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多尺度分析在激光微多普勒效应特征提取中的应用
引用本文:盛美菊,原帅,王建华,张骏.多尺度分析在激光微多普勒效应特征提取中的应用[J].应用光学,2008,29(4):585-589.
作者姓名:盛美菊  原帅  王建华  张骏
作者单位:烟台大学,光电信息学院,山东,烟台,264005
摘    要:由于小波变换具有准确度高、抗噪性好等优点,在微多普勒效应探测方面具有很好的应用前景。利用多尺度分析(MRA)将信号进行分解并提取出含有微多普勒效应的低频平滑信息,获取了目标微小振动引起的微多普勒效应。用频谱分析和基于瞬时频率(Instfreq)的时-频域联合分析方法对原始信号及通过MRA分解得到的结果进行了对比研究。结果表明:利用时-频分析对MRA处理后的低频信号进行分析,可更加有效地提取微多普勒效应中振动信号的特征,为目标特征的识别、分类和探测提供了便利。

关 键 词:微多普勒效应  多尺度分析  时-频分析-瞬时频率
收稿时间:2008/1/15

Application of multi-resolution analysis in extraction of laser micro-Doppler effect features
SHENG Mei-ju,YUAN Shuai,WANG Jian-hua,ZHANG Jun.Application of multi-resolution analysis in extraction of laser micro-Doppler effect features[J].Journal of Applied Optics,2008,29(4):585-589.
Authors:SHENG Mei-ju  YUAN Shuai  WANG Jian-hua  ZHANG Jun
Institution:Institute of Opto-electronic Information, Yantai University, Yantai 264005, China
Abstract:The wavelet transform has an excellent application prospect in the detection of micro-Doppler effect because of its high precision and good noise immunity. The signal was decomposed into the minutia part of every scale with the multi-resolution analysis (MRA) in order to extract the low pass signal which contains the micro-Doppler effect features. The micro-Doppler effect, which was caused by the miniature vibration of the target, was acquired. The comparison studies for the original signal and the result obtained with MRA decomposition were implemented by the frequency analysis and time-frequency domain joint analysis based on the instantaneous frequency (Instfreq). The result indicates that the extractration of the vibrating signal features from the micro-Doppler effect can be more effective if the low-frequency signal is analyzed by the time-frequency analysis after it is processed with MRA. It provides a convenient method for the recognition, classification and detection of the target features.
Keywords:micro-Doppler effect  multi-resolution analysis  time-frequency analysis  instantaneous frequency
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