DPD Performance for 12-GHz-band Satellite Transponder with APD Linearized TWTA

Abstract

Aiming for an improvement in transmission performance of 12-GHz-band satellite broadcasting, we are researching a digital pre-distortion (DPD) technique to compensate for distortion arising from the radio frequency (RF) component in the satellite transponder. We evaluated the performance of a digital pre-distortion technique on 32APSK for a 12-GHz-band satellite transponder, which has an analog pre-distortion (APD) linearized traveling wave tube amplifier (LTWTA).