基于级联 MUSIC 的面阵中的二维 DOA 估计算法

摘要

The problem of two-dimensional (2D)direction of arrival (DOA)estimation for planar array is discussed,and a successive multiple signal classification (MUSIC)algorithm therein is proposed.The proposed algorithm uses successive one-dimensional searches to achieve the joint estimation of 2D DOA.The proposed al-gorithm which requires the one-dimension local searches can avoid the high computational cost within the classi-cal 2D-MUSIC algorithm,and its estimation performance is close to the classical 2D-MUSIC algorithm perfor-mance.The proposed algorithm can obtain automatically-paired 2D DOA estimation for planar array,and it has better DOA estimation performance than the propagator method (PM)and estimation of signal parameters via the rotational invariance technique algorithm.Furthermore,it works well for the sources with the same azimuth (or elevation).Combined with high performance and low complexity,the proposed algorithm has a broader ap-plication scope.Simulation results verify the usefulness of the proposed algorithm.%提出了适用于面阵中的基于级联多重信号分类（multiple signal classification，MUSIC）方法的二维波达方向（direction of arrival，DOA）估计算法。该算法仅采用级联的一维搜索即可实现二维 DOA 的联合估计，避免了经典二维 MUSIC 算法的复杂计算量，复杂度大大降低，同时角度估计性能非常接近经典二维 MUSIC 算法。此算法可以实现二维角度的自动配对，角度估计性能优于传播算子算法（propagator method，PM）以及借助于旋转不变技术的信号参数估计算法。同时，该算法可以很好地估计出相同方位角（或仰角）的信源。结合算法的高性能及低复杂度，该算法拥有更广泛的适用范围，其优越性得到验证。