摘要
在高动态导航中,卫星接收机自主完好性监测(RAIM)越来越受到重视。假如在单一模式下监测,RAIM系统至少需要接收到5颗卫星的信息才能监测出异常卫星,而如果需要辨识出故障卫星,则至少需要接收到6颗卫星的信息,这就使得单一的接收模式很难保证在全球范围内进行全天候的完整性检测。而随着北斗(BD)系统的迅速发展,使得采用GPS+BD导航模式进行监测成为可能。文中讨论了GPS和BD组合接收机中,在某时刻假设只有一颗卫星出现故障的情况下,怎样使用加权方法进行自主完好性监测。并通过仿真GPS、BD单模式和GPS+BD模式下的故障识别率和RAIM完好性可用率,证明了GPS+BD模式RAIM算法要优于任何一种单系统模式的RAIM算法。
In high dynamic navigation, satellite Receiver Autonomous Integrity Monitoring （RAIM） is gaining more attention. Five satel- lites would be needed at least to monitor abnormal satellite in single RAIM model system, more than six satellites must be provided to i- dentify the faulty satellites. This makes it hard to ensure the all-weather autonomous integrity monitoring in global space using single GPS or BD model. With the rapid development of BD system,it makes possible to use GPS＋BD double model. Discuss how to use method of weighting in RAIM monitor supposed only one trouble satellite in GPS＋BD model receiver. And it separates simulation in single GPS or BD model and GPS＋BD double model. Contrasting failure recognition rate and completeness or adequateness of RAIM, it demonstrated double module RAIM is superior than the any kind of RAIM algorithm.
出处
《计算机技术与发展》
2013年第7期238-241,共4页
Computer Technology and Development
基金
贵州省科技计划项目:黔科合J字[2012]2290号
重庆交通大学实验教学改革与研究项目[SYJ201221]
