Title :
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
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;
Conference_Titel :
Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-4120-7
DOI :
10.1109/ACSSC.1993.342354
