基于均匀圆阵的信源相干结构的估计  

Estimation of source coherency structure (SCS) for uniform circular array

作　　者：马常霖[1] 彭应宁[1] 田立生[1] 

机构地区：[1]清华大学电子工程系

出　　处：《清华大学学报（自然科学版）》1998年第3期45-48,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金

摘　　要：提出了一种估计均匀圆阵信源相干结构的方法，该方法首先利用空间预处理技术将阵元空间内的均匀圆阵变换成模式空间内的均匀线阵，然后在模式空间内对该均匀线阵进行平滑处理，形成平滑子阵序列，获得平滑秩图。该平滑秩图与信源相干结构有着特定的对应关系，利用该关系以及信源估计准则可最终估计出信源相干结构。实验证明该方法是一种较为有效的检测方法，可基于均匀圆阵成功地估计出信源的相干结构。An effective method to estimate the source coherency structure for uniform circular array is presented in this paper. By utilizing preprocessing technique this novel approach at first transforms the uniform circular arrays (UCA) in element space into a virtual uniform linear array (ULA) in modespace of which the manifold matrix is of Vandermonde structure. By means of spatial smoothing a special telescoping submatrix sequence can be obtained, from which the smoothed rank profile (SRP) of the virtual ULA can be determined. In this paper the SRP is the key to estimate the source coherency structure and total signal number. The algorithm is summarized in details in paper and simulations have been conducted which demonstrated the effectiveness of this approach.

关 键 词：信源相干结构 平滑子阵序列 阵列信号处理 

分 类 号：TN911.7[电子电信—通信与信息系统]