无线电导航系统中基于GDOP的伪卫星定位误差研究  

Study of Positioning Error of Pseudolite in the Radio Navigation System Based on GDOP

作　　者：刘奕辰[1] 周晓尧[1] 许化龙[1] 

机构地区：[1]第二炮兵工程学院,陕西西安710025

出　　处：《现代电子技术》2007年第7期10-11,14,共3页Modern Electronics Technique

摘　　要：在卫星导航系统中,卫星定位的精度等性能很大程度上取决于定位卫星之间的相对几何布局,而GDOP(几何精度因子)正是衡量定位卫星几何布局优劣的一个很好的量度。为了更好地提高伪卫星的定位精度,从GDOP值的研究入手,得出一种基于加权GDOP(WGDOP)值的地面伪卫星定位误差算法。最后经过仿真比较基于常规GDOP和WGDOP两种精度因子的定位误差的大小,体现出WGDOP算法的优越性。In the satellite based positioning system,the capabilities such as the precision of positioning are heavily dependent on the geometric distribution of satellites being tracked. And GDOP（Geometric Dilution of Precision）is a right measure of the geometry of the constellation. In order to improve the positioning precision of the pseudolite, after studying the GDOP,in this paper we find a kind of method that used for computing distribution of pseudolite based on weighted GDOP（WGDOP）. And then we have compared the methods which based on these two kinds of GDOP. The result shows us the advantage of the WGDOP.

关 键 词：GDOP 伪卫星 无线电导航系统 定位误差 

分 类 号：TN961[电子电信—信号与信息处理]