You are here: Symbol Reference > LinearSystems Namespace > Functions > LinearSystems.BilinearUnwarp Function
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LinearSystems.BilinearUnwarp Function
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DSP Master VCL
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Return unwarped frequency according to the bilinear transform.
function BilinearUnwarp(Freq: Double; FS: Double = 2): Double; overload;
The function returns the frequency, to which the Freq will map after the bilinear transformation has been aplied. The mapping is defined as ([1], p. 338, eq 8.28):
Result = 2*FS*tan(Pi*Freq/2);
FS defines the sampling frequency. T = 1/FS.
References:
[1] Digital signal processing, Vinay K. Ingle and John G. Proakis, Brooks-Cole, 2000
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