest_dl_res_t* channel,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS],
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uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
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uint32_t* nof_tx_ports,
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int* sfn_offset);
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SRSLTE_API int srslte_pbch_encode(srslte_pbch_t* q,
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uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN],
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cf_t* sf_symbols[SRSLTE_MAX_PORTS],
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uint32_t frame_idx);
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SRSLTE_API void srslte_pbch_decode_reset(srslte_pbch_t* q);
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SRSLTE_API void srslte_pbch_mib_unpack(uint8_t* msg, srslte_cell_t* cell, uint32_t* sfn);
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SRSLTE_API void srslte_pbch_mib_pack(srslte_cell_t* cell, uint32_t sfn, uint8_t* msg);
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#endif // SRSLTE_PBCH_H
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