三平行线阵中基于改进传播算子的二维DOA估计方法

提出了一种三平行线阵中基于改进传播算子的二维波达方向估计方法。该方法针对三平行阵列的结构特点，利用三平行线阵中两个相互垂直的双平行线阵，分别构造一个扩展传播矩阵，求得旋转矩阵。然后根据三平行线阵的特性，对分别得到的旋转矩阵进行配对。最后利用配对后的旋转矩阵，联合估计信号的方位角和俯仰角。该方法当俯仰角在70°~ 90°之间时不会出现角度估计失效问题，充分利用了所有阵元信息，提高了角度估计性能，而且具有更低的计算复杂度。仿真验证了提出方法的有效性。 

2-D DOA Estimation Algorithm for Three-Parallel ULAs Based on Improved Propagator Method

A two-dimensional direction of arrival estimation method is proposed for three-parallel uniform linear arrays based on improved propagator method. Considering the geometric characteristic of the three-parallel ULAs, we obtain the rotational matrices by constructing an extended propagator matrix respectively for two vertical two-parallel ULAs of the three-parallel ULAs. Then the rotational matrices are paired by utilizing the feature of the three-parallel ULAs. Finally, the azimuth and elevation are jointly estimated by the paired rotational matrices. The proposed method has no estimation failure when the elevation angles are between 70° and 90°, and it makes full use of the elements, which improves the angle estimation performance with lower complexity. Simulation results demonstrate the effectiveness of the proposed algorithm.