多运动站测角频差无源定位方法研究  

Research on Multiple Moving Observers Passive Localization with DOA and FDOA Measurements

作　　者：贾兴江[1] 周一宇[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：《国防科技大学学报》2011年第1期76-80,共5页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(60702010)

摘　　要：针对测角频差无源定位问题,提出了一种快速有效的解析定位方法,该方法通过引入中间量,将辐射源位置非线性估计问题转化成两个加权线性最小二乘估计问题,简化了定位解算。该方法无需进行参量搜索,比搜索法运算量小;无需初始值引导,比高斯-牛顿迭代法使用方便。在结构上,建立了观测模型,然后给出了辐射源定位误差对应的克拉美罗限,阐述了解析法的基本步骤及理论性能,仿真实验结果表明,当观测误差不太大时,解析法对应的定位误差能够有效逼近克拉美罗限。For hybrid direction of arrival（DOA） and frequency difference of arrival（FDOA） passive localization,a fast and effective algebraic solution is proposed.This method converts the emitter position nonlinear estimation problem into two weighted linear least-squares minimization,which simplifies the emitter localization process.The proposed means does not have the search procedure,so it has less computational load than traditional search method.Furthermore,it is also more convenient,because it does not need the initial value of the emitter as in the Gauss-Newton iterative method.In structure,the observation equations were first established.And then the Cramér-Rao Lower Bound（CRLB） of the emitter＇s position estimation was presented.Moreover,the procedures and theoretical performance of the algebraic solution were given.Finally,the simulation was conducted.The results show that the location error of the algebraic solution approaches the CRLB at moderate measurement noise level.

关 键 词：多普勒效应 最小二乘逼近 非线性估计 迭代法 

分 类 号：TN971[电子电信—信号与信息处理]