基于极大似然比的多故障卫星完好性检测  

RAIM algorithm for detection of multiple fault satellites based on maximum likelihood ratio

作　　者：孙淑光[1] 

机构地区：[1]中国民航大学智能信号与图像处理天津市重点实验室,天津300300

出　　处：《中国惯性技术学报》2011年第3期312-315,共4页Journal of Chinese Inertial Technology

基　　金：国家863高技术研究计划(2006AA12Z313);国家自然基金资助项目(60472124)

摘　　要：针对多星座情况下多卫星同时故障时的接收机自主完好性检测的问题,分析了多卫星同时故障的原因及特点,提出基于极大似然比的分层完好性检测方法。通过奇偶向量矩阵的计算,根据极大似然估计,进行故障检测与隔离,利用全量检验统计值与部分检验统计值之间的关系进行故障卫星的确定,并利用接收机的数据进行仿真验证。仿真结果表明,本方法可以快速有效地实现多星座情况下的接收机自主完好性检测,检测出并隔离故障卫星。Aiming at the receiver autonomous integrity monitoring（RAIM） problem when more than one satellite get faults at the same time for multi-satellite systems,the causes and characteristics of the multi-satellite faults are analyzed,and the parity vector matrix is calculated using maximum likelihood estimation to detect and isolate fault satellites.The hierarchy RAIM method is given based on maximum likelihood ratio to detect and isolate the fault satellites using the relationship between the whole test statistics and partial test statistics.The algorithm is verified by simulation using receiver data,and it is showed that this algorithm can detect and isolate the faulty satellites,and rapidly realize the RAIM for multi-satellite situation.

关 键 词：极大似然比 接收机自主完好性检测 全球导航星系统 检验统计值 

分 类 号：U666.1[交通运输工程—船舶及航道工程]