文章摘要
谢磊,李秀坤.HHT在水雷目标特征提取中的应用[J].声学技术,2009,(4):480~484
HHT在水雷目标特征提取中的应用
The application of HHT to feature extraction of mine
投稿时间:2008-06-14  修订日期:2008-08-20
DOI:
中文关键词: HHT  亮点  特征提取  边际谱
英文关键词: HHT  highlight  feature extraction  marginal spectrum
基金项目:
作者单位E-mail
谢磊 中船重工集团第七二六研究所, 上海, 201108 saintlei@163.com 
李秀坤 哈尔滨工程大学, 哈尔滨, 150001  
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中文摘要:
      Hilbert-Huang变换(HHT)是近年来发展起来的一种处理非线性非平稳的时频分析方法。水声信号具有非线性非平稳的特点,把HHT方法应用于水声信号的分析中,将典型主动声纳信号的Hilbert边际谱和Hilbert谱分别与傅里叶幅度谱和传统的时频分析进行了比较。然后对水下目标回波的亮点模型作了仿真研究,并与小波变换作比较,最后用实际目标的回波作了分类研究。仿真与实际数据都证明了HHT在水下目标特征提取中的优越性。
英文摘要:
      Hilbert-Huang Transform (HHT) is a time-frequency analytic method of nonlinear and non-stationary signal. It decompose signal as a small number of "intrinsic mode functions"(IMF) to get the energy-frequency-time distribution (Hilbert spectrum), then get the marginal spectrum. Because the underwater acoustic signal has nonlinear and non-stationary characteristic, the marginal spectrums of classical underwater acoustic signals are compared with Fourier spectrum. Then the research on the highlight mode simulink of underwater targets and the comparison with the wavelet analysis are made. Finally the classification study with real data is made to show prove the advantage of HHT in the feature extraction of underwater target.
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