摘要
为解决组合导航系统定位精度与实时性之间的矛盾,提出一种新的BDS/GPS组合系统选星算法。该算法先选取仰角最大的卫星,再选取由剩余卫星组成的分布较均匀的3颗卫星组合,结合数值分析和最小几何精度因子法得到最优的5颗卫星组合。仿真结果表明,与最大体积法、最小几何精度因子法相比,该算法在保证定位精度的情况下,运算量大大减少,提髙了系统的实时性。
To resolve the conflict between positioning accuracy and real-time capability in the combined satellite navigation system,a new algorithm for choosing visible stars is presented.In the algorithm,firstly the maximum elevation of satellite is selected,then three more uniform distribution satellites are selected among other satellites,finally the optimal five satellites are selected by combining numerical and minimum geometric dilution of precision method.Simulation results show that compared with the maximum volume method and the minimum geometric dilution of precision method,the proposed algorithm reduces dramatically the amount of computation and improves the real-time capability when the positioning accuracy is ensured.
作者
王伟伟
胡兵
王俊义
WANG Weiwei;HU Bing;WANG Junyi(School of Information and Communication,Guilin University of Electronic Technology;Key Laboratory of Wireless Broadband Communication and Signal Processing in Guangxi,Guilin University of Electronic Technology; Guiling 541004,Chin)
出处
《桂林电子科技大学学报》
2018年第1期45-49,共5页
Journal of Guilin University of Electronic Technology
基金
广西科学研究与技术开发计划(桂科攻1598008-30)
关键词
几何精度因子
选星算法
定位精度
geometric dilution of precision
satellite selection algorithm
positioning precision
