Sharpening of non-recursive comb decimation structure

This paper proposes the application of the improved sharpening technique to a non-recursive comb decimation filter, where the decimation factor M is a power of two. The goal is to improve simultaneously the Worst-Case Passband (WCP) and Worst-Case Attenuation (WCA). The coefficients of the sharpenin...

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Bibliographic Details
Published in2013 13th International Symposium on Communications and Information Technologies (ISCIT) pp. 458 - 463
Main Authors Cruz Jimenez, Miriam Guadalupe, Calderon Reyes, Vanessa, Jovanovic Dolecek, Gordana
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2013
Subjects
Attenuation
CIC filter
comb filter
Computational complexity
decimation
Finite impulse response filters
non-recursive structure
Passband
Polynomials
Power demand
sharpening
Transfer functions
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DOI10.1109/ISCIT.2013.6645902

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Summary:This paper proposes the application of the improved sharpening technique to a non-recursive comb decimation filter, where the decimation factor M is a power of two. The goal is to improve simultaneously the Worst-Case Passband (WCP) and Worst-Case Attenuation (WCA). The coefficients of the sharpening polynomials are expressed as Sum of Power of Two (SPT), leading to a multiplierless structure with a non-significant increase of amount of Additions Per Output Sample (APOS). The resulting filter has a higher attenuation in its first folding band (where the worst-case attenuation occurs) and a droop-compensated passband. Included examples prove the efficiency of the method.
DOI:10.1109/ISCIT.2013.6645902