Summary
Return unwarped frequency according to the bilinear transform.
Unit
LinearSystems
Declaration
Function BilinearUnwarp(Freq: TSample; FS: TSample = 2): TSample;
Description
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.
Categories
IIR filter design routines| See Also |
|---|
| [1] "Digital signal processing, Vinay K. Ingle and John G. Proakis, Brooks-Cole, 2000". |
| Bilinear |
| BilinearPrewarp |
| Copyright 2008 Dew Research |
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