基于声矢量阵的宽带波束域高分辨方位估计

High Resolution DOA Estimation of Wide-band Beam Space based on Acoustic Vector Array

宽带信号波束域处理是实现水下目标高分辨方位估计的重要途径,它相对阵元域具有运算量小、分辨信噪比门限低以及角度分辨力高的优点。声矢量阵单个阵元能同时测量声场中的声压量和3个正交的质点振速分量,相对于声压阵,它能获取更多的声场信息。因此通过均匀声矢量阵运用MUSIC算法对宽带信号源波束域DOA估计进行了研究,改善了对弱相干信号源的方位分辨和估计性能,实验所获得的仿真结果表明了该方法具有较高的参考价值。

Wide-band beam space processing is an effective technique to realize broadband DOA estimation of underwater targets. Compared with the element-space, wide-band beam space processing offers much more advantages in SNR resolution threshold and angle resolution. Each element of acoustic vector array measures the acoustic pressure and three orthogonal components of acoustic particle velocity in a sound field. The main advantage of these vector sensors over traditional scalar sensor is that they make use of more available acoustic information. So in this paper, wideband beam-space high resolution bearing estimation techniques are studied thoroughly based on MUSIC algorithm, this new method maintains good DOA estimation and spatial resolution capability in weak correlated source signals. The better simulation results indicate that the method has the much value of reference.