Re: Can a LPF have linear phase when the impuse response is not symmetric?
- From: Randy Yates <yates@xxxxxxxx>
- Date: Mon, 31 Mar 2008 07:21:40 -0400
Andor <andor.bariska@xxxxxxxxx> writes:
[...]
However, for FIR filters with real coefficients, symmetry or anti-
symmetry are necessary and sufficient for the filter to have linear
phase response.
Did you mean "...causality and symmetry or antisymmetry are necessary
and sufficient..."? Otherwise I would disagree, a simple counterexample
being any fractional-sample-delayed version of a sinc() signal with
bandwidth less than or equal to Fs/2.
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