Y形阵列宽带信号二维来波方向估计

2-D direction of arrival estimation for wideband signals based on Y-shaped array

摘要:

利用Y形阵列结构的特点,提出一种宽带信号二维来波方向的估计方法.该方法在相干信号子空间法的基础上,通过采用流型矩阵展开的方式获得聚焦矩阵,并针对聚焦后的协方差矩阵,利用基于子阵的ESPRIT算法和二维MUSIC算法进行联合估计,从而提高了测向精度且减小了谱峰搜索的范围.理论分析和计算机仿真实验表明,该方法对于非相干信号源和相干信号源都具有较好的估计效果,并具有较低的计算量.

Abstract:

A 2-D direction of arrival(DOA) estimation method for wideband signals is proposed for the advantage of Y-shaped array.Based on the coherent signal-subspace method(CSM),focusing matrix is computed by expanding steering matrix.Furthermore this method adopts ESPRIT algorithm based on subarray and 2-D MUSIC together to improve the estimation precision and to reduce the range of peak searching.Theoretical analysis and computer simulation demonstrate its correctness both for incoherent sources and coherent sources,and the computational effort is reduced remarkably.