一种用于提高定位精度的选星算法  

A satellite selection algorithm used to improve location precision

作　　者：丁淑敏[1] 魏苗苗 DING Shumin;WEI Miaomiao(School of Energy&Environment Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Electronic&Information Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院能源与环境学院,河南郑州450007 [2]中原工学院电子信息学院,河南郑州450007

出　　处：《中原工学院学报》2020年第1期49-55,共7页Journal of Zhongyuan University of Technology

基　　金：河南省高等学校重点科研项目(18A510006).

摘　　要：在分析几何布局选星算法原理及选星效果的基础上,提出了该选星算法的改进算法。该方法将几何布局选星算法与准最佳选星算法结合起来,不仅改善了几何布局选星算法的选星效果,而且保留了几何布局选星算法计算速度快、可用于单星座定位系统和多星座定位系统的优点。仿真结果表明:通过改进算法能够得到逼近最佳几何精度因子法的选星结果,相对于几何布局选星算法只增加了计算几何精度因子(GDOP)值的较小工作量。Based on the analysis of the principle and effect of the new fast satellite selection algorithm,an improved algorithm is proposed.This method combines the new satellite selection algorithm with the best satellite selection algorithm,which not only improves the star selection effect of the new algorithm,but also preserves the advantages of the new satellite selection algorithm,such as its fast computing speed and its applicability to single constellation positioning system and multi-constellation positioning system.The simulation results show that the improved algorithm can obtain the satellite selection results by approaching the optimal geometric precision factor method,with a small amount of GDOPvalue being added to the new algorithm.

关 键 词：几何布局选星算法 代价函数 几何精度因子 

分 类 号：TN961[电子电信—信号与信息处理]