任意阵形水声组合阵列的波达方向盲估计

Blind estimation of direction of arrival about arbitrary configuration hydrophone array

基于声压水听器阵列的高分辨波达方向估计方法,需要精确已知基阵的阵列流型,但在实际声呐工程中,阵列流型的精确测量和校准十分困难。针对上述问题,将单矢量水听器与任意阵形声压水听器阵列组合,并引入盲源分离理论,提出了一种基于任意阵型水声阵列的波达方向盲估计方法。仿真实验表明,在目标信号先验信息和阵列流型未知的情况下,该方法可分离出各目标信号及其阵列流型,然后利用单矢量水听器振速分量的正交性,估计出各目标信号的方位角和俯仰角,并且该方法无需谱峰搜索和参数配对,适合存在一维角度兼并的情况。

Highresolutionmethodsofdirectionofarrival（DOA）estimationrequireprecise knowledge about the array manifold. Unfortunately, it is difficult to measure and calibrate the array manifold in real sonar situations. In response to this problem,a new method for DOA estimation based on arbitrary hydrophone array configuration is proposed. The new method combines acoustic pressure hydrophone with single vector hydrophone array, and introduces the technique of the blind source separation （ BSS） . With no priori information of source and array manifold, the array manifold is estimated, and the sources are separated. Finally, with the orthogonality of the components of particle velocity the DOA are estimated. The new method can handle sources with common 1-D angles with neither peak searching nor parameter pairing.