HIGH FREQUENCY AMPLIFIER AND METHOD OF COMPENSATING FOR DISTORTION

摘要

Disclosed is a high frequency amplifier which can properly compensate for distortion generated in a power amplifier even when an observation band of a feedback signal is made narrow. The high frequency amplifier includes a data correction unit that corrects transmission data through a digital pre-distortion method, and the data correction unit includes an orthogonalizer that orthogonalizes and outputs respective order components of a polynomial model for the digital pre-distortion method, and a compensator that compensates for a memory effect of the power amplifier for an output of the orthogonalizer.

主权项

1. A high frequency amplifier comprising:
a data correction unit configured to correct transmission data based on digital pre-distortion; a power amplifier configured to amplify output power of a transmission signal generated as a function of the corrected transmission data; a feedback signal output unit configured to output the amplified transmission signal; and an error detector configured to calculate a correction value to correct the transmission data based on a feedback signal output from the feedback signal output unit and a reference signal output from the data correction unit.