Predistorter and distortion compensation method

摘要

A predistorter includes a distortion compensating unit (45) which applies, in advance, an inverse characteristic to a characteristic from an input to the output of a power amplifier (48) to a transmission signal which is to be input to the power amplifier; a distortion compensation signal generating unit (43) which generates a distortion compensation signal indicating the inverse characteristic based on transmission data that is sample data of the transmission signal and the delayed transmission data; and a delay amount control unit (60) which controls a delay amount of the transmission data according to an output signal of the power amplifier (48).