In recent years, the digital pre-distortion (DPD) method has begun to spread for distortion compensation of power amplifiers in transmitters which transmit digital modulation signals.
There are several distortion compensation methods in high power SSB transmitters for HF bands; however, the amount of compensation in the analog method has reached its limit. We have realized commercialization by adopting DPD for the first time, in the latest transmitter we have developed.
This report introduces the development history, features, unique technology etc. of this transmitter.