摘要
针对多基地无源雷达中对单目标的定位问题,提出一种仅利用角度信息的加权最小二乘定位算法。首先根据多基地无源雷达的拓扑结构,设计基于角度的目标定位模型。针对角度测量噪声大小的不同,分别对加权矩阵的计算给出两种不同的方法,并通过推导得出结论:低噪声条件下,该算法为最大似然估计;高噪声条件下,算法为最佳线性无偏估计。对所提算法进行详细误差分析,并推导算法的Cramer-Rao界。利用计算机仿真分析算法的性能,验证算法的有效性和先进性,并以3个接收站与1个外辐射源为例,分析不同接收站位置配置下定位误差情况,给出最佳位置配置建议。
A weighted least squares method is presented to improve single target location in multistatic passive radar.First the model of localization is constructed in multistatic passive radar based on system topology.Two weighted matrix designing methods are discussed to solve the problem under different angle measure errors condition.The conclusion is that one of the results in the maximum likelihood estimator and the other one leads to the best unbiased estimator.The error analysis is discussed about the performance of the proposed algorithm,and the Cramer-Rao lower bound for target localization accuracy is also derived.The validity and advantages are proved by simulation.In the case of localizing with three receivers and one transmitter,the different placements of receivers are simulated and the best configuration is also determined.
作者
赵闯
赵拥军
骆丽萍
单莉
ZHAO Chuang;ZHAO Yongjun;LUO Liping;SHAN Li(Information Engineering University,Zhengzhou 450001,China;the Staff Department of the North Sea Fleet,Qingdao 266071,China)
出处
《信息工程大学学报》
2019年第3期280-285,301,共7页
Journal of Information Engineering University
基金
国家自然科学基金资助项目(61501513,61701433)
关键词
多基地无源雷达系统
仅角度信息
辅助矩阵
加权矩阵
位置配置
误差分析
multistatic passive radar system
bearing-only
auxiliary matrix
weighted matrix
placement configuration
error analysis
