抑制Winger-Ville分布交叉项的新方法

New method to suppress cross-terms of Wigner-Ville distribution

提出了一种可行的检测Wigner-Ville分布交叉项并将其抑制掉的新方法。Cohen类时频分布之一的Margenau-Hill分布同Wigner-Ville分布一样,拥有众多的优良特性,但它和后者交叉项在时频面上的分布却有天壤之别。于是,根据两种分布交叉项在时频面的特点将交叉项检测出来,进而设计二维遮蔽滤波器将交叉项移除。最后的仿真表明了该方法的可行性。

A new method was proposed to suppress the cross-terms of Wigner-Ville distribution.First the cross-terms were detected between the Wigner-Ville and the Margenau-Hill distributions based on the geometry difference of cross-terms representation then a mask filter was designed to eliminate them.Finally the results of simulation indicate that this technique is feasible.