双站方位时差定位系统精度分析  

Accuracy Analysis of Two Station DOA/TDOA Location

作　　者：崔焱[1] 王玉林[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2011年第3期44-46,57,共4页Radio Communications Technology

摘　　要：针对测向定位精度低,时差定位需要3个接收站以及精确时统的要求,提出方位时差联合定位体制。首先建立双站方位时差联合定位数学模型,列举测量方程组,分析方位线与时差线的交会性能,并提供解析解。然后在具体的模拟场景中,绘制了定位误差的分布效果图,根据直观特征,总结了方位时差联合定位系统的误差分布规律。又从测量方程组出发,通过微分关系,推导出理论定位精度几何稀释,并分析2种特殊情形下的定位效果。最后提供3种定位体制的定位误差对比数据,对实际工程应用中的布站设计具有指导意义。Considering low position finding accuracy of bearing location and the requirement of time difference of arrival location for three stations and rigorous synchronization of,a position finding system combining bearing with time difference is put forth.At first mathematical model of two station location system by bearing and time difference of arrival is established.Measurement equations are listed and crossing performance of bearing and time difference is analyzed and the resolution result is provided.Then simulation scene is set up,error distributing diagram is plotted and rule of position finding error is summarized.And according to differential of measurement equations,theoretic geometric dilution of precision is educed.In the end locating result of three methods and theoretic support for layout of receiving stations in engineering application are provided.

关 键 词：时差 方位 示向线 几何稀释 

分 类 号：TN911.23[电子电信—通信与信息系统]