public void FFT_TestMethod3()
{
FastFourierTransform FFT = new FastFourierTransform();
// test case 2
List <float> Samples = new List <float> {
1, 3, 5, 7, 9, 11, 13, 15
};
FFT.InputTimeDomainSignal = new DSPAlgorithms.DataStructures.Signal(Samples, false);
FFT.InputSamplingFrequency = 4;
var FrequenciesAmplitudes = new List <float> {
64, 20.9050074380220f, 11.3137084989848f, 8.65913760233915f, 8, 8.65913760233915f, 11.3137084989848f, 20.9050074380220f
};
var FrequenciesPhaseShifts = new List <float> {
0, 1.96349540849362f, 2.35619449019235f, 2.74889357189107f, -3.14159265358979f, -2.74889357189107f, -2.35619449019235f, -1.96349540849362f
};
var Frequencies = new List <float> {
0, 1, 2, 3, 4, 5, 6, 7
};
FFT.Run();
Assert.IsTrue(UnitTestUtitlities.SignalsSamplesAreEqual(FrequenciesAmplitudes, FFT.OutputFreqDomainSignal.FrequenciesAmplitudes) &&
UnitTestUtitlities.SignalsPhaseShiftsAreEqual(FrequenciesPhaseShifts, FFT.OutputFreqDomainSignal.FrequenciesPhaseShifts));
}
public void FFT_TestMethod2()
{
FastFourierTransform FFT = new FastFourierTransform();
// test case 1 ..
var sig1 = UnitTestUtitlities.LoadSignal("TestingSignals/Signal2_FFT.ds");
var expectedOutput = UnitTestUtitlities.LoadSignal("TestingSignals/Signal2_FFT_Results.ds");
FFT.InputTimeDomainSignal = sig1;
FFT.InputSamplingFrequency = 360;
FFT.Run();
Assert.IsTrue(UnitTestUtitlities.SignalsSamplesAreEqual(expectedOutput.FrequenciesAmplitudes, FFT.OutputFreqDomainSignal.FrequenciesAmplitudes) &&
UnitTestUtitlities.SignalsPhaseShiftsAreEqual(expectedOutput.FrequenciesPhaseShifts, FFT.OutputFreqDomainSignal.FrequenciesPhaseShifts));
}
public void DFTTestMethod1()
{
FastFourierTransform FFT = new FastFourierTransform();
// test case 1 ..
var sig1 = UnitTestUtitlities.LoadSignal("TestingSignals/DFT_Signal1.ds");
FFT.InputTimeDomainSignal = sig1;
FFT.InputSamplingFrequency = 4;
List <float> amplitude = new List <float> {
64, 20.9050074380220f, 11.3137084989848f, 8.65913760233915f, 8, 8.65913760233915f, 11.3137084989848f, 20.9050074380220f
};
List <float> phase = new List <float> {
0, 1.96349540849362f, 2.35619449019235f, 2.74889357189107f, 3.14159265358979f, -2.74889357189107f, -2.35619449019235f, -1.96349540849362f
};
FFT.Run();
Assert.IsTrue(UnitTestUtitlities.SignalsSamplesAreEqual(amplitude, FFT.OutputFreqDomainSignal.FrequenciesAmplitudes) && UnitTestUtitlities.SignalsSamplesAreEqual(phase, FFT.OutputFreqDomainSignal.FrequenciesPhaseShifts));
}
