单矢量水听器时空变换技术研究  

Research on Time-space Transform Technology Using a Single Vector Hydrophone

作　　者：梁国龙 马巍[1] 范展 王逸林[1] 

机构地区：[1]哈尔滨工程大学水声技术国家重点实验室,黑龙江哈尔滨150001

出　　处：《兵工学报》2013年第2期229-234,共6页Acta Armamentarii

基　　金：国家自然科学基金项目(51279043)

摘　　要：提出了一种基于单矢量水听器的信号处理新技术。方法通过对单矢量水听器各通道时域采样数据进行分解,将单矢量水听器等效虚拟为具有空间孔径的半波均匀直线阵。与单矢量水听器相比,虚拟后的阵列具有更窄的空域指向性波束。利用虚拟阵列的快拍数据可完成对空间目标方位估计,且可对宽带和窄带信号在频率或时域进行处理。新方法无需进行阵列流型的校正,因而具有更强的鲁棒性。理论分析和计算机仿真表明,在各向同性噪声场中,对于窄带或宽带目标,新方法具有比单矢量水听器MUSIC算法更好的方位估计性能。湖上试验验证了算法的有效性。A new signal processing technology based on single vector hydrophone was proposed. The method equivalently constructs a virtual aperture of a half wavelength distance uniform linear array from a single vector hydrophone by decomposing the time-domain sample data of different channels of the hydro- phone. Compared with a single vector hydrophone, the virtual array has a narrower space beam. Azimuth of spatial target can be estimated using the virtual array snapshots for wide-band or narrow-band signal in frequency domain or time domain. The new method is robust for no need of a correction of array mani- fold. The theoretic amalysis and the computer simulation show that the new algorithm has a better per- formance of estimating a narrow-band or wide-band signal in the isotropic noise field compared to single vector hydrophone MUSIC algorithm.

关 键 词：信息处理技术 单矢量水听器 DOA估计 时空变换 

分 类 号：TB566[交通运输工程—水声工程]