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兵工学报 ›› 2013, Vol. 34 ›› Issue (2): 229-234.doi: 10.3969/j.issn.1000-1093.2013.02.016

• 研究论文 • 上一篇    下一篇

单矢量水听器时空变换技术研究

  

  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
  • 上线日期:2013-07-22

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

  1. Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, Heilongjiang, China
  • Online:2013-07-22

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。

关键词: 信息处理技术, 单矢量水听器, DOA估计, 时空变换

Abstract:

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 hydrophone. 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 manifold. The theoretic amalysis and the computer simulation show that the new algorithm has a better performance of estimating a narrowband or wideband signal in the isotropic noise field compared to single vector hydrophone MUSIC algorithm.

Key words:  information processing, single vector hydrophone, DOA estimation, time-space transform