基于多历元相关距离的接收机自主完好性监测  

RAIM Algorithm Based on Correlation Distance with Several Epoch

作　　者：胡彦逢[1] 陆建军[2] 曹可劲[1] 李豹[1] 

机构地区：[1]海军工程大学导航工程系,湖北武汉430033 [2]海军装备部综合计划部,北京100841

出　　处：《探测与控制学报》2014年第1期42-45,50,共5页Journal of Detection & Control

基　　金：国家自然科学基金项目资助(61004126)

摘　　要：针对传统的单历元奇偶矢量接收机自主完好性监测方法无法检测伪距误差较小情况的缺陷,提出一种基于多历元相关距离的监测方法。该方法通过构造奇偶矢量多历元叠加矩阵,将N个历元的伪距信息进行整合,其中的固定偏差量得到累积,而由噪声引起的偏差互相抵消,然后用归一化相关距离检测出存在故障的卫星。仿真表明,该方法可有效检测静态和低动态条件下存在慢变伪距偏差的情况,当单星存在0.5m偏差时,检测概率提高到95%以上,双星存在0.5m以内偏差也可以提高到60%以上。For the basis of parity vector,traditional method with one epoch can not work well on since pseudo-range deviation.This paper put forward an improved correlation distance method with more than one epoch for receiver autonomous integrity monitoring,combined with normalized correlation distance principle.The simula-tion results showed that this new RAIM algorithm worked well on the since slowly varying pseudo-range devia-tion under static and low dynamic conditions.The detection probability was increased up to 95% when 0.5 m pseudo-range deviation existing in one of the satellites available,and the two of the satellites,which was in-creased up to 60%.

关 键 词：全球卫星导航系统 接收机自主完好性监测 微小伪距偏差 奇偶矢量 归一化相关距离 

分 类 号：TN967.1[电子电信—信号与信息处理]