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/*!
* \file
* \brief Vector ("MIMO") modulator classes test program
* \author Erik G. Larsson 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>
#include <iomanip>
using namespace std;
using namespace itpp;
int main()
{
cout << "========================================================" << endl;
cout << " Test of ND (MIMO) Modulators " << endl;
cout << "========================================================" << endl;
cout.setf(ios::fixed);
cout.precision(2);
RNG_reset(12345);
double sigma2 = 0.005;
double sigma = std::sqrt(sigma2);
{
ND_UPAM chan;
int nt = 5;
for (int np = 1; np <= 3; np++) {
cout << "================== ND-U" << (1<<np) << "PAM ==================\n";
chan.set_M(nt, 1<<np);
cout << chan << endl;
bvec b = randb(nt*np);
cout << b << endl;
vec x = chan.modulate_bits(b);
mat H = randn(nt, nt);
vec y = H * x + sigma * randn(nt);
QLLRvec LLR_ap = zeros_i(nt*np);
QLLRvec LLR;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR);
cout << "full channel : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR, ND_UPAM::FULL_ENUM_LOGMAP);
cout << " " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, diag(H), sigma2, LLR_ap, LLR);
cout << "diagonal channel : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR, ND_UPAM::ZF_LOGMAP);
cout << "zero-forcing : " << chan.get_llrcalc().to_double(LLR) << endl;
ivec zhat;
chan.sphere_decoding(y, H, 0.01, 10000, 2.0, zhat);
cout << zhat << endl;
}
}
{
ND_UQAM chan;
int nt = 3;
for (int np = 1; np <= 3; np++) {
cout << "================== ND-U" << ((1<<(2*np))) << "QAM ==================\n";
chan.set_M(nt, (1<<(2*np)));
cout << chan << endl;
bvec b = randb(nt*np*2);
cout << b << endl;
cvec x = chan.modulate_bits(b);
cmat H = randn_c(nt, nt);
cvec y = H * x + sigma * randn_c(nt);;
QLLRvec LLR_ap = zeros_i(2*nt*np);
QLLRvec LLR(2*nt*np);
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR);
cout << "full channel : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR, ND_UQAM::FULL_ENUM_LOGMAP);
cout << " : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, diag(H), sigma2, LLR_ap, LLR);
cout << "diagonal channel : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR, ND_UPAM::ZF_LOGMAP);
cout << "zero-forcing : " << chan.get_llrcalc().to_double(LLR) << endl;
}
}
{
ND_UPSK chan;
int nt = 3;
for (int np = 1; np <= 3; np++) {
cout << "================== ND-U" << ((1<<(2*np))) << "PSK ==================\n";
chan.set_M(nt, (1<<(2*np)));
cout << chan << endl;
bvec b = randb(nt*np*2);
cout << b << endl;
cvec x = chan.modulate_bits(b);
cmat H = randn_c(nt, nt);
cvec y = H * x + sigma * randn_c(nt);;
QLLRvec LLR_ap = zeros_i(2*nt*np);
QLLRvec LLR(2*nt*np);
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR);
cout << "full channel : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR, ND_UQAM::FULL_ENUM_LOGMAP);
cout << " : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, diag(H), sigma2, LLR_ap, LLR);
cout << "diagonal channel : " << chan.get_llrcalc().to_double(LLR) << endl;
chan.demodulate_soft_bits(y, H, sigma2, LLR_ap, LLR, ND_UPAM::ZF_LOGMAP);
cout << "zero-forcing : " << chan.get_llrcalc().to_double(LLR) << endl;
}
}
return 0;
}
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