Theory and performance of adaptive IIR filterbanks with variable center frequencies

Author

Plaza, David J. ; Sturim, Doug ; Weixel, James ; Coutu, Gerard

Author_Institution

United Technol. Corp., Windsor Locks, CT, USA

fYear

1993

fDate

1-3 Nov 1993

Firstpage

1543

Abstract

The theory and performance of adaptive IIR filterbanks with variable center frequencies is examined. First, the performance of a single adaptive IIR bandpass filter with fixed gain and variable center frequency is examined. The particular bandpass filter is derived from a first order Butterworth lowpass by a bilinear transformation. Next, a parallel filterbank of first order bandpass filters that cover the range up to the folding frequency is implemented. Performance error surfaces are generated. A range of frequencies are tested. The results are compared favourably with adaptive FIR filters

Keywords

adaptive filters; band-pass filters; digital filters; filtering and prediction theory; least squares approximations; LMA algorithm; adaptive IIR filterbanks; bilinear transformation; filter performance; filter theory; first order Butterworth lowpass filter; first order bandpass filters; fixed gain; folding frequency; parallel filterbank; performance error surfaces; variable center frequencies; Adaptive filters; Band pass filters; Bandwidth; Filter bank; Filtering theory; Finite impulse response filter; Frequency; IIR filters; Least squares approximation; Performance gain; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-4120-7

Type

conf

DOI

10.1109/ACSSC.1993.342354

Filename

342354