You are here: Symbol Reference > LinearSystems Namespace > Functions > LinearSystems.BilinearPrewarp Function
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LinearSystems.BilinearPrewarp Function
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DSP Master VCL
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Returns prewarped frequency according to the bilinear transform.
function BilinearPrewarp(Freq: Double; FS: Double = 2): Double; overload;
The function returns the frequency, which will map to Freq after the bilinear transformation has been aplied. The mapping is defined as ([1], p. 338, eq 8.28):
Result = (2/Pi)*ArcTan(Freq/(2*FS));
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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