传感器位置误差条件下仅用到达频率差的无源定位性能分析  

Performance Analysis for Passive Source Localization Using Merely FDOA Measurements with Erroneous Receiver Positions

作　　者：李金洲[1] 郭福成[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《航空学报》2011年第8期1497-1505,共9页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(60702010);国防科学技术大学优秀研究生创新资助(S100402)~~

摘　　要：传感器自身的位置误差对辐射源的无源定位精度可能有较大影响,详细分析并推导了在存在传感器位置误差条件下,仅使用到达频率差(FDOA)参数对辐射源定位时,定位精度的克拉美罗下限(CRLB)和均方误差(MSE)。在传感器位置误差条件下,提出仅用FDOA来同时估计辐射源和传感器位置的泰勒级数方法,并证明该定位方法理论上的MSE和CRLB一致。实验中在给定较好初始解的情况下,泰勒级数方法的估计精度基本上达到了CRLB,同时也验证了定位误差CRLB和MSE性能理论分析的正确性。The accuracy of passive localization is very sensitive to erroneous receiver positions.This paper performs a Cramer-Rao lower bound（CRLB）and a mean-square error（MSE）analysis for passive localization using frequency-difference-of-arrival（FDOA）only.An iterative algorithm,the Taylor-series method,is applied to estimate the location of an emitter and the positions of receivers using FDOA measurements when the receivers have random position errors.The theoretical MSE of the algorithm is derived and proved to meet the CRLB.Given a good initial solution guess,simulation results show that the estimation accuracy approximately attains the CRLB and demonstrate the feasibility of the accuracy analysis.

关 键 词：无源定位 到达频率差 泰勒级数 克拉美罗下限 均方误差 

分 类 号：V243.2[航空宇航科学与技术—飞行器设计] TN971.5[电子电信—信号与信息处理]