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An LSI Implementation of an ISDN Echo Canceller: Design and Network Aspects

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3 Author(s)
J. -O. Andersson ; Telefonaktiebolaget LM Ericsson, Stockholm, Sweden ; B. Carlqvist ; A. Bauer

This paper describes a single/chip VLSI implementation of a U -interface system component called transceiver with echo cancelling (TEC). The transceiver is implemented with the adaptive echo cancelling method and is combined with a decision feedback equalizer. The algorithms are based on the sign algorithm, but have been considerably improved by using an adaptive reference level. Besides the transceiver functions, functions for activation/deactivation, maintenance, and test are also included in the chip.

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IEEE Journal on Selected Areas in Communications  (Volume:4 ,  Issue: 8 )