Study of adaptive nonlinear echo canceller with Volterra expansion

Jiande Chen, Joos Vandewalle

Research output: Contribution to journalConference articlepeer-review

Abstract

A nonlinear echo canceller with Volterra series expansion is presented. A model of the data transmission system is used to study its performance. It is shown that the Volterra expansion method is a good solution to the problem of nonlinear echo cancellation. To sufficiently reduce the nonlinearities caused by A/D and D/A (analog/digital and digital/analog) converters, an adaptive third-order Volterra filter with a nonlinear memory of length 3 can be applied. The far-end signal has a very strong influence on the canceller. To reduce this, a training sequence without a far-end signal is used, and different values of the step-size μ are chosen for the transient period (larger μ) and for the steady state. Simulations have shown that the canceller can achieve 15-dB improvement with a training sequence and 8-dB improvement without the training sequence.

Original languageEnglish (US)
Pages (from-to)1376-1379
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume2
StatePublished - Dec 1 1989
Externally publishedYes
Event1989 International Conference on Acoustics, Speech, and Signal Processing - Glasgow, Scotland
Duration: May 23 1989May 26 1989

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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