Adaptive predistortion for a transmit system

Details Adaptive predistortion for a transmit system Adaptive predistortion for a transmit system

2006-06-27

2006-06-27

Mottola, Steven J. (Department: 2817)

Amplifiers

Hum or noise or distortion bucking introduced into signal...

C330S084000

Reexamination Certificate

active

07068101

ABSTRACT:
Systems, methods, and devices relating to the provision of deliberate predistortion to an input signal to compensate for distortions introduced by an amplifier subsystem. An input signal is received by a predistortion subsystem which applies deliberate predistortions to the input signal to arrive at a predistorted signal. The predistorted signal is received by an amplifier subsystem which decomposes the signal, processes the decomposed signal, and then recombines the components to arrive at a system output signal. The predistortion subsystem adaptively adjusts the predistortions based on characteristics of the system output signal. A feedback signal, a replica of the system output signal, is used in updating lookup table entries used to determine the predistortion.

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Michael Faulkner; Adaptive Linearization Using Predistortion—Experimental Results, IEEE Transactions on Vehicular Technology; May 1994; pp 323-332; vol. 43, No. 2.

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