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/*!
* \file
* \brief Reed-Solomon encoder/decoder class test program
* \author Steve Peters and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* IT++ - C++ library of mathematical, signal processing, speech processing,
* and communications classes and functions
*
* Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)
*
* 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; either version 2 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* -------------------------------------------------------------------------
*/
#include <itpp/itcomm.h>
using namespace itpp;
using std::cout;
using std::endl;
int main()
{
cout << "==========================================" << endl;
cout << " Test of Reed-Solomon encoder/decoder " << endl;
cout << "==========================================" << endl;
bmat u = randb(8, 15);
bmat c(u.rows(), 21);
bmat y(u.rows(), 21);
bvec codeword, errorword;
bmat decoded(u.rows(), u.cols());
Reed_Solomon rs(3, 1);
Reed_Solomon rs_sys(3, 1, true);
bmat f = "1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0; 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0; 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0; 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1; 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0";
cout << "Non-systematic case" << endl;
cout << "-------------------" << endl;
for (int i = 0; i < u.rows(); i++) {
cout << "Info word: " << u.get_row(i) << endl;
codeword = rs.encode(u.get_row(i));
it_assert(c.cols() == length(codeword), "Error 1");
c.set_row(i, rs.encode(u.get_row(i)));
cout << "Encoded: " << c.get_row(i) << endl;
errorword = f.get_row(i) + c.get_row(i);
it_assert(y.cols() == length(errorword), "Error 2");
y.set_row(i,f.get_row(i) + c.get_row(i));
cout << "One error added: " << y.get_row(i) << endl;
decoded.set_row(i,rs.decode(y.get_row(i)));
cout << "Decoded to: " << decoded.get_row(i) << endl << endl;
}
cout << "Systematic case" << endl;
cout << "---------------" << endl;
for (int i = 0; i < u.rows(); i++) {
c.set_row(i,rs_sys.encode(u.get_row(i)));
cout << "Info word: " << u.get_row(i) << endl;
cout << "Encoded: " << c.get_row(i) << endl;
y.set_row(i,f.get_row(i) + c.get_row(i));
cout << "One error added: " << y.get_row(i) << endl;
decoded.set_row(i,rs_sys.decode(y.get_row(i)));
cout << "Decoded to: " << decoded.get_row(i) << endl << endl;
}
return 0;
}
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