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/*!
* \file
* \brief Test program for the LLR class
* \author Erik G. Larsson
*
* -------------------------------------------------------------------------
*
* 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"
using namespace itpp;
using namespace std;
TEST(LLR, All)
{
const double tol = 1e-6;
LLR_calc_unit lcu1; // standard table resolution
LLR_calc_unit lcu2(10, 7, 9); // low table resolution
LLR_calc_unit lcu3(2, 15, 0); // low table resolution and low LLR granuality
LLR_calc_unit lcu4(10, 0, 0); // this gives logexp=logmax
ivec ref = "12 300 7";
ASSERT_TRUE(ref == lcu1.get_Dint());
ref = "10 7 9";
ASSERT_TRUE(ref == lcu2.get_Dint());
ref = "2 15 0";
ASSERT_TRUE(ref == lcu3.get_Dint());
ref = "10 0 0";
ASSERT_TRUE(ref == lcu4.get_Dint());
// Testing Jacobian logarithm with four different resolutions
mat ref_m = "0.693115 0.693359 0.75 0;"
"0.647461 0.693359 0.75 0;"
"0.60376 0.693359 0.5 0;"
"0.562256 0.693359 0.5 0;"
"0.523193 0.693359 0.5 0;"
"0.474121 0.473633 0.5 0;"
"0.439697 0.473633 0.5 0;"
"0.407471 0.473633 0.5 0;"
"0.376953 0.473633 0.5 0;"
"0.348389 0.473633 0.25 0;"
"0.313232 0.313477 0.25 0;"
"0.288818 0.313477 0.25 0;"
"0.266113 0.313477 0.25 0;"
"0.245117 0.313477 0.25 0;"
"0.225342 0.313477 0.25 0;"
"0.201416 0.201172 0.25 0;"
"0.185059 0.201172 0.25 0;"
"0.169678 0.201172 0.25 0;"
"0.155762 0.201172 0.25 0;"
"0.142578 0.201172 0.25 0;"
"0.126953 0.126953 0.25 0;"
"0.116211 0.126953 0.25 0;"
"0.106445 0.126953 0 0;"
"0.097168 0.126953 0 0;"
"0.0888672 0.126953 0 0;"
"0.0788574 0.0791016 0 0;"
"0.0720215 0.0791016 0 0;"
"0.065918 0.0791016 0 0;"
"0.0600586 0.0791016 0 0;"
"0.0549316 0.0791016 0 0;"
"0.048584 0.0488281 0 0;"
"0.0444336 0.0488281 0 0;"
"0.0405273 0.0488281 0 0;"
"0.0368652 0.0488281 0 0;"
"0.0336914 0.0488281 0 0;"
"0.0297852 0 0 0;"
"0.0270996 0 0 0;"
"0.0246582 0 0 0;"
"0.0224609 0 0 0;"
"0.0205078 0 0 0;"
"0.0180664 0 0 0;"
"0.0166016 0 0 0;"
"0.0151367 0 0 0;"
"0.0136719 0 0 0;"
"0.0124512 0 0 0;"
"0.0109863 0 0 0;"
"0.0100098 0 0 0;"
"0.00927734 0 0 0;"
"0.00830078 0 0 0;"
"0.00756836 0 0 0;"
"0.00683594 0 0 0;"
"0.00610352 0 0 0;"
"0.00561523 0 0 0;"
"0.00512695 0 0 0;"
"0.00463867 0 0 0;"
"0.00415039 0 0 0;"
"0.00366211 0 0 0;"
"0.00341797 0 0 0;"
"0.00317383 0 0 0;"
"0.00268555 0 0 0;"
"0.00244141 0 0 0;"
"0.00219727 0 0 0;"
"0.00195312 0 0 0;"
"0.00195312 0 0 0;"
"0.00170898 0 0 0;"
"0.00146484 0 0 0;"
"0.00146484 0 0 0;"
"0.0012207 0 0 0;"
"0.0012207 0 0 0;"
"0.000976562 0 0 0;"
"0.000976562 0 0 0;"
"0.000732422 0 0 0;"
"0.000732422 0 0 0;"
"0.000732422 0 0 0;"
"0.000732422 0 0 0;"
"0.000488281 0 0 0;"
"0.000488281 0 0 0;"
"0.000488281 0 0 0;"
"0.000488281 0 0 0;"
"0.000488281 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 0 0 0;"
"0.000244141 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 0 0;"
"0 0 0 0;"
"0 0 0 0;"
"0 0 0 0";
int n = 0;
for (double x = 0.0; x < 10; x += 0.1, ++n) {
ASSERT_NEAR(ref_m(n,0), lcu1.to_double(lcu1.logexp(lcu1.to_qllr(x))), tol);
ASSERT_NEAR(ref_m(n,1), lcu2.to_double(lcu2.logexp(lcu2.to_qllr(x))), tol);
ASSERT_NEAR(ref_m(n,2), lcu3.to_double(lcu3.logexp(lcu3.to_qllr(x))), tol);
ASSERT_NEAR(ref_m(n,3), lcu4.to_double(lcu4.logexp(lcu4.to_qllr(x))), tol);
}
ASSERT_NEAR(0.75, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(100.0), lcu1.to_qllr(0.75))), tol);
ASSERT_NEAR(-0.75, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(100.0), lcu1.to_qllr(-0.75))), tol);
ASSERT_NEAR(-0.75, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(-100.0), lcu1.to_qllr(0.75))), tol);
ASSERT_NEAR(0.75, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(-100.0), lcu1.to_qllr(-0.75))), tol);
ASSERT_NEAR(0, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(0.0), lcu1.to_qllr(0.75))), tol);
ASSERT_NEAR(0, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(0.0), lcu1.to_qllr(-0.75))), tol);
ASSERT_NEAR(-1.177978515625, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(3.75), lcu1.to_qllr(-1.25))), tol);
ASSERT_NEAR(-1.177978515625, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(-1.25), lcu1.to_qllr(3.75))), tol);
ASSERT_NEAR(-1.177978515625, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(-3.75), lcu1.to_qllr(1.25))), tol);
ASSERT_NEAR(-1.177978515625, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(1.25), lcu1.to_qllr(-3.75))), tol);
ASSERT_NEAR(1.177978515625, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(3.75), lcu1.to_qllr(1.25))), tol);
ASSERT_NEAR(1.177978515625, lcu1.to_double(lcu1.Boxplus(lcu1.to_qllr(1.25), lcu1.to_qllr(3.75))), tol);
}
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