基于扩展孔径波达方向矩阵法的高精度二维DOA估计

 该文针对扩展孔径会产生估计模糊的现象，提出一种高精度扩展孔径波达方向矩阵算法。算法由个阵列单元组成双平行阵列几何结构，利用阵列传感器沿轴和沿轴的不同间距，分别构造波达方向矩阵，由此计算出高精度模糊的方向余弦估计和低精度无模糊的方向余弦估计，然后利用低精度无模糊的方向余弦估计值对高精度模糊的方向余弦估计值进行解模糊处理，得到高精度无模糊的方向余弦的估计值。该算法无需配对运算和2维搜索，是一种低运算量高精度的算法，计算机仿真实验验证了该算法的性能。

Extended Aperture DOA Matrix Method for High Accurate 2D Direction Estimation

This paper proposes a new high accurate azimuth and elevation angle estimation algorithm using DOA matrix method to avoid the ambiguous of extended aperture. The algorithm uses 4array elements to form two-parallel-shape array geometry, high-variance unambiguous direction cosine estimates and low-variance cyclically ambiguous direction cosine estimates are obtained from the different sensors space. The key idea underlying of this algorithm is to use the high-variance unambiguous direction cosine estimates to resolve the low-variance cyclically ambiguous direction cosine estimates to extract azimuth-elevation angle estimates. The proposed algorithm requires no pair matching procedure and 2D iterative searching, and thereby, offering high estimation precision with low computational complexity. The simulation results indicate the performance of proposed algorithm.