Research Article
Research and Implementation of Adaptive Digital Pre-distortion in High-speed 32-APSK Satellite Communication System
@INPROCEEDINGS{10.4108/icst.chinacom.2014.256298, author={Celun Liu and Wei Du and Ping Tang and Xinmeng Li and Zhulin Xiong}, title={Research and Implementation of Adaptive Digital Pre-distortion in High-speed 32-APSK Satellite Communication System}, proceedings={9th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2015}, month={1}, keywords={adaptive digital pre-distortion 32-apsk qrd-rls satellite communication}, doi={10.4108/icst.chinacom.2014.256298} }- Celun Liu
Wei Du
Ping Tang
Xinmeng Li
Zhulin Xiong
Year: 2015
Research and Implementation of Adaptive Digital Pre-distortion in High-speed 32-APSK Satellite Communication System
CHINACOM
IEEE
DOI: 10.4108/icst.chinacom.2014.256298
Abstract
Adaptive Digital Pre-distortion (DPD) is applied to the typical traveling wave tube amplifier for high-speed 32-APSK satellite communication system. The paper presents research and implementation of adaptive digital pre-distortion. We show first the transmission system model and the adaptive algorithm based on QR decomposition RLS algorithm to achieve adaptive digital pre-distortion. We also present the hardware architecture of the pre-distorter. Finally, we apply the pre-distorter to an actual satellite communication system whose the modulation is 32-APSK with symbol rate of 162.5MHz. The experimental results show that the linear effect and the performance of the system are greatly improved by the application of adaptive digital pre-distortion.