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/*!
* \file
* \brief STC class test program
* \author Bogdan Cristea
*
* -------------------------------------------------------------------------
*
* Copyright (C) 1995-2013 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ 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 3 of the License, or (at your option) any
* later version.
*
* IT++ 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 IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "itpp/itcomm.h"
#include "gtest/gtest.h"
//returns true if the absolute difference of all elements of matrices is below err
bool near(const itpp::cmat &M1, const itpp::cmat &M2, double err)
{
if (M1.rows() != M2.rows() || M1.cols() != M2.cols())
{
return false;
}
int n, k;
for (n = 0; n < M1.rows(); ++n)
{
for (k = 0; k < M1.cols(); ++k)
{
if (std::abs(M1(n,k)-M2(n,k)) >= err)
{
return false;
}
}
}
return true;
}
TEST(STC, All)
{
int em_antenna = 2;
int channel_uses = 2;
const int const_size = 4;//QAM
const double abs_err = 1e-12;
// Checking V-BLAST
std::string code_name("V-BLAST_MxN");
//should succeed
itpp::STC stc(code_name, const_size, em_antenna, channel_uses);
//check parameters
ASSERT_EQ(2, stc.get_nb_emission_antenna());
ASSERT_EQ(2, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
//check generated matrices
itpp::cmat ref_vblast("1 0; 0 0; 0 1; 0 0; 0 0; 1 0; 0 0; 0 1");
ASSERT_TRUE(near(ref_vblast, stc.get_1st_gen_matrix(), abs_err));
ASSERT_TRUE(near(ref_vblast, stc.get_2nd_gen_matrix(), abs_err));
// Checking improved V-BLAST
code_name = "imp_V-BLAST_MxN";
//should succeed
stc.setup(code_name, const_size, em_antenna, channel_uses);
//check parameters
ASSERT_EQ(2, stc.get_nb_emission_antenna());
ASSERT_EQ(2, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
//check generated matrices
itpp::cmat ref_imp_vblast("1 0; 0 1; 0 1; 1 0; 1 0; 0 -1; 0 1; -1 0");
ref_imp_vblast /= std::sqrt(2.0);
ASSERT_TRUE(near(ref_imp_vblast, stc.get_1st_gen_matrix(), abs_err));
ASSERT_TRUE(near(ref_imp_vblast, stc.get_2nd_gen_matrix(), abs_err));
// Checking Alamouti code
code_name = "Alamouti_2xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(2, stc.get_nb_emission_antenna());
ASSERT_EQ(2, stc.get_channel_uses());
ASSERT_EQ(2, stc.get_nb_symbols_per_block());
//check generated matrices
itpp::cmat ref_A("1 0; 0 1; 0 1; -1 0");
itpp::cmat ref_B("1 0; 0 -1; 0 1; 1 0");
ASSERT_TRUE(near(ref_A, stc.get_1st_gen_matrix(), abs_err));
ASSERT_TRUE(near(ref_B, stc.get_2nd_gen_matrix(), abs_err));
// Checking switched Alamouti code
code_name = "Switched_Alamouti_4xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(4, stc.get_nb_emission_antenna());
ASSERT_EQ(4, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
// Checking double Alamouti code
code_name = "Double_Alamouti_4xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(4, stc.get_nb_emission_antenna());
ASSERT_EQ(2, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
// Checking Jafarkhani code
code_name = "Jafarkhani_4xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(4, stc.get_nb_emission_antenna());
ASSERT_EQ(4, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
// Checking Golden code
code_name = "Golden_2x2";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(2, stc.get_nb_emission_antenna());
ASSERT_EQ(2, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
// Checking Damen code
code_name = "Damen_2x2";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(2, stc.get_nb_emission_antenna());
ASSERT_EQ(2, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
// Checking orthogonal code 3xN
code_name = "34ortho_3xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(3, stc.get_nb_emission_antenna());
ASSERT_EQ(4, stc.get_channel_uses());
ASSERT_EQ(3, stc.get_nb_symbols_per_block());
// Checking 36 LD code 3xN
code_name = "36LD_3xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(3, stc.get_nb_emission_antenna());
ASSERT_EQ(4, stc.get_channel_uses());
ASSERT_EQ(4, stc.get_nb_symbols_per_block());
// Checking 37 LD code 3xN
code_name = "37LD_3xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(3, stc.get_nb_emission_antenna());
ASSERT_EQ(6, stc.get_channel_uses());
ASSERT_EQ(6, stc.get_nb_symbols_per_block());
// Checking 39 LD code 3xN
code_name = "39LD_3xN";
//should succeed
stc.setup(code_name, const_size);
//check parameters
ASSERT_EQ(3, stc.get_nb_emission_antenna());
ASSERT_EQ(6, stc.get_channel_uses());
ASSERT_EQ(6, stc.get_nb_symbols_per_block());
}
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