Data-driven echo cancellation for a multitone modulation system

Author

Yang, J. ; Roy, S. ; Lewis, N.H.

Author_Institution

Dept. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA

Volume

42

Issue

5

fYear

1994

fDate

5/1/1994 12:00:00 AM

Firstpage

2134

Lastpage

2144

Abstract

The problem of echo cancellation in a multitone modulation (MTM) scheme is addressed. A general model for the near-end echo is derived and is used to identify candidate data-driven echo canceller (DDEC) structures. The stability, steady state performance, and associated system complexity of an adaptive DDEC based on the stochastic gradient approach is developed. It is further shown how the symmetry in the derived echo path model can be exploited to enable a reduction in canceller complexity, enhancing convergence speed without sacrificing final SNR. Simulation results are provided that confirm the analytical predictions

Keywords

echo suppression; modulation; telecommunication equipment; SNR; adaptive DDEC; convergence speed; data-driven echo cancellation; echo path model; multitone modulation system; near-end echo; simulation results; stability; steady state performance; stochastic gradient; system complexity; Convergence; Data communication; Echo cancellers; Frequency; Interchannel interference; Intersymbol interference; Modems; Stability; Steady-state; Stochastic systems;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.285149

Filename

285149