Research and implementation of adaptive digital pre-distortion in high-speed 32-APSK satellite communication system

Author

Celun Liu ; Wei Du ; Ping Tang ; Xinmeng Li ; Zhulin Xiong

Author_Institution

Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China

fYear

2014

Firstpage

321

Lastpage

326

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.

Keywords

adaptive modulation; least squares approximations; matrix decomposition; phase shift keying; satellite communication; travelling wave amplifiers; DPD; QR decomposition RLS algorithm; adaptive digital pre-distortion; frequency 162.5 MHz; hardware architecture; high-speed 32-APSK satellite communication system; linear effect; transmission system model; traveling wave tube amplifier; Arrays; Hardware; Modulation; Nonlinear distortion; Power amplifiers; Satellite communication; Vectors; 32-APSK; QRD-RLS; adaptive digital pre-distortion; satellite communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking in China (CHINACOM), 2014 9th International Conference on

Type

conf

DOI

10.1109/CHINACOM.2014.7054310

Filename

7054310