Patent ID: 6751447
Filing Date: 2004-06-15
Classification: H03F,H04L

Abstract:
For use in an RF transmitter having a transmit path capable of receiving and amplifying an RF input signal, a pre-distortion correction circuit for modifying distortion in said RF output signal caused by an RF power amplifier in said transmit path, said pre-distortion circuit comprising:feedback circuitry coupled to an output of said transmit path capable of demodulating and digitizing said distorted RF output signal to thereby produce a first demodulated digital output signal; and a pre-distortion calculation controller coupled to said feedback circuitry capable of comparing only said first demodulated digital output signal with adjacent channel power (ACP) profile data associated with said pre-distortion calculation controller and generating therefrom pre-distortion correction values capable of being used to pre-distort said RF input signal to thereby cause said RF output signal to more closely resemble an ideal RF output signal within the limits of said ACP profile.