Patent ID: 9595925
Date: 2017-03-14
CPC Classifications: H03F

Claim:
1. A distortion-compensating power amplifier comprising: a power amplifier; a predistorter that performs pre-distortion processing, the pre-distortion processing applying an inverse characteristic of a distortion characteristic that is generated in the power amplifier to an input signal in a first channel; a filter that performs band limitation on the pre-distorted input signal by using a frequency characteristic that is shifted to one of a second channel which is a lower frequency band adjacent to the first channel and a third channel which is a higher frequency band adjacent to the first channel with respect to a center frequency of the first channel, the filter having a filter coefficient that is a complex number; a down-sampler that down-samples the band-limited input signal; and a digital-to-analog converter that converts the down-sampled input signal from a digital signal to an analog signal.