基于滤波器组的改进型Wigner-Ville分布

The improved Wigner-Ville Distribution based on filter bank

针对时频分析中频谱图和Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布（ＷＶＤ）的不足，本文采用了一种滤波器组和ＷＶＤ相结合的方法，并对这种改进的分布的性质进行了分析。最后举出实际倒了说明它与其他几种常用的时频分析方法相比保留了ＷＶＤ能量集中的特性，而同时能够减少ＷＶＤ带来的交叉项和人工产物，并能减少噪声的影响。

With the defect of spectrogram and Wigner-Ville Distribution(WVD), this paper put forward a method which combines the filter bank and WVD, then investigated properties of this improved distribution. In the end of this paper practical example illustrated that compared with common used time-frequency analysis methods it retains energy concentration, reduces the cross-terms, artifacts and the effects of noise at the same time.