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52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
11 years ago
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/*
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* Copyright (c) 2013, Ismael Gomez-Miguelez <gomezi@tcd.ie>.
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* This file is part of OSLD-lib (http://https://github.com/ismagom/osld-lib)
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*
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* OSLD-lib is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OSLD-lib 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MODEM_TABLE_
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#define MODEM_TABLE_
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#include <stdbool.h>
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#include <complex.h>
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#include <stdint.h>
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typedef _Complex float cf;
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typedef struct {
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int idx[2][6][32];
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}soft_table_t;
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typedef struct {
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cf* symbol_table; // bit-to-symbol mapping
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soft_table_t soft_table; // symbol-to-bit mapping (used in soft demodulating)
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int nsymbols; // number of modulation symbols
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int nbits_x_symbol; // number of bits per symbol
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}modem_table_t;
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// Modulation standards
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enum modem_std {
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LTE_BPSK, LTE_QPSK, LTE_QAM16, LTE_QAM64
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};
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void modem_table_init(modem_table_t* q);
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void modem_table_free(modem_table_t* q);
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void modem_table_reset(modem_table_t* q);
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int modem_table_set(modem_table_t* q, cf* table, soft_table_t *soft_table, int nsymbols, int nbits_x_symbol);
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int modem_table_std(modem_table_t* q, enum modem_std table, bool compute_soft_demod);
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#endif
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