UNDER-SAMPLING DIGITAL PRE-DISTORTION ARCHITECTURE

摘要

A amplifier system may include a predistorter receiving an input signal to generate a predistortion signal, a first converter receiving the predistortion signal to generate a preamplified signal, a power amplifier receiving the preamplified signal to generate an output signal based on the preamplified signal and the input signal, and a second converter sampling the output signal to generate a feedback signal. The power amplifier may produce a distortion signal at a first frequency, the second converter may sample the output signal using a timing signal with a second frequency that is lower than the first frequency to generate the feedback signal, and the predistorter, based upon the feedback signal, may predistort the predistortion signal to reduce the distortion signal at the first frequency.

主权项

1. An amplifier system, comprising:
a predistorter receiving an input signal to be transmitted by the system; a first converter receiving an output of the predistorter to generate a preamplified signal; a power amplifier receiving the preamplified signal to generate an output signal based on the preamplified signal; and a second converter sampling the output signal to generate a feedback signal; wherein the predistorter, responsive to an output of the second converter, introduces a predistortion signal to the input signal.