Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Heinz Gerhafuser

Rainer Perthold

Maximilian Hofman

Ingo Rogalsky

A device for predistorting a transmission signal to be transmitted over a nonlinear transmission path comprises an estimator for determining an error signal depending on the transmission signal and a previously registered transfer characteristic of the nonlinear transmission path. The error signal represents an estimate of an error generated due to the nonlinearity of the trans-mission path. A time-dispersive element is provided to produce a correction signal by a temporal extension of the error signal. A combiner is provided to combine the transmission signal and the correction signal. As a result of the temporal extension of the error signal, an error signal segment in the frequency spectrum of a transmission signal transmitted by the nonlinear transmission path is shifted away from the useful frequency range of the transmission signal.

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Waischenfeld, Germany

Heinz Gerhafuser