Title

Comb-Cosine Prefilter Based Decimation Filter

Publication Date

3-1-2010

Document Type

Conference Proceeding

Abstract

This paper presents a new multistage Comb-Cosine decimation filter with an improved magnitude response. The passband droop of the comb filter is decreased by using a simple 2M order compensation filter. Using multirate identity this filter can be moved to the low rate becoming a second order filter. Additionally, the attenuation in the folding bands is increased using cosine prefilters, which can also be moved to a lower rate. The first section is realized in nonrecursive form. Using the polyphase decomposition, the subfilters of the first section can be operated at a lower rate, which depends on the down-sampling factor of the first section. The resulting structure is multiplierless and does not have any filtering at the high input rate.

Publication Title

2010 IEEE International Conference on Industrial Technology

First Page

205

Last Page

210

DOI

10.1109/ICIT.2010.5472680

Version

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