摘要
分析和论证了自动识别系统(AIS)在低轨卫星中应用所涉及的相关问题,阐述了AIS系统特征,理论分析了低轨卫星与目标船舶的作用距离、低轨卫星的运行周期、多普勒频移对星载AIS通信的影响,并对星载接收链路进行了预计,给出了星载AIS接收机的实现方案。最后,对相关理论结果进行了仿真。
The feasibility analysis and demonstration of a LEO（Low Earth Orbit） satellite-based AIS （Automatic Identification System） are presented. The characteristics of AIS is discussed, the effect of the distance between the ship and the satellite, the period of the satellite＇s oA^it and the Doppler frequency shift between satellite and ship on the satellite-based AIS communication is theoretically analysed, the link budget with signal strength compared to AIS receiver sensitivity is given, and the design of LEO satellite-based AIS receiver is provided. Finally, the computer-based simulations are performed in Matlab.
出处
《电讯技术》
北大核心
2010年第9期114-118,共5页
Telecommunication Engineering
关键词
船舶自动识别系统
低轨卫星
时隙
接收链路
automatic identification system （AIS）
LEO satellite
slot
receiver link
