Patent ID: 7583754

Claim:
A wideband pre-distortion linearization method for removing the influence of a memory effect in a RF power amplifier and extending a linearization bandwidth of digital pre-distortion, comprising: performing in-band pre-distortion compensation for an input signal according to characteristic parameters of said amplifier, to obtain an in-band pre-distortion signal; performing out-of-band pre-distortion compensation for said input signal according to characteristic parameters of said amplifier, to obtain an out-of-band pre-distortion signal; up-converting said in-band pre-distortion signal; adding said up-converted in-band pre-distortion signal to said out-of-band pre-distortion signal which is not up-converted, at an input of said power amplifier; inputting the added signal to said power amplifier as an input signal; taking a part of an output of said power amplifier as a feedback signal and comparing it with an original input signal; regulating adaptively characteristic parameters of the amplifier used for generating the in-band pre-distortion signal and the out-of-band pre-distortion signal according to the comparison result, so as to have the feedback signal close to that of the original input signal as much as possible in terms of waveform in time domain or frequency spectrum.