A low-complexity adaptive echo canceller for xDSL applications

Author

Lin, Shou-Sheu ; Wu, Wen-Rong

Author_Institution

Dept. of Commun. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan

Volume

52

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

1461

Lastpage

1465

Abstract

A finite impulse response (FIR)-based adaptive filter structure is proposed for echo cancellation in xDSL applications. The proposed algorithm consists of an FIR filter, a cascaded interpolated FIR filter, and a tap-weight overlapping and ing scheme. This filter requires low computational complexity and inherits the stable characteristics of the conventional FIR filter. Simulations show that the proposed echo canceller can effectively cancel the echo up to 73.4 dB [for a single-pair high-speed digital subscriber line (SHDSL) system]. About 55% complexity reduction can be achieved compared with a conventional FIR filter.

Keywords

FIR filters; adaptive filters; computational complexity; digital subscriber lines; echo suppression; interpolation; FIR-based adaptive filter structure; adaptive filters; computational complexity; echo canceller; finite impulse response; ing scheme; low complexity adaptive echo canceller; single-pair high-speed digital subscriber line; tap-weight overlapping; xDSL applications; Adaptive filters; Circuits; Computational complexity; Computational modeling; DSL; Echo cancellers; Feedback loop; Finite impulse response filter; IIR filters; Tail;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/TSP.2004.826155

Filename

1284844