Patent ID: 7194043

Claim:
A predistortion system comprising: a predistortion circuit adapted to receive an input signal, the predistortion circuit being configured to generate a corresponding predistorted signal at an output thereof, one or more signal processing elements configured to process the predistorted signal; a feedback processing circuit coupled between an output of the one or more signal processing elements and a control input of the predistortion circuit; and at least one spectral regrowth filter associated with the feedback processing circuit and configured to pass a first portion of a feedback signal while attenuating a second portion of the feedback signal, the spectral regrowth filter operating in conjunction with the feedback processing circuit to control one or more characteristics of the predistortion circuit; wherein the feedback processing circuit has a first input for receiving the predistorted signal and a second input for receiving the feedback signal from the output of the one or more signal processing elements, the feedback processing circuit generating a difference signal indicative of differences between the predistorted signal and the feedback signal.