Title
Optimal Sharpening of Compensated Comb Decimation Filters: Analysis and Design
Publication Date
2014
Document Type
Article
Abstract
Comb filters are a class of low-complexity filters especially useful for multistage decimation processes. However, the magnitude response of comb filters presents a droop in the passband region and low stopband attenuation, which is undesirable in many applications. In this work, it is shown that, for stringent magnitude specifications, sharpening compensated comb filters requires a lower-degree sharpening polynomial compared to sharpening comb filters without compensation, resulting in a solution with lower computational complexity. Using a simple three-addition compensator and an optimization-based derivation of sharpening polynomials, we introduce an effective low-complexity filtering scheme. Design examples are presented in order to show the performance improvement in terms of passband distortion and selectivity compared to other methods based on the traditional Kaiser-Hamming sharpening and the Chebyshev sharpening techniques recently introduced in the literature.
Publication Title
The Scientific World Journal
DOI
http://dx.doi.org/10.1155/2014/950860
Publisher Policy
open access
Open Access Status
OA Journal
Recommended Citation
Laddomada, Massimiliano; Troncoso Romero, David Ernesto; and Jovanovic Dolecek, Gordana, "Optimal Sharpening of Compensated Comb Decimation Filters: Analysis and Design" (2014). School of Engineering and Technology Publications. 151.
https://digitalcommons.tacoma.uw.edu/tech_pub/151