You are here: Symbol Reference > Dew Namespace > Dew.Signal Namespace > Dew.Signal.Units Namespace > Classes > IIRFilters Class > IIRFilters Methods > BesselFilter Method > IIRFilters.BesselFilter Method (int, [In] double[], TFilterType, bool, [In] TVec, [In] TVec, double, TIirFrequencyTransform)
Dew Signal for .NET
ContentsIndexHome
PreviousUpNext
IIRFilters.BesselFilter Method (int, [In] double[], TFilterType, bool, [In] TVec, [In] TVec, double, TIirFrequencyTransform)
IIRFilters Class  IIRFilters Members  Dew.Signal.Units Namespace  BesselFilter Method
Collapse All

Design Bessel IIR filter.

Syntax
C#
Visual Basic
public static double BesselFilter(int Order, [In] double[] CutoffFreq, TFilterType FilterType, bool Analog, [In] TVec z, [In] TVec p, ref double k, TIirFrequencyTransform IirFrequencyTransform);
Remarks

Design Bessel filter of Order with CutoffFreq frequencies and of FilterType type. Set Analog to True, to request an analog filter design in s-plane or set it to false to obtain a digital filter design in z-plane. CutoffFreq must be in range between 0 and 1 (Sampling frequency = 2). 

IIrFrequencyTransform specifies when and how will the frequency band transformation be applied. Bessel filters typically do not preserve a flat group delay once transformed to z-domain. The routine uses bilinear transformation to map from s to z-domain. Use matched-Z transform to preserve more phase properties of the Bessel filters in the z-domain. The resulting transfer function is returned in the zero-pole form, with z,p,k variables.

Group
Links
Copyright (c) 1999-2024 by Dew Research. All rights reserved.
Contents | Index | Home
What do you think about this topic? Send feedback!