Sobel Operator Based Cross-Terms Attenuation in the Wigner-Ville Distribution
Dong Liu · Yuhang jice jishu · 2007
As to multi-signals,the figure of time-frequency distribution becomes difficult to understand due to cross-terms in the Wigner-Ville distribution(WVD),a method of cross-terms attenuation in the WVD based on Sobel operator is proposed.Firstly signals gather round the origin with Ambiguity Function(AF),secondly AF is filtered with Sobel operator as filter operator.Finally the WVD with cross-term attenuation is obtained by 2-D Fourier transformation.Experiments demonstrate the efficiency of the method in cross-term suppression in the WVD.