提高星载GPS接收机RAIM算法运行效率的方法研究  

Research of improving the operating efficiency of RAIM algorithm on satellite-borne GPS receiver

作　　者：隋叶叶 刘恒毅 万程程 马文聪 刘杰强[1] SUI Yeye;LIU Hengyi;WAN Chengcheng;MA Wencong;LIU Jieqiang(Space Star Technology Corporation,Beijing 100086,China)

机构地区：[1]航天恒星科技有限公司,北京100086

出　　处：《测绘工程》2019年第2期22-26,32,共6页Engineering of Surveying and Mapping

摘　　要：文中分析最小二乘残差方法和奇偶空间方法的原理和方法,分别针对两种方法中的故障检测统计量构造、可用性判断、故障检测与故障识别等4个模块的运算量进行比较。提出一种基于最小二乘方法构造检测统计量的奇偶空间改进方法,该方法能够提高RAIM算法运算效率,并利用工程样机对算法进行实际验证。试验结果,表明在满负荷运算的情况下,即在导航星数目为12颗时,改进算法的运行时间仅为24.8 ms,相比最小二乘残差方法和奇偶空间方法运行时间分别减少64 ms和10 ms,运算效率更高,更加适合星载GPS接收机使用。Based on the study of two different RAIM methods, computational complexity comparison are given from monitoring statistics calculation,integrity assurance,fault detection and fault identification angles.One optimized RAIM algorithm is designed and verified on engineering prototype.The result shows that,the running time of this improved method is only 24.8ms when the navigation satellite number is up to 12,cutting 64ms and 10ms compared with SSE and Parity methods.This method can improve the operational efficiency effectively, which is more suited to the spaceborne GPS receiver.

关 键 词：RAIM 运算效率 故障检测 故障识别 可用性 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计] TN967.1[电子电信—信号与信息处理]