sdrangel/ft8/arrays.h

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2.5 KiB
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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2023 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// //
// This is the code from ft8mon: https://github.com/rtmrtmrtmrtm/ft8mon //
// reformatted and adapted to Qt and SDRangel context //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program 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 General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef FT8_ARRAYS_H_
#define FT8_ARRAYS_H_
#include "export.h"
namespace FT8 {
class FT8_API Arrays
{
public:
//
// this is the LDPC(174,91) parity check matrix.
// each row describes one parity check.
// 83 rows.
// each number is an index into the codeword (1-origin).
// the codeword bits mentioned in each row must xor to zero.
// From WSJT-X's ldpc_174_91_c_reordered_parity.f90
//
static const int Nm[][7];
// Mn from WSJT-X's ldpc_174_91_c_reordered_parity.f90
// each of the 174 rows corresponds to a codeword bit.
// the numbers indicate which three parity
// checks (rows in Nm) refer to the codeword bit.
// 1-origin.
static const int Mn[][3];
// This is the LDPC(174, 91) generator matrix
// It has 83 rows and 91 columns (zero padded on the right thus 12 bytes)
// From WSJT-X's ldpc_174_91_c_generator.f90
static const int Gm[][12];
};
} // namespace FT8
#endif // FT8_ARRAYS_H_