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81 lines
2.4 KiB
C
81 lines
2.4 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: modem_table.h
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*
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* Description: Modem tables used for modulation/demodulation.
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* Supports BPSK, QPSK, 16QAM and 64QAM.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 7.1
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*****************************************************************************/
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#ifndef SRSLTE_MODEM_TABLE_H
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#define SRSLTE_MODEM_TABLE_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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typedef struct {
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cf_t symbol[8];
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} bpsk_packed_t;
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typedef struct {
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cf_t symbol[4];
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} qpsk_packed_t;
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typedef struct {
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cf_t symbol[2];
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} qam16_packed_t;
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typedef struct {
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cf_t symbol[256];
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} qam256_packed_t;
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typedef struct SRSLTE_API {
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cf_t* symbol_table; // bit-to-symbol mapping
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uint32_t nsymbols; // number of modulation symbols
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uint32_t nbits_x_symbol; // number of bits per symbol
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bool byte_tables_init;
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bpsk_packed_t* symbol_table_bpsk;
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qpsk_packed_t* symbol_table_qpsk;
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qam16_packed_t* symbol_table_16qam;
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qam256_packed_t* symbol_table_256qam;
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} srslte_modem_table_t;
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SRSLTE_API void srslte_modem_table_init(srslte_modem_table_t* q);
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SRSLTE_API void srslte_modem_table_free(srslte_modem_table_t* q);
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SRSLTE_API void srslte_modem_table_reset(srslte_modem_table_t* q);
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SRSLTE_API int srslte_modem_table_set(srslte_modem_table_t* q, cf_t* table, uint32_t nsymbols, uint32_t nbits_x_symbol);
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SRSLTE_API int srslte_modem_table_lte(srslte_modem_table_t* q, srslte_mod_t modulation);
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SRSLTE_API void srslte_modem_table_bytes(srslte_modem_table_t* q);
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#endif // SRSLTE_MODEM_TABLE_H
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