Fast unbiased echo canceller update during ADSL transmission

Author

Milosevic, Milos ; Inoue, Takao ; Molnar, Peter ; Evans, Brian L.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Texas, Austin, TX, USA

Volume

51

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

561

Lastpage

565

Abstract

This paper presents an efficient method for updating echo canceller (EC) coefficients in asymmetric digital subscriber line transceivers during transmission that removes the dependency of updates on the far-end signal. The new method improves on the frequency-domain EC architecture by Ho et al. (1996), in that it converges faster, improves the stability to perturbation, and is not prone to bias from pilot tones. The new EC updating system architecture is presented for both the central office and remote terminal systems and is fully compliant with the ITU-T G.DMT standard.

Keywords

digital subscriber lines; echo suppression; telecommunication standards; transceivers; ADSL transmission; ITU-T G.DMT standard; asymmetric digital subscriber line transceivers; central office architecture; echo canceller coefficients updating; echo canceller updating system architecture; far-end signal; frequency-domain EC architecture; multicarrier modulation; perturbation stability; pilot tones; remote terminal systems; unbiased echo canceller update; ANSI standards; Bandwidth; Central office; DSL; Echo cancellers; OFDM modulation; Signal to noise ratio; Stability; Telecommunication standards; Transceivers;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2003.810868

Filename

1199280