mirror of https://github.com/PentHertz/srsLTE.git
153 lines
5.8 KiB
C
153 lines
5.8 KiB
C
/*
|
|
* Copyright 2013-2020 Software Radio Systems Limited
|
|
*
|
|
* This file is part of srsLTE.
|
|
*
|
|
* srsLTE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsLTE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* A copy of the GNU Affero General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
#ifndef SRSLTE_NPBCH_H
|
|
#define SRSLTE_NPBCH_H
|
|
|
|
#include "srslte/config.h"
|
|
#include "srslte/phy/common/phy_common.h"
|
|
|
|
#include "srslte/phy/fec/convcoder.h"
|
|
#include "srslte/phy/fec/crc.h"
|
|
#include "srslte/phy/fec/rm_conv.h"
|
|
#include "srslte/phy/fec/viterbi.h"
|
|
#include "srslte/phy/mimo/layermap.h"
|
|
#include "srslte/phy/mimo/precoding.h"
|
|
#include "srslte/phy/modem/demod_soft.h"
|
|
#include "srslte/phy/modem/mod.h"
|
|
#include "srslte/phy/scrambling/scrambling.h"
|
|
|
|
#define SRSLTE_MIB_NB_LEN 34
|
|
#define SRSLTE_MIB_NB_CRC_LEN (SRSLTE_MIB_NB_LEN + 16)
|
|
#define SRSLTE_MIB_NB_ENC_LEN (3 * SRSLTE_MIB_NB_CRC_LEN)
|
|
|
|
#define SRSLTE_NPBCH_NUM_RE (12 * 11 - 4 * 8) // 100 RE, entire PRB minus 3 symbols minus 4 times NRS=CRS REs
|
|
#define SRSLTE_NPBCH_NUM_BLOCKS 8 // MIB-NB is split across 8 blocks
|
|
#define SRSLTE_NPBCH_NUM_REP 8 // number of repetitions per block
|
|
#define SRSLTE_NPBCH_NUM_FRAMES (SRSLTE_NPBCH_NUM_BLOCKS * SRSLTE_NPBCH_NUM_REP)
|
|
|
|
typedef struct {
|
|
uint16_t sfn;
|
|
uint16_t hfn;
|
|
uint8_t sched_info_sib1;
|
|
uint8_t sys_info_tag;
|
|
bool ac_barring;
|
|
srslte_nbiot_mode_t mode;
|
|
} srslte_mib_nb_t;
|
|
|
|
/**
|
|
* \brief Narrowband Physical broadcast channel (NPBCH)
|
|
*
|
|
* Reference: 3GPP TS 36.211 version 13.2.0 Release 13 Sec. 10.2.4
|
|
*/
|
|
typedef struct SRS_API {
|
|
srslte_nbiot_cell_t cell;
|
|
|
|
uint32_t frame_idx;
|
|
uint32_t nof_symbols;
|
|
|
|
// buffers
|
|
cf_t* ce[SRSLTE_MAX_PORTS];
|
|
cf_t* symbols[SRSLTE_MAX_PORTS];
|
|
cf_t* x[SRSLTE_MAX_PORTS];
|
|
cf_t* d;
|
|
float* llr;
|
|
float* temp;
|
|
float rm_f[SRSLTE_MIB_NB_ENC_LEN];
|
|
uint8_t* rm_b;
|
|
uint8_t data[SRSLTE_MIB_NB_CRC_LEN];
|
|
uint8_t data_enc[SRSLTE_MIB_NB_ENC_LEN];
|
|
|
|
srslte_nbiot_mode_t op_mode;
|
|
|
|
// tx & rx objects
|
|
srslte_modem_table_t mod;
|
|
srslte_sequence_t seq;
|
|
srslte_sequence_t seq_r14[SRSLTE_NPBCH_NUM_BLOCKS];
|
|
srslte_viterbi_t decoder;
|
|
srslte_crc_t crc;
|
|
srslte_convcoder_t encoder;
|
|
bool search_all_ports;
|
|
} srslte_npbch_t;
|
|
|
|
SRSLTE_API int srslte_npbch_init(srslte_npbch_t* q);
|
|
|
|
SRSLTE_API void srslte_npbch_free(srslte_npbch_t* q);
|
|
|
|
SRSLTE_API int srslte_npbch_set_cell(srslte_npbch_t* q, srslte_nbiot_cell_t cell);
|
|
|
|
SRSLTE_API void srslte_npbch_mib_pack(uint32_t sfn, uint32_t hfn, srslte_mib_nb_t mib, uint8_t* msg);
|
|
|
|
SRSLTE_API void srslte_npbch_mib_unpack(uint8_t* msg, srslte_mib_nb_t* mib);
|
|
|
|
SRSLTE_API void srslte_mib_nb_printf(FILE* stream, srslte_nbiot_cell_t cell, srslte_mib_nb_t* mib);
|
|
|
|
SRSLTE_API int srslte_npbch_put_subframe(srslte_npbch_t* q,
|
|
uint8_t bch_payload[SRSLTE_MIB_NB_LEN],
|
|
cf_t* sf[SRSLTE_MAX_PORTS],
|
|
uint32_t frame_idx);
|
|
|
|
SRSLTE_API int srslte_npbch_encode(srslte_npbch_t* q,
|
|
uint8_t bch_payload[SRSLTE_MIB_NB_LEN],
|
|
cf_t* sf[SRSLTE_MAX_PORTS],
|
|
uint32_t frame_idx);
|
|
|
|
int srslte_npbch_rotate(srslte_npbch_t* q,
|
|
uint32_t nf,
|
|
cf_t* input_signal,
|
|
cf_t* output_signal,
|
|
int num_samples,
|
|
bool back);
|
|
|
|
SRSLTE_API int srslte_npbch_decode(srslte_npbch_t* q,
|
|
cf_t* slot1_symbols,
|
|
cf_t* ce[SRSLTE_MAX_PORTS],
|
|
float noise_estimate,
|
|
uint8_t bch_payload[SRSLTE_MIB_NB_LEN],
|
|
uint32_t* nof_tx_ports,
|
|
int* sfn_offset);
|
|
|
|
SRSLTE_API int srslte_npbch_decode_nf(srslte_npbch_t* q,
|
|
cf_t* slot1_symbols,
|
|
cf_t* ce[SRSLTE_MAX_PORTS],
|
|
float noise_estimate,
|
|
uint8_t bch_payload[SRSLTE_MIB_NB_LEN],
|
|
uint32_t* nof_tx_ports,
|
|
int* sfn_offset,
|
|
int nf);
|
|
|
|
SRSLTE_API void srslte_npbch_decode_reset(srslte_npbch_t* q);
|
|
|
|
SRSLTE_API int srslte_npbch_decode_frame(srslte_npbch_t* q,
|
|
uint32_t src,
|
|
uint32_t dst,
|
|
uint32_t n,
|
|
uint32_t nof_bits,
|
|
uint32_t nof_ports);
|
|
|
|
SRSLTE_API uint32_t srslte_npbch_crc_check(srslte_npbch_t* q, uint8_t* bits, uint32_t nof_ports);
|
|
|
|
SRSLTE_API void srslte_npbch_crc_set_mask(uint8_t* data, int nof_ports);
|
|
|
|
SRSLTE_API int srslte_npbch_cp(cf_t* input, cf_t* output, srslte_nbiot_cell_t cell, bool put);
|
|
|
|
#endif // SRSLTE_NPBCH_H
|