Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-01-30
2007-01-30
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
10018755
ABSTRACT:
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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Translated PCT Search Report; International Application No. PCT/EP00/04580; dated Oct. 1, 2001; pp. 1-6.
Gerhafuser Heinz
Hofman Maximilian
Perthold Rainer
Rogalsky Ingo
Ettehadieh Aslan
Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung
Ghayour Mohammed
Vedder Price Kaufman & Kammholz P.C.
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