Patent ID: 8750416
Filing Date: 2014-06-10
Classification: H04L

Abstract:
1. A method to compensate an input to a radio frequency amplifier, the method comprising: digitizing an analog radio frequency input; down-converting the digitized radio frequency input to create a down-converted input, wherein one or more processors are configured to down-convert the digitized radio frequency input to create the down-converted input; digitizing an analog feedback coupled to an output of the radio frequency amplifier; down-converting the digitized feedback to create a down-converted feedback, wherein the one or more processors are configured to down-convert the digitized feedback; calculating pre-distortion coefficients based on the down-converted input and down-converted feedback; filtering the down-converted input using the pre-distortion coefficients, wherein the one or more processors are configured to filter the down-converted input to reduce peaks; up-converting an output of the digital pre-distortion filter to a carrier frequency, wherein the one or more processors are configured to up-convert the output of the digital pre-distortion filter to said carrier frequency; converting to the up-converted output to an analog output; and providing the analog output to the radio frequency amplifier.