一种修正的相干信号二维DOA估计方法  

A Modified Algorithm for 2D DOA Estimation of Coherent Signals

作　　者：王爱莹[1] 朱立东[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室

出　　处：《现代军事通信》2014年第2期27-31,共5页

基　　金：国家863计划项目资助（编号2012AA01A502）.

摘　　要：文章提出一种基于六角形阵列二维ESPRIT算法的相干信号DOA估计的方法。针对六角形阵列的结构特点，首先对各个阵元的接收数据求其共轭矩阵来扩展阵列，扩展后的阵列可分为四条含有相同阵元的平行的均匀线性子阵列；在此基础上，选取任意两组平行阵列作为标准二维ESPRIT算法的阵列；又根据线性阵列的特点，利用一次前后向空间平滑方法实现解相干的目的；最后利用二维ESPRIT算法进行DOA估计。该算法增加了可利用阵元的个数，具有一定的去相干性能，避免了大量的计算，并且能够得到较好的估计性能。最后，通过计算机仿真证实了该算法的有效性。A modified algorithm of 2D DOA estimation of coherent signals is put forward by extending re- construction of the correlation matrix. Given the structural feature of the hexagonal array, we can extend the array by getting the conjugate matrix of the receiving data of each array element, and the extended ar- ray can be divided into four parallel linear arrays with the same number of elements. Then we can select any two sets of parallel array as a standard 2D ESPRIT algorithm of array, and use a before and after of space smoothing method to implement the DOA estimation of coherent signals. The proposed algorithm increases the number of elements that can be used, has the ability to coherent signals, avoids a large a- mount of calculation, and can get a better estimation performance for DOA estimation. Computer simula- tion demonstrates the effectiveness of the algorithm.

关 键 词：相干信源 六角形阵列 共轭虚拟扩展阵列 空间平滑法 二维ESPRIT算法 

分 类 号：TN911.7[电子电信—通信与信息系统]