摘要
探究星间链路对导航系统抗击性能的影响。由于传统算法链路切换频繁,时延较大,实时性差。为提高系统的性能,提出了一种切换次数和通信时延均较少的星间链路算法。以欧盟的伽利略导航系统为例,在一颗卫星损毁的情形下,根据提出的算法构建星间链路模型,通过建模与仿真获得了观测站的精度因子变化情况。通过比较、分析导航系统有无链路情况下精度因子变化情况,得出星间链路能有效地修正定位误差,提高导航系统定位精度,进而增强系统抗打击能力的效果。
The article probes whether Inter Satellite Links can improve the anti - attack capability of navigation system. For the reason that the traditional Minimum Distance Algorithm needs more changing times, this article put forward an algorithm of building ISLs that only requires littler time of delay and times of changing links. Under the condition that a satellite fails to work, it acquires dilusion of precision variety of observation station after constituting ISLs based on the proposed algorithm in Galileo Navigation system. At last, it drew a conclusion by comparing and analysing simulation results. The experimental results show that ISLs can modify positioning error, improve positio- ning precision and enhance anti - attack capability of navigation system.
出处
《计算机仿真》
CSCD
北大核心
2013年第10期99-102,共4页
Computer Simulation
基金
国家自然科学基金(031007
1024015)
关键词
星间链路
抗击性能
仿真
精度因子
Inter satellite links
Capability of anti - attack
Simulation
Dilution of Precision
