Patent ID: 6072364
Filing Date: 2000-06-06
Classification: H03F

Abstract:
An adaptive method for predistorting a signal to be transmitted, supplied by a signal source to an input of a power amplifier having an output for delivering an amplified output signal, comprising the steps of:predistorting the signal to be transmitted by means of predistortion amplitude and phase look-up table means interposed between the signal source and the input of the power amplifier;producing a first feedback signal in response to the predistorted signal;producing a second feedback signal in response to the amplified output signal from the power amplifier;delaying at least one of the first and second feedback signals for eliminating any time lag between said first and second feedback signals;modeling the power amplifier in response to the first and second feedback signals; andupdating the predistortion amplitude and phase look-up table means in response to said modeling of the power amplifier.