Sharpened comb decimator with improved magnitude response

Author

Jovanovic-Dolecek, Gordana ; Mitra, Sanjit K.

Author_Institution

Dept. of Electron., Instituto Nacional de Astrofisica, Opt. y Electron., Puebla, Mexico

Volume

2

fYear

2004

fDate

17-21 May 2004

Abstract

A new structure for the realization of a comb decimation filter with a sharpened magnitude response is advanced. The proposed structure consists of two main sections: a comb section and a sharpening comb section with the latter section operating at a lower rate than the high input rate. Using a polyphase decomposition, the sub-filters of the first section can also be operated at this lower rate. The improved magnitude response has been obtained by using the filter sharpening approach of J.F. Kaiser and R.W. Hamming (see IEEE Trans. on Acoustics, Speech, and Sig. Process., vol.ASSP25, p.415-22, 1977). The proposed filter has much less passband droop and better attenuation than the equivalent comb filter.

Keywords

comb filters; filtering theory; frequency response; comb decimation filter; filter sharpening; frequency response; passband droop; polyphase decomposition; sharpened comb decimator; sharpened magnitude response; sharpening comb section; Attenuation; Energy consumption; Finite impulse response filter; Frequency; Passband; Power dissipation; Sampling methods; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-8484-9

Type

conf

DOI

10.1109/ICASSP.2004.1326411

Filename

1326411