基于改进波束域MUSIC算法的高分辨方位估计

Study of the high resolution DOA estimation technology based on the modified beamspace MUSIC algorithm

波束域MUSIC算法在波束域高分辨目标方位估计算法中是最具代表性的方法.和阵元域处理相比,波束域处理具有计算量小、分辨信噪比门限低的优点.文中论及窄带信号的波达方向估计问题,提出了高分辨处理的一种改进的波束域MUSIC算法.仿真计算表明,这种改进算法改进了信号的分辨信噪比门限.

The beamspace MUSIC algorithm is the most representative method of beamspace high-resolution direction-of-arrival （DOA） estimation. Comparing with the operation in element space, the operation in beamspaee has the advantages of reducing computational complexity, lower SNR resolution thresholds and more robust feature. This paper presents the problem of determining the DOA of narrow-band emitter signals impinging on an antenna array. A modified beamspace MUSIC algorithm for high-resolution array processing is proposed. Simulation results show the improved performance of the proposed estimator at threshold signal-to-noise ratio.