Joint Digital Analogue DVB-S2(X) Link Optimization in Non-Linear Channel

IEEE Access

Stephen Mclaughlin¹  Maria Jesus Canevate Sanchez¹  George Goussetis¹  Yuan Ding¹  Andrea Segneri¹  Kai Xu²  Mengwei Sun² 

[1] School of Engineering and Physical Sciences, Institute of Sensors Signals and Systems, Heriot-Watt University, Edinburgh, U.K.;School of Engineering, Institute of Digital Communications, The University of Edinburgh, Edinburgh, U.K.;

关键词: DVB-S2/DVB-S2(X);    equivalent full-linear link;    non-linear system;    optimum configurations;   

DOI  :  10.1109/ACCESS.2022.3167032

来源: DOAJ

【 摘 要 】

Future broadband satellite communication (SatCom) systems require a high throughput of data transmission, which calls for operation at higher frequency bands. Adaptive coding and modulation (ACM) technology has been considered as a means to obtain improved performance further at these frequencies. However, the ACM protocols in current DVB-S2 and DVB-S2(X) standards do not take the effects that arise from the non-linear link with memory into account, which is generated by the cascade of a high-power amplifier (HPA) and digital root raised cosine (RRC) filters. This paper first reveals the non-linear characteristics of the SatCom link, and transfers this into an equivalent full-linear link with an additive noise source thanks to the pre-distortion algorithm. Using this equivalent modeling, an approach of selecting/adapting the optimum coding, modulation scheme and associated system configurations for a given channel fading level is proposed. Both simulations and experimental test-bed performance are presented to validate the proposed method.

【 授权许可】

Unknown