Adaptive predistortion system and a method of adaptively...

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

Reexamination Certificate

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C330S136000, C375S297000

Reexamination Certificate

active

06853246

ABSTRACT:
An adaptive predistortion system for use with a power amplifier having a nonlinear amplification characteristic and a method of adaptively predistorting a signal is provided. In one embodiment, the adaptive predistortion system includes a coefficient update subsystem coupled to an output of the power amplifier and configured to update a set of predistortion coefficients using an iterative process based on an output signal of the power amplifier. Additionally, the adaptive predistortion system includes a predistortion filter subsystem coupled to the coefficient update subsystem and configured to employ the set of predistortion coefficients to reduce a level of distortion associated with the nonlinear amplification characteristic.

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U.S. Appl. No. 09/911,139 entitled “Digital Predistortion Technique for WCDMA Wireless Communication System and Method of Operation Thereof” filed Jul. 23, 2001.
“Minimum Distortion Power Polynomial Model (MDP-PM) of Nonlinear Power Amplifiers and Its Application on Analog Predistorters” by Haobo Lai and Y. Bar-Ness; (4 pages): VTC 99 Fall; Sep. 1999.

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