基于MEMP算法的二维DOA估计

针对L形阵列,提出利用增广矩阵束(MEMP)进行二维DOA估计的新算法。计算两个均匀线阵的互协方差矩阵,利用MEMP方法构造增广矩阵,运用ESPRIT算法实现二维波达方向的估计,并采用一种新的配对算法,实现二维波达角的自动配对。为了克服MEMP方法对阵列有效孔径的损失,利用四阶累积量的阵列扩展的性质,提出了基于MEMP方法扩展的二维DOA估计算法,该算法增加了阵列的有效孔径,无需进行谱峰搜索。仿真实验证明了算法的有效性。

Two-dimensional DOA estimation based on MEMP algorithm

Based on L-shape arrays,a novel algorithm of two-dimensional direction of arrival estimation by matrix enhancement and matrix pencil(MEMP) is proposed.Firstly,the covariance matrix of output of the two linear arrays is computed to construct the enhanced matrix by MEMP method,and to estimate the two-dimentional DOA by the ESPRIT method.Application of this new algorithm makes the 2D angles pairing automatically.To avoid the aperture decrease,an extended MEMP algorithm using the aperture extension property of fourth-order cumulant is proposed,the algorithm increases the valid aperture of the arrays,without spectral peak searching.The effectiveness of this method is demonstrated through some simulation examples.