分布式电磁矢量传感器阵的二维测向算法  

2-D DOA estimation using a sparse linear array of distributed electromagnetic vector sensors

作　　者：邵华[1] 苏卫民[1] 顾红[1] 樊劲宇[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《电波科学学报》2013年第5期815-820,828,共7页Chinese Journal of Radio Science

基　　金：部预研基金(No.9140A07010713BQ02025);博士点基金(No.20113219110018);国家自然科学基金(No.61302188);江苏省自然科学基金(No.BK20131005)

摘　　要：采用由分布式电磁矢量传感器组成的稀疏线阵,针对相干信号提出了一种扩展孔径2维波达角(Two Dimensional Direction-of-Arrival,2-D DOA)估计算法.通过构造增强矩阵来消除信号的相干性,利用稀疏线阵包含的向量特性、x轴和y轴空间相位因子获得高精度无模糊估计.与传统算法相比,算法不但保留了传感器的向量特性,而且增大传感器各分量之间的间距以及传感器之间的间距来获得2-D孔径扩展,具有更高的测向精度.仿真验证了本文算法的有效性.An extended-aperture based algorithm for two dimensional direction-of- arrival（2-D DOA）estimation of coherent sources using a sparse linear array of dis- tributed electromagnetic vector sensors （DEMVS） is proposed. First, the coherent signals are decorrelated by constructing an enhanced matrix. Then,the vector prop- erty,x-axis and y-axis spatial phase factors embedded in the sparse linear array are employed to extract the high accurate and unambiguous 2-D DOA estimations. Com- pared with traditional 2-D DOA algorithms in multipath environment, the proposed method keeps the vector property of the DEMVS,and also increases the spacing be- tween components of the EMVES and the inter-sensor spacing to achieve 2-D aper- ture extension, and thus providing better estimation performance. Simulations are presented to verify the efficiency of the proposed method.

关 键 词：2-D DOA 多径环境 孔径扩展 分布式电磁矢量传感器 

分 类 号：TN974[电子电信—信号与信息处理]