累量域高分辨率二维波达方向估计算法

High Resolution Algorithm for Two Dimensional Direction Finding of Non Gaussian Sources

提出了一种利用虚拟双线性平行阵进行累量域高分辨率二维波达方向（ＤＯＡ）估计的新算法．该算法将累量用于协方差的计算，构造了一个虚拟ＤＯＡ矩阵（ＶＤＯＡＭａｔｒｉｘ），并基于此矩阵进行波达方向估计．理论分析表明，对虚拟ＤＯＡ矩阵进行特征值分解，就可以得到源信号的二维ＤＯＡ估计．同时由于累量对高斯噪声的自然盲性，因而算法具有稳健性．该算法的另一特点是可以提供虚拟扩展孔径，提高了孔径的利用率．

An algorithm is developed that computes the covariance with cumulant and constructs a virtual direction of arrival(VDOA) matrix using two parallel linear arrays. The analysis shows that the eigen decomposition of the VDOA matrix could be used to estimate direction of arrival in two dimensions. The cumulant being insensitive to additive noise, virtual use of aperture can be made to enhance it actual performance.