France Telecom

Groupe Des Ecoles Des Telecommunications (enst Bretagne)

Joël Labat

Christophe Laot

An equalizer device is used for digital communications systems having a plurality of receive channels. The equalizer device in normal operation comprises a transversal filter for each receive channel, an adder for summing the receive channels, and a system downstream from the adder including a phase corrector and a recursive portion including a single recursive filter and decision circuit in its forward branch. The equalizer device including decision-taking circuit for evaluating its performance as a function of the output signal from the equalizer device and for responding to the result of this evaluation by switching from a first structure which corresponds to a normal mode of operation to a second structure which corresponds to a convergence mode of operation, and vice versa.

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Plougastel, France

Joël Labat