一种基于四阶累积量的旋转不变参数估计方法

A NEW METHOD OF ESTIMATING SIGNAL PARAMETER VIA ROTATIONAL INVARIANCE TECHNIQUE BASED ON FOURTH-ORDER CUMULANTS

基于四阶累积量的几何解释 ,本文提出了一种新的旋转不变波达方向 (DOA)估计方法 ,它利用所构造出的虚拟旋转不变矩阵对来构造低维波达方向矩阵 ,并对其进行特征分解直接得到DOA估计 ,且与基于二阶统计量的旋转不变方法比较 ,阵列有效孔径扩展了一倍。

Based on the interpretation for the use of fourth order cumulants, a new ESPRIT-like method was presented. The method can be used to estimate the direction of arrival(DOA) directly from the eigenvalues of a lower-dimension DOA matrix constructed by the virtual rotational invariance matrix pencil, and gain a higher array aperture utilization than the conventional ESPRIT methoddoes. Simulation results show that the proposed method is effective.