05892397 is referenced by 68 patents and cites 25 patents.

The envelope-dependency of the distortion-introducing behavior of an RF power amplifier is used to derive a predistortion signal, that is derived from a plurality of respectively different work function representative signals. Each work function signal, in turn, is based upon the envelope of the input signal to the RF power amplifier. Prior to being combined into a predistortion control signal, each work function signal is controllably weighted in accordance with an error measurement comparison of the amplifier input signal with the amplifier output signal. The error measurement function yields a measure of the error contained in the-amplifier output signal, and drives a weight adjustment control mechanism, which controllably varies a set of weights for each of in-phase and quadrature components of the respectively different signal functions, in such a manner as to minimize the measured error.

Title
Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude
Application Number
8/626239
Publication Number
5892397
Application Date
March 29, 1996
Publication Date
April 6, 1999
Inventor
Kent E Bagwell
Rogersville
TN, US
Michael A Wohl
Rogersville
TN, US
Donald K Belcher
Rogersville
TN, US
Agent
Charles E Wands
Assignee
Spectrian
CA, US
IPC
H03F 1/32
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