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.

What is claimed is: 
     
         1 . A power amplifier system comprising:
 an input operable to receive a signal that reflects information to be communicated;   an address data former operable to generate a digital lookup table key;   a predistortion lookup table coupled to the address data former;   a power amplifier having an output and an input, wherein the input to the power amplifier is coupled to the predistortion lookup table;   a feedback signal representing the output of the power amplifier; and   a switch coupled to the feedback signal and the predistortion lookup table, wherein the switch is configured to disconnect the feedback signal from the predistortion lookup table.