Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-08-28
2007-08-28
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C332S107000, C332S117000
Reexamination Certificate
active
10620792
ABSTRACT:
A device for predistorting a digital symbol for modulating an RF signal includes a multi-bit buffer connected to an input serial bit stream and providing a parallel bit stream from the input serial bit stream; and a processing module connected to the input parallel bit stream. The processing module converts data bits of the input parallel bit stream into an input digital symbol and inputs a set of gain adjustments and phase adjustments that compensate for a channel distortion. The processing module decides which of the set of gain and phase adjustments to apply depending on a magnitude of the input digital symbol, applies a gain adjustment and a phase adjustment, from the set of gain and phase adjustments, to the input digital symbol to produce a predistorted symbol, and outputs quadrature components of the predistorted symbol to a quadrature modulator.
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Bocure Tesfaldet
Ingrassia Fisher & Lorenz P.C.
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