摘要
目前我国的北斗导航定位系统只能实现二维有源定位,这就大大限制了北斗导航系统的应用;采用伪卫星不但可以辅助增强北斗定位系统实现三维无源定位,提高定位精度,而且也可以单独组网并在区域范围内代替卫星导航系统进行独立定位;由于卫星定位系统的精度与卫星数目以及几何布局有着很大的关系,应用拉格朗日法,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。
Now the Beidou navigation and positioning system can only accomplish 2- D active positioning, thus its application is limited, But adopting several pseudolites not only can assistant the Beidou system to achieve tbe 3--D passive positioning and the more accurate posi tioning, hut also realize posilioning independendy. The syslem＇s positioning accuraey has great relation with the number of pseudolites as well as lhe geometry of them. The impacls of various geometries and the number of PI.s on the accuracy of the augmented system are investi gated by using Lagrange method and simulation, and the conclusions about the geometries of PI.s are obtained.
出处
《计算机测量与控制》
CSCD
2008年第1期100-102,共3页
Computer Measurement &Control
基金
西北工业大学科技创新基金资助项目(2006CR11)
陕西省自然科学基础研究计划资助项目(2006F15)
