稀疏双圆阵二维波达方向估计  

Two-dimensional DOA Estimation of Sparse Double Circular Array

作　　者：晏辉 司伟建[1,2] 夏新凡 YAN Hui;SI Wei-jian;XIA Xin-fan(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Key Laboratory of Advanced Marine Communication and Information Technology,Ministry of Industry and Information Technology,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Shanghai Radio Equipment Research Institute,Shanghai 201109,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学先进船舶通信与信息技术工业和信息化部重点实验室,黑龙江哈尔滨150001 [3]上海无线电设备研究所,上海201109

出　　处：《制导与引信》2021年第3期32-38,共7页Guidance & Fuze

基　　金：航空科学基金(2019010P6001,2019010P6002)。

摘　　要：针对稀疏圆阵二维测向,提出了一种快速波达方向(direction of arrival,DOA)估计方法。该方法利用稀疏双圆阵中子阵接收数据的协方差矩阵构造波达方向矩阵,求解俯仰角;然后通过波束空间变换将圆阵变为导向矢量具备范德蒙结构的虚拟线阵;再对波束域导向矢量进行补偿,消除阵列稀疏情况下波束空间变换带来的误差影响;最后用求根多重信号分类算法估计信号的方位角,完成稀疏圆阵的二维DOA估计。该方法无需二维谱峰搜索,方位角和俯仰角自动配对,所用阵元数少,分辨率高。计算机仿真实验验证了所提方法的正确性。A fast direction of arrival(DOA)estimation method is proposed for two-dimensional direction finding of sparse circular arrays.In this method,the receiver-vector covariance matrix of two subarrays in a sparse double circular array is used to construct the DOA matrix to calculate the pitch angle of the signal.Then the circular array is transformed into a virtual linear array by beam space transformation,and the guide vector of the virtual linear array has Vandermonde structure.Secondly,the beam domain guide vector is compensated to eliminate the errors caused by the beam space transformation of sparse array.Finally,the root multiple signal classification algorithm is used to estimate the azimuth angle of the signal,and the two-dimensional DOA estimation of the sparse circular array is completed.The method does not need to search the two-dimensional spectral peak,and the azimuth angle and pitch angle are matched automatically.The method requires less array elements and has high resolution.The correctness of the proposed method is verified by computer simulations.

关 键 词：信号处理 稀疏圆阵 高度相关信号 波达方向估计 

分 类 号：TN911.7[电子电信—通信与信息系统]