重庆大学学报2013，Vol.36Issue(8)：15-18,25,5.DOI:10.11835/j.jssn.1000-582X.2013.08.003
采用STFT-Wigner变换抑制Wigner-Ville分布交叉项
Using STFT-Wigner transform to suppress the cross terms in Wiger-Ville distribution
摘要
Abstract
There is a serious crossing-term problem when Wigner-Ville distribution(WVD) is used to analyze multi-component non-stationary signals.While,using Gabor-Wigner transform(GWT) can avoid the crossing-term problem and maintain the clarity as good as WVD.But as the component frequency of multi-component signals interfere each other,GWT can't get clear-cut results.A modified STFT-Wigner is proposed to suppress the cross terms in WVD effectively and maintain the clarity.This method is proved to be practical through analyzing simulation signals and experiment signals.关键词
STFT-Wigner变换/Gabor变换/Wigner-Ville分布/信号分析/交叉项/振动频率Key words
STFT-Wigner transform / Gabor-Wigner transform/ Wigner-Ville distribution/ signal analysis/ cross terms / vibrational frequencies分类
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王见,李金同,卢华玲,尹爱军..采用STFT-Wigner变换抑制Wigner-Ville分布交叉项[J].重庆大学学报,2013,36(8):15-18,25,5.基金项目
国家自然科学基金资助项目(50905192,51105396) （50905192,51105396）
中国博士后科学基金资助项目(2011M501387) （2011M501387）
