基于虚拟阵列的ESPRIT相干信号DOA估计  

DOA Estimation of ESPRIT for Coherent Signal Based on Virtual Array

作　　者：刘宁[1,2] 史浩山[2] 郭淑霞[1] 杨博[1] 

机构地区：[1]西北工业大学无人机特种技术重点实验室 [2]西北工业大学电子信息学院,陕西西安710072

出　　处：《西北工业大学学报》2013年第6期997-1001,共5页Journal of Northwestern Polytechnical University

基　　金：教育部博士点基金(20050699037);航天支撑基金资助

摘　　要：提出一种基于虚拟阵列的相干信源DOA估计方法。利用接收数据及其共轭信息,重新构造子阵数据矩阵,在不损失有效工作阵元情况下采用运算量小的修正C-ESPRIT方法实现非圆信号在任意初始相位下的相干信号估计。仿真结果表明,VC-ESPRIT算法有效地消除信号初始相位对相干信号C-ESPRIT算法的影响,并且在低信噪比下性能明显优于前后向空间平滑ESPRIT。A method of DOA estimation based on virtual array is presented in the presence of coherent signals .U-sing the received dates and its conjugate information , we reconstructed array data matrix .Using the modified C-ES-PRIT, which has small amount of calculation , we estimated the non-circular coherent signal of arbitrary phase with-out array aperture reduction and effective element loss .The simulation results and their analysis show preliminarily that VC-ESPRIT eliminates the limitation of coherent source DOA estimation for C-ESPRIT algorithm and that its performance is better than forward-backward spatial smoothing ESPRIT .

关 键 词：运算法则 仿真计算 DOA 估计 数学模型 矩阵运算 均方根误差 蒙特卡洛 天线阵列 SNR ESPRIT 修正 空间平滑 虚拟阵列 

分 类 号：TN911.7[电子电信—通信与信息系统]