Patent ID: 7068980

Claim:
A pre-distortion apparatus for recovering nonlinear distortion of a high power amplifier, comprising: a demodulator for demodulating a signal outputted from the high power amplifier, generating a demodulated signal; a first storage means for storing the demodulated signal outputted from the demodulator; a second storage means for storing a reference transmission signal outputted from a transmitter of a transmitting system; a digital signal processor for calculating a pre-distortion coefficient by comparing the demodulated signal and the reference transmission signal stored at the first storage means and the second storage means; and a third storage means for storing the pre-distortion coefficient calculated at the digital signal processor; wherein the digital signal processor comprises: an input/output characteristics storage means for storing amplitude and phase characteristics of a high power amplifier; and a pre-distortion coefficient calculator for calculating the pre-distortion coefficient by comparing amplitude values and phase values of the stored demodulated signal and the stored reference transmission signal with the amplitude and phase characteristics of the high power amplifier.