基于多普勒变化率的单星无源定位  

Passive localization by a single satellite based on doppler rate-of-change

作　　者：张敏[1] 冯道旺[1] 郭福成[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《航天电子对抗》2009年第5期11-13,64,共4页Aerospace Electronic Warfare

基　　金：国家自然科学基金(60702010);航空科学基金(20070888005)资助项目

摘　　要：针对单星测向定位中干涉仪设备复杂、卫星姿态测量要求高等不足,提出了一种基于多普勒变化率的单星无源定位方法。在分析定位原理的基础上介绍了一种网格搜索定位计算方法,并对定位中出现的模糊问题提出了三种解决方案。通过理论分析,研究了定位误差与测量精度的关系。仿真结果表明基于频率变化率的单星定位方法可得到较高精度的定位结果,GDOP分布表明对星下点两侧对称区域内的目标辐射源可实现定位。Due to the complexity of the interferometers and high requirement of satellite attitude,a method of passive localization based on Doppler rate-of-change of single satellite channel is presented. After analyzing the positioning principle, a grid searching method and three kinds of solutions to solve the positioning ambiguity are introduced. The relationship between the positioning precision and the measuring precision is also analyzed. Simulation results show that this method can get high accuracy for localization. The GDOP analysis shows that the emitter sites in the symmetric side area of the ground sub-satellite track can be located.

关 键 词：卫星 多普勒变化率 无源定位 误差分析 

分 类 号：TN953[电子电信—信号与信息处理]