/// <summary>
/// Does simple amplitude demodulation of <paramref name="signal"/> based on Hilbert transform.
/// </summary>
public static DiscreteSignal DemodulateAmplitude(DiscreteSignal signal)
{
var ht = new HilbertTransform(signal.Length);
var mag = ht.AnalyticSignal(signal.Samples).Magnitude;
return(new DiscreteSignal(signal.SamplingRate, mag.ToFloats()) - 1.0f);
}
/// <summary>
/// Does simple frequency demodulation pf <paramref name="signal"/> based on Hilbert transform.
/// </summary>
public static DiscreteSignal DemodulateFrequency(DiscreteSignal signal)
{
var diff = new float[signal.Length];
MathUtils.Diff(signal.Samples, diff);
var ht = new HilbertTransform(signal.Length);
var mag = ht.AnalyticSignal(diff).Magnitude;
return(new DiscreteSignal(signal.SamplingRate, mag.ToFloats()) - 1.0f);
}