Title :
Polyphase analysis of subband adaptive filters
Author :
Weiss, Stephan ; Stewart, Robert W. ; Harteneck, Moritz ; Stenger, Alexander
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
Based on a polyphase analysis of a subband adaptive filter (SAF) system, it is possible to calculate the optimum subband impulse responses to which the SAF system will converge. We give some insight into how these optimum impulse responses are calculated, and discuss two applications of our technique. Firstly, the performance limitations of an SAF system can be explored with respect to the minimum mean square error performance. Secondly, fullband impulse responses can be correctly projected into the subband domain, which is required for example for translating constraints for subband adaptive beamforming. Examples for both applications are presented.
Keywords :
adaptive filters; adaptive signal processing; array signal processing; filtering theory; mean square error methods; optimisation; transient response; fullband impulse responses; minimum mean square error performance; optimum subband impulse responses; performance limitations; polyphase analysis; subband adaptive beamforming; subband adaptive filters; subband domain; Acoustics; Adaptive filters; Array signal processing; Band pass filters; Error analysis; Filter bank; Frequency; Performance analysis; Signal synthesis; System identification;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.831840
