基于正交性检测的宽带DOA快速估计算法

Fast Algorithm for Wideband Direction of Arrival Estimation Based on Orthogonality Testing

基于子空间的正交特性,给出了一种宽带信号波达方向(DOA)快速估计算法.应用正交性检测获得方向估计,无需预处理,成功避免了预处理误差给估计结果带来的影响;通过频谱分析只选取能量集中的少数窄带频段数据进行角度估计,大大降低了奇异值分解的矩阵规模,可做到快速实时;在对信号能量比较充分利用的同时也保证了算法的高分辨率.计算机仿真验证了该算法的有效性和快速性.该算法可以应用于任意阵列.

Based on the orthogonality of the subspace, a fast algorithm for wideband direction-of-arrival （DOA） estimation is proposed. It estimates the DOAs by testing the orthogonality and does not require any preprocessing for initial values. Only a few frequency components having high SNR of the sources are chosen for processing, the computational complexity is effectively reduced. Meanwhile, the fast algorithm has a high resolution and can be used with an arbitrary array. Computer simulations demonstrate the efficacy of the proposed algorithm.