/// <summary>
/// Generates transfer function.
/// </summary>
/// <param name="frequencyLow">Normalized low cutoff frequency in range [0..0.5]</param>
/// <param name="frequencyHigh">Normalized high cutoff frequency in range [0..0.5]</param>
/// <param name="order">Filter order</param>
/// <param name="ripple">Ripple (in dB)</param>
private static TransferFunction MakeTf(double frequencyLow, double frequencyHigh, int order, double ripple = 0.1)
{
return(DesignFilter.IirBpTf(frequencyLow,
frequencyHigh,
PrototypeChebyshevII.Poles(order, ripple),
PrototypeChebyshevII.Zeros(order)));
}
/// <summary>
/// Generates transfer function.
/// </summary>
/// <param name="frequency">Normalized cutoff frequency in range [0..0.5]</param>
/// <param name="order">Filter order</param>
/// <param name="ripple">Ripple (in dB)</param>
private static TransferFunction MakeTf(double frequency, int order, double ripple = 0.1)
{
return(DesignFilter.IirLpTf(frequency, PrototypeChebyshevII.Poles(order, ripple)));
}
