基于高阶循环平稳特性的二维波达方向估计算法

Two Dimension DOA Estmation Algorithm by Exploiting Higher-Order Cyclostationarity

本文提出了一种利用虚拟双线性平行阵的循环累量域二维波达方向 （ＤＯＡ）估计算法。该算法构造了一个虚拟ＤＯＡ循环矩阵（ＶＤＯＡ Ｃｙｃｌｉｃ Ｍａｔｒｉｘ），井基于此矩阵进行ＤＯＡ估计。理论分析表明，通过对虚拟ＤＯＡ循环矩阵的特征值分解，就可以得到源信号的二维ＤＯＡ估计。同时由于循环累量对高斯噪声的自然盲性和对信号的选择性，该算法具有循环域和累量域ＤＯＡ估计算法的良好性能。该算法的另一特点是可以提供虚拟扩展孔径，提高了ＤＯＡ估计的性能．

in this paper, a new too-dimension Directioon - of- Arrival(DOA) estimation algorithm via two virtual parallel liners arrays n cyclic cumulant domain is presented. Th algorithm constructs a new matrix calld virtu- al DOA cyclic matrix(VDOA) Cyclic Matrix) to estimate the DOA. The theoretical analysis shows that the two-dimension DOA of the sources can be foUnd through the eigendecomposition of VDOA Cyclic Matrix. Because the cyclic cumulant s insenstive to additve Gaussian noise and has signal selectivty, the algorithm has the advantage of the DOA estimation algorithms in cyclic domain and cumulant domain, it ho bas the ability to extend array apertur, so that the direction finding performance i s enhanced.