Patent ID: 8311493
Filing Date: 2012-11-13
Classification: H03F

Abstract:
1. A radio apparatus comprising: a power amplifier that amplifies a power of an input signal; a storage unit that stores a distortion correction coefficient for correcting distortion occurring in the power amplifier, the distortion correction coefficient being stored in association with power of the input signal; a distortion corrector that acquires a distortion correction coefficient corresponding to the power of the input signal from the storage unit and performs a distortion correction process on the input signal using the acquired distortion correction coefficient; a calculator that calculates an error between the power of the input signal and a power of an output signal output from the power amplifier; a normalizer that normalizes the calculated error according to lager power as the power of the input signal or the power of the output signal is larger; and an update unit that updates the distortion correction coefficient stored in the storage unit in association with the power of the input signal, using the normalized error.