基于子空间投影角度配对的L型阵列二维DOA估计算法

An L-Shaped 2-D Direction of Arrival Estimation Based on Subspace Projection Pair Matching

针对传统二维MUSIC角度估计计算量巨大的缺点,及Root-MUSIC算法可减少计算量却无法完成角度配对的问题,提出了一种基于子空间投影角度配对的L型阵列二维DOA估计算法。该方法利用Root-MUSIC算法估计L型阵列的角度参数,并利用子空间投影完成方位角和俯仰角的角度匹配,从而得到正确的二维DOA结果。计算机仿真验证了该方法的有效性。

The computation complexity of conventional 2-dimensional multiple signal classifica- tion （2-D MUSIC） method is very high, which can be reduced by the Root-MUSIC algorithm. However,the automatic pair matching cannot be obtained in the Root-MUSIC method. In order to solve the aforementioned problem, a 2-dimensional direction of arrival （DOA） estimation al- gorithm based on the subspace projection pair matching is proposed for L-shaped array. In the proposed method, the angle parameters of two perpendicular linear arrays in the L-shaped array are obtained by the 1-D Root-MUSIC method. In the following, the pair matching of azimuth and elevation angles can be achieved by the subspace projection operation. The effectiveness of proposed method is demonstrated by the simulation data.