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《Acta Electronica Sinica》 2012-01
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A Realization of Time-Frequency Distributions with Complex-lag Argument for Multicomponent Signal

WANG Ran,JIANG Yi-cheng(Research Institute of Electronic Engineering Technology,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China)  
A new type of time-frequency distribution with complex-lag argument(CTD) is proposed recent years.For monocomponent signal,it provides a very high time-frequency concentration.However,for multicomponent signal,CTD realized by definition or traditional frequency domain convolution method may gain a lot of cross terms.In this paper,three aspects of modifications have been done to traditional frequency domain convolution method of CTD.A new modified frequency domain convolution method of CTD suitable for multicomponent signal is proposed.CTD realized by the method which proposed by this paper provides very high time-frequency concentration and the cross-terms are greatly reduced at the same time.This fact is proven by simulation results.
【Fund】: 国家自然科学基金(No.60872100);; 教育部博士点基金(No.20092302110032)
【CateGory Index】: TN911.7
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