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伪卫星辅助的“北斗”双星系统无源定位方法

刘瑞华;张帆;   

  1. 中国民航大学新航行系统研究所;
  • 出版日期:2010-08-25 发布日期:2010-08-25

Passive Location Method of Beidou Geostationary Satellites Positioning System Aided by Pseudolites

Liu Ruihua Zhang Fan (Institute of CNS/ATM,Civil Aviation University of China,Tianjin 300300)   

  • Online:2010-08-25 Published:2010-08-25
  • Supported by:
    国家高技术发展计划(863计划)(2006AA12Z313)

摘要: 目前中国的"北斗"双星定位系统只能实现二维有源定位,大大限制了该系统的应用。针对这种情况,充分利用现有的"北斗"双星系统资源,提出了使用伪卫星来辅助"北斗"双星系统的方案;推导了此系统的定位原理,并且简单分析了系统的时间同步问题;通过数学推导和仿真分析,研究了伪卫星数目以及布局对系统定位精度的影响,得出了伪卫星布局的相应结论。仿真结果表明,此方案是可行的,采用伪卫星来增强"北斗"双星导航系统,可以提高整个系统的可用性、可靠性、稳定性以及测量精度,为现阶段"北斗"双星系统无源定位的应用提出了一种低成本的改进方法。

关键词: 北斗双星定位系统, 伪卫星, 时间同步, 定位误差, 仿真

Abstract: At present,China's Beidou geostationary satellites positioning system can only achieve two-dimensional active location,which greatly limits its application. A passive location method was put forward by using pseudolites to aid Beidou Geostationary Satellites Positioning System. The positioning theory of this system was discussed and the system time synchronization problem was analyzed. The effects of number and layout of pseudolites on the system accuracy were researched by mathematical simulation. The results show that the proposed method is feasible,which can enhance the usability,reliability,stability and the location precision of the system.