On the Problem of Acoustic Echo Control in Cellular Networks

Authors:

Enzner, G. ,  Krüger, H. ,  Vary, P.

Book Title:

Proceedings of International Workshop on Acoustic Echo and Noise Control (IWAENC)

Address:

Eindhoven, The Netherlands

Date:

Sep. 2005

Language:

English

Abstract

If acoustic echo cancelers are implemented in cellular networks, e.g., in base stations, the echo attenuation is severely degraded by the nonlinearity and/or unpredictability of the effective echo path. In this contribution, we consider a network model (or rather echo path model) which takes the statistical behavior of speech encoders into account if contained in the echo path. Using this model, we show that the optimum filter structure of network acoustic echo controllers can be derived from the theory of combined acoustic echo and noise control for hands-free telephones.

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