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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
// ------------------------------------------------------------------------------
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// np_qpc.h
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// Q-Ary Polar Codes encoding/decoding functions
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//
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// (c) 2024 - Nico Palermo, IV3NWV - Microtelecom Srl, Italy
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// ------------------------------------------------------------------------------
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//
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// This source is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// This file 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this source distribution.
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// If not, see <http://www.gnu.org/licenses/>.
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#ifndef _np_qpc_h_
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#define _np_qpc_h_
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#define QPC_LOG2N 7 // log2(codeword length) (not punctured)
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#define QPC_N (1<<QPC_LOG2N) // codeword length (not punctured)
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#define QPC_LOG2Q 7 // bits per symbol
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#define QPC_Q (1<<QPC_LOG2Q) // alphabet size
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#define QPC_K 50 // number of information symbols
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typedef struct {
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int n; // codeword length (unpunctured)
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int np; // codeword length (punctured)
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int k; // number of information symbols
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int q; // alphabet size
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int xpos[QPC_N]; // info symbols mapping/demapping tables
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unsigned char f[QPC_N]; // frozen symbols values
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unsigned char fsize[QPC_N]; // frozen symbol flag (fsize==0 => frozen)
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} qpccode_ds;
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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void qpc_encode(unsigned char* y, const unsigned char* x);
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void qpc_decode(unsigned char* xdec, unsigned char* ydec, float* py);
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unsigned char* _qpc_encode(unsigned char* y, unsigned char* x);
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void _qpc_decode(unsigned char* xdec, unsigned char* ydec,
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const float* py, const unsigned char* f, const unsigned char* fsize,
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const int numrows);
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extern qpccode_ds qpccode;
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#ifdef __cplusplus
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}
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#endif
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#endif // _np_qpc_h_
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