高低轨宽带卫星通信系统特点对比分析

Comparative Analysis of GEO and LEO Broadband Satellite Communication System

当前宽带卫星通信系统发展迅速,系统容量、组网能力等均有较大提升。针对宽带卫星通信系统发展现状,分别对常规高轨宽带卫星通信系统、高轨高通量卫星通信系统以及基于固定点波束和移动点波束的低轨宽带卫星通信系统的各自典型系统进行了简要介绍。在覆盖、链路能力、关口站特点、终端特点、系统容量效率、业务传输时延等多个角度对高轨和低轨宽带卫星通信系统的特点进行了对比分析。针对未来发展,提出了高低轨卫星通信系统协调发展建议。

At present,broadband satellite communication systems are progressing rapidly,system capacity and network capabilities have been greatly improved.According to the development status of broadband satellite communication systems,typical systems of conventional broadband satellite communication systems,high-throughput satellite(HTS)communication systems and LEO(low-earth-orbit)broadband satellite communication systems are briefly introduced based on fixed spot beams and mobile spot beams.And characteristics of GEO(geosychronons earth orbit)and LEO broadband satellite communication systems are compared and analyzed in terms of coverage,link capabilities,gateway characteristics,user terminal characteristics,system capacity efficiency,and service transmission delay.Suggestions for the coordinated development of GEO and LEO satellite communication systems are proposed.