摘要
区域性卫星移动通信系统对于发展中国家具有十分重要的意义,特别是对于中国这样幅员辽阔且在广大农村地区缺乏基本通信手段的国家。采用中轨星座是解决这一问题的有效途径。本文提出了一种用于区域性系统的中轨星座设计方法:“时间决定”星座设计。该星座可为特定地区提供性能优越的服务,它提供的服务可以是时限的,也可以是非时限的。利用这种设计方法可以为中国设计经济的卫星移动通信系统星座方案,同时这些星座方案也可为美国大陆提供优越的服务。
Regional mobile satellite communication systems are very important for developing countries, especially for China that lacks the basic communication methods in her large rural areas. Adopting Medium Earth Orbit (MEO) constellation is an effective way for this situation . Time-dependent constellation for the regional mobile satellite communication systems is proposed in this paper. The constellation can provide excellent coverage performance for special territory, and the system service provided by the constellation can be time-limited and non-time-limited. The constellation schemes (time-limited and non-time-limited) of the economical mobile satellite communication system for China designed with this method are proposed in this paper, and they also can provide excellent service for United States.
基金
863计划资助项目
关键词
卫星移动通信
星座设计
区域性覆盖
“时间决定”
Mobile satellite communication system, Constellation design, Regional coverage, Time dependent
