GPS/北斗组合卫星导航系统快速选星算法  

A Fast Satellite Selection Algorithm for GPS/BD Integrated Navigation System

作　　者：刘帅[1] 赵国荣[2] 高超[2] 曾宾[2] 

机构地区：[1]海军航空工程学院研究生管理大队,山东烟台264001 [2]海军航空工程学院控制工程系,山东烟台264001

出　　处：《电光与控制》2017年第3期32-35,共4页Electronics Optics & Control

基　　金：国家自然科学基金(61473306)

摘　　要：为实现GPS/北斗组合卫星导航系统的快速选星,提出一种基于几何布局的快速选星算法。根据最优选星方案的卫星分布特点,利用卫星高度角和方位角信息实现卫星的区域划分,应用代价函数法对中仰角区域的卫星进行筛选,得到最终的选星方案。与最优选星算法相比,该算法计算量明显减小;仿真结果表明,该算法能将几何精度因子(GDOP)控制在小于2.5的范围内,具有较好的选星效果。综合考虑算法复杂度和选星效果,基于几何分布的快速选星算法能够满足航空航天等对精度和实时性要求较高的领域的需求。To realize fast satellite selection for GPS/BD integrated navigation system,a selection algorithm based on the geometry layout is presented. According to the geometry layout feature of the optimal satellite selection result,the visible satellites are divided into different groups by their azimuth and elevation,and then cost function is used for selecting satellites in each group. Compared with the original optimum satellite selection algorithm,the fast satellite selection algorithm need less computation. The emulation result shows that it works well and can keep the Geometric Dilution of Precision（GDOP） within 2. 5. It can satisfy the requirements to precision and real-time performance in the aerospace field.

关 键 词：组合导航 选星算法 几何布局 代价函数 北斗导航系统 

分 类 号：TN967.1[电子电信—信号与信息处理]