Abstract
A simple analytic design procedure for bireciprocal lattice wave digital filters (bireciprocal LWDFs) is presented with approximate linear phase. The design is started by replacing the odd order all-pass filter branch in the bireciprocal LWDF with a pure delay, leaving the other branch as an all-pass even function of z -2. Analytic design procedure is then formulated. Several design examples using such procedure are given for verifications. Keywords: Bireciprocal LWDFs, All-pass sections, Half-band filters, Approximate linear phase.
Highlights
A wave digital filter (WDF) is the digital counterpart of a corresponding analogue filter in the analogue reference domain
The design is started by replacing the odd order all-pass filter branch in the bireciprocal lattice wave digital filters (LWDFs) with a pure delay, leaving the other branch as an all-pass even function of z -2
This makes the design of WDFs be basically carried out in the analogue domain using classical filter approximations followed by the application of certain analogue to digital transformations rules [1]
Summary
A wave digital filter (WDF) is the digital counterpart of a corresponding analogue filter in the analogue reference domain. An Analytical Design Procedure For Bireciprocal Lattice Wave Digital Filters With Approximate Linear Phase A simple analytic design procedure for bireciprocal lattice wave digital filters (bireciprocal LWDFs) is presented with approximate linear phase.
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