酉矩阵束方法在波达方向估计中的应用

Application of unitary matrix pencil method to Direction-of-Arrival estimation

空间目标方位估计技术广泛应用于众多军事及国民经济领域,其中矩阵束方法(Matrix Pencil,MP)是广大学者研究的热点技术之一。首先对传统矩阵束方法的基本原理进行介绍,并针对传统方法在低信噪比条件下的方位估计精度明显下降问题,结合酉变换技术,对传统方法进行改进。理论分析及计算机仿真研究表明:基于酉变换的矩阵束方位估计方法在低信噪比条件下具有更高的估计精度及空间目标分辨能力,同时也表明该方法具有更优的有效性和正确性。

Direction-of-Arrival （DOA） estimation techniques have been widely applied to many military and civil economy fields. Especially, matrix pencil method is one of the hottest technologies for general scholars. First, it introduces the basic theory of traditional matrix pencil method. To the problem of a dramatic decline of DOA estimation accuracy for traditional method in low-SNR （Signal Noise Ratio） condition, existing method is improved in combination with the unitary transformation technology. The study of theory analysis and computer simulation show that unitary matrix pencil method in DOA estimation has higher estimation accuracy and space resolution under scenarios of low-SNR, and proves that the proposed method is effective and correct.