卫星自动识别系统观测模型及检测概率分析  

Satellite-borne AIS Observe Model and Detection Probability Analyze

作　　者：宋果林 邹光南[1] 王艳峰[1] 石云[1] 尤启迪 

机构地区：[1]北京卫星信息工程研究所,北京100086

出　　处：《航天器工程》2015年第4期136-142,共7页Spacecraft Engineering

基　　金：国家自然科学基金青年科学基金项目(61401030)

摘　　要：针对卫星自动识别系统(AIS)天线的覆盖面积大、包含多个自组织区可能导致接收信号碰撞的特点,分析了星载AIS接收信号重叠碰撞的机制,对卫星AIS观测模型进行了等效蜂窝模型的建模,将AIS信号到达卫星接收机的过程等效为泊松随机过程,在此基础上分析了卫星AIS对船舶的检测概率,并对影响检测概率的各个因素进行了仿真分析,根据仿真结果提出了两种提高船舶检测概率的方法,对优化AIS的设计、分析系统对船舶的检测概率有一定的参考作用。Considering the fact that the antenna of stellite-borne AIS system has a large coverage zone and covers hundreds of SOTDMA cells that may lead to signal collide,the signal collision mechanisms are analyzed in the paper.An equivalent cellular model is established to analyze the detection probability of ships equipped with AIS system.The process of AIS signals accessing the receiver is considered as Poison process.All factors affecting on the detection probability are also discussed on the formula of detection probability.Two methods used to improve the detection probability are discussed in the paper.The results of the analysis and simulation have a positive effect on designing satellite-borne AIS and analyzing the detection probability of vessels.

关 键 词：卫星自动识别系统 自组织时分多址 自组织区 观测模型 信号碰撞 检测概率 

分 类 号：V443[航空宇航科学与技术—飞行器设计] V556