DocumentCode :
769262
Title :
Adaptive Reference Echo Cancellation
Author :
Falconer, David D.
Author_Institution :
Carleton Univ., Ottawa, Ont., Canada
Volume :
30
Issue :
9
fYear :
1982
fDate :
9/1/1982 12:00:00 AM
Firstpage :
2083
Lastpage :
2094
Abstract :
The AREC (adaptive reference echo cancellation) algorithm is presented for an echo canceler used in full-duplex two-wire digital transmission on digital subscriber loops. The AREC algorithm incorporates a decision-directed estimation of and compensation for the far-end signal which is a source of interference to the conventional echo canceler adaptation algorithm. The AREC algorithm thus offers much faster convergence and shorter coefficient wordlengths than the conventional algorithm. Analysis and simulation of the performance and convergence of both AREC and conventional echo canceler adaptation algorithms are carried out. Included in the analysis is the effect of receiver delay and coefficient wordlength requirements. A simple and robust startup procedure is proposed and investigated by simulation.
Keywords :
Adaptive filters; Echo control; Subscriber networks; Transversal filters; Algorithm design and analysis; Analytical models; Convergence; DSL; Delay effects; Echo cancellers; Echo interference; Interference cancellation; Performance analysis; Robustness;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOM.1982.1095699
Filename :
1095699
Link To Document :
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