一种基于L型阵列的二维波达方向估计的新方法

提出了一种在高斯白噪声环境下基于L型阵列的二维DOA估计的新方法。该算法利用阵列结构的特点首先计算3个互相关矩阵,然后用这3个互相关矩阵构造一个特殊的大矩阵,对其进行特征值分解获得信号子空间的估计,进而利用二维ESPR IT方法实现方向角与仰角的估计。该方法不需要谱峰搜索,能够很好地解决参数配对问题。仿真试验表明,该算法估计精度高、计算量小,有一定的实用性。

New method for estimating two-dimensional direction of arrival based on L-shape array

Based on an L-shape array,a novel method for estimating two-dimensional direction of arrival(DOA) was presented.The array geometries were employed by the algorithm to calculate the three cross correlation matrixes which are used to construct a special large matrix,then the signal subspace estimation was obtained via the eigendecomposition of the constructed matrix,and the estimation of the angles of direction and elevation was achieved by the 2D ESPRIT method.Without spectral peak searching and complex computation,this algorithm works well for pairing among parameters.The simulated results show that this method is characterized by high precision,low computation cost and good practicability.