/** Babai's algorithm should work perfectly for Zn. This tests that it does. */
@Test
public void returnsCorrectForZn() {
System.out.println("returnsCorrectForZn");
double[] y = {1.1, 2.2, 3.9, -4.1, -100.49};
Babai babai = new Babai();
// construc the integer lattice
Zn lattice = new Zn(y.length);
babai.setLattice(lattice);
lattice.nearestPoint(y);
double[] xtrue = lattice.getLatticePoint();
double[] utrue = lattice.getIndex();
babai.nearestPoint(y);
double[] xtest = babai.getLatticePoint();
double[] utest = babai.getIndex();
System.out.println(VectorFunctions.print(xtrue));
System.out.println(VectorFunctions.print(xtest));
assertTrue(VectorFunctions.distance_between(utest, utrue) < 0.00001);
assertTrue(VectorFunctions.distance_between(xtest, xtrue) < 0.00001);
assertTrue(VectorFunctions.distance_between(utest, xtrue) < 0.00001);
assertTrue(VectorFunctions.distance_between(xtest, utrue) < 0.00001);
}
/** Test of generateReceivedSignal method, of class simulator.qam.FadingNoisyQAM. */
public void testGenerateReceivedSignal() {
System.out.println("generateReceivedSignal");
FadingNoisyQAM instance = new FadingNoisyQAM();
double[] xr = {1.0, 2.0, -2.0};
double[] xi = {1.0, -3.0, 1.0};
instance.setChannel(-0.4326, -1.6656);
RealRandomVariable noise = new pubsim.distributions.UniformNoise(0.0, 0.0);
instance.setNoiseGenerator(noise);
instance.setTransmittedSignal(xr, xi);
double[] expr = {1.2330, -5.8620, 2.5308};
double[] expi = {-2.0982, -2.0334, 2.8986};
instance.generateReceivedSignal();
System.out.println(VectorFunctions.print(instance.getInphase()));
System.out.println(VectorFunctions.print(instance.getQuadrature()));
assertEquals(true, VectorFunctions.distance_between(expr, instance.getInphase()) < 0.00001);
assertEquals(true, VectorFunctions.distance_between(expi, instance.getQuadrature()) < 0.00001);
}