Patent ID: 7046972

Claim:
A predistortion linearizer for wireless communication device, comprising: signal dividing means of dividing an input signal that has been input, into two signals; signal adjusting means of using one of said divided signals to execute predetermined adjustment and outputting a signal based on a result of the adjustment; distortion signal generating means of generating a distortion signal using the signal output from said signal adjusting means; signal synthesizing means of synthesizing the other of said divided signals with said generated distortion signal; and signal amplifying means of amplifying said synthesized signal and outputting an output signal, and wherein said signal adjusting means executes said predetermined adjustment such that (1) there is a predetermined relationship between the level of a difference between the signal amplitudes of predetermined frequency components contained in a distortion signal generated by said distortion signal generating means and the level of a difference between the signal amplitudes of said predetermined frequency components contained in a distortion signal generated by said signal amplifying means and/or (2) there is a predetermined relationship between a difference between the phases of said predetermined frequency components contained in the distortion signal generated by said distortion signal generating means and a difference between phases of said predetermined frequency components contained in the distortion signal generated by said signal amplifying means.