DocumentCode
925648
Title
Bias reduction in acoustic feedback cancellation systems with varying all-pass filters
Author
Boukis, C. ; Mandic, D.P. ; Constantinides, A.G.
Author_Institution
Athens Inf. Technol., AGC Group, Peania, Greece
Volume
42
Issue
9
fYear
2006
fDate
4/27/2006 12:00:00 AM
Firstpage
556
Lastpage
558
Abstract
A method for the minimisation of the bias in closed-loop system identification is presented. This is achieved using all-pass filters with time-varying poles within the forward path, which aims at decorrelating the input and the output signal. An analysis of the proposed method and expressions for the input-output correlation in the steady state are provided. Comprehensive simulations are given to support the proposed approach whereby misalignment curves are compared to those obtained with the use of simple delays.
Keywords
acoustic signal processing; all-pass filters; closed loop systems; hearing aids; minimisation; time-varying filters; acoustic feedback cancellation systems; all-pass filters; bias reduction; closed-loop system identification; hearing aids; input-output correlation; minimisation method; misalignment curves; time-varying poles;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20060470
Filename
1628549
Link To Document