You are here: Symbol Reference > Dew Namespace > Dew.Signal Namespace > Dew.Signal.Units Namespace > Classes > LinearSystems Class > LinearSystems Methods > LowpassToBandstop Method > LinearSystems.LowpassToBandstop Method ([In] TVec, [In] TVec, double, double, double)
Dew Signal for .NET
ContentsIndexHome
PreviousUpNext
LinearSystems.LowpassToBandstop Method ([In] TVec, [In] TVec, double, double, double)
LinearSystems Class  LinearSystems Members  Dew.Signal.Units Namespace  LowpassToBandstop Method
Collapse All

Frequency transformation from a lowpass to a bandstop filter in s-domain.

Syntax
C#
Visual Basic
public static void LowpassToBandstop([In] TVec z, [In] TVec p, ref double k, double CenterFreq, double BW);
Remarks

Transform a lowpass filter prototype in zero-pole form to a bandstop filter, where the stopband has width BW centered around the frequency CenterFreq. Assumed sampling frequency is 2. The transformation is defined as ([1], p. 258):

s(Wu - Wl) s --> ------------- s^2 + Wu*Wl Wl - lower cutoff frequency Wu - upper cutoff frequency

The routine also adds pairs of zeros at +/-j*CenterFreq, if the number of zeros is less then number of poles, to match the number of poles. 

References:  

[1] Theory and application of digital signal processing, Lawrence R. Rabiner and Bernard Gold. Prentice-Hall, 1975

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