Summary
Computes the group delay of IIR filters.
Unit
SignalUtils
Declaration
Procedure GroupDelay(GrpDelay, Num: TVec; Den: TVec = nil; ZeroPadding: integer = 1);
Description
Num holds the numerator and Den the denominator of the transfer function for which the group delay should be computed. Den can be nil. Zeropadding defines the amount of zero padding applied with FFT. The result is placed in GrpDelay. Group delay is the first derivate of continuous phase: g = (d/dw)Phase, where w is the frequency ([1] p. 201).
Categories
IIR Filters| See Also |
|---|
| [1] "Understanding digital signal processing.", Richard G. Lyons, Prentice-Hall, 2001. "Advanced sampling techniques". |
| FrequencyResponse |
| PhaseUnwrap |
| Copyright 2008 Dew Research |
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