System and method for digital memorized predistortion for wireless communication

Abstract

A power amplifier system includes an input operable to receive an original value that reflects information to be communicated and an address data former operable to generate a digital lookup table key. The power amplifier system also includes a predistortion lookup table coupled to the address data former and a power amplifier having an output and coupled to the predistortion lookup table. The power amplifier system further includes a feedback loop providing a signal associated with the output of the power amplifier to the predistortion lookup table and a switch disposed in the feedback loop and operable to disconnect the predistortion lookup table from the output of the power amplifier.

1 . (canceled) 
     
     
         2 . A method comprising:
 receiving an input signal;   providing the input signal to an address data former, wherein the address data former generates a digital lookup table key corresponding to the input signal;   providing the digital lookup table key to a predistortion lookup table coupled to the address data former, wherein the predistortion lookup table generates a predistortion signal based on the digital lookup table key;   multiplying the input signal and the predistortion signal to produce a multiplied signal;   amplifying the multiplied signal at a power amplifier to produce an amplified signal;   providing a feedback signal corresponding to the amplified signal; and   selectively connecting and disconnecting the feedback signal to the predistortion lookup table.