Patent ID: 7313199

Claim:
A combination comprising: a high power amplifier (HPA) for transmitting an RF modulated signal said HPA having an input port and an output port, and said HPA being subject to introducing distortions into the transmitted signals produced at its output port; means for receiving digital baseband signals; means responsive to said digital baseband signals for digitally up-converting the baseband signals and generating digital signals defining a digital RF waveform corresponding to the baseband signals; and a digital RF predistorter circuit responsive to the digital signals defining the digital RF waveform and to one of (a) a digitally sampled signal derived from the output of the HPA and (b) stored data pertaining to the characteristics of the HPA, for directly operating on and modifying consecutive digital signal samples defining the digital RF waveform on a point by point basis; and means for coupling the modified digital signals defining the digital RF waveform to the input port of the HPA for linearizing the response of the HPA and producing an output signal at the output port of the HPA which tends to be a linear function of the baseband signals.