Patent ID: 7113551

Claim:
A method of processing a transmission signal occupying a predetermined frequency band to reduce spectral regrowth outside said predetermined frequency band, said method comprising: transforming a modulated form of said transmission signal in accordance with a pre-distortion function configured substantially as a polynomial in the form of a sum of a plurality of terms wherein each of said terms includes a coefficient having a baseline component and an offset component to generate a pre-distorted form of said transmission signal; amplifying said pre-distorted form of said transmission signal in a power amplifier to generate an amplified form of said transmission signal having an in-band component within said predetermined frequency band and an out-of-band component outside said predetermined frequency band; conditioning said out-of-band component of said amplified form of said transmission signal to generate a feedback signal; and applying a genetic algorithm to said feedback signal to modify said pre-distortion function by generating new offset components and altering said baseline components in response to said new offset components.