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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。
A method of estimating the coherent structure of a uniform circular array source is proposed in this paper. Firstly, a uniform circular array in the array element space is transformed into a uniform linear array in the pattern space by using the space preprocessing technique. Then, The linear array is smoothed to form a smooth sub-array sequence to obtain a smooth rank map. The smooth rank graph has a specific correspondence with the source coherent structure, and the source coherent structure can be finally estimated by using the relationship and the source estimation criterion. Experiments show that this method is a more effective method to detect the coherent structure of a source based on uniform circular array.