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	A DIRECT EVALUATION OF MONO-COMPONENTS BY INSTANTANEOUS FREQUENCY
	Niu, Kaifu ; Peng, Lizhong ; Peng, Silong
	2012
关键词	Mono-component signal instantaneous frequency envelope offset of local extremum weak intrinsic mode function EMPIRICAL MODE DECOMPOSITION SIGNAL DECOMPOSITION
英文摘要	We present a new criterion based on instantaneous frequency (IF) to distinguish mono-components (MCs). We first notice that the "offset of local extremum" caused by low-frequency envelope is often significant on envelope extraction, which determines the calculation of IF for MCs. We estimate the upper and lower bounds of the offset for a general family of signals. Conducted by the offset estimation, we propose a direct and effective algorithm to calculate IF. Our algorithm, which is based on an empirical pursuit of knots and natural splines, provides an accurate estimation of the envelope and derives a well-behaved IF. A theoretical explanation for the good approximation of proposed envelope is also stated. Experiment results show the fast convergence of our algorithm, which leads to a reliable IF and local mean to provide a flexible criterion for MC classification. We emphasize that it is important to pursue a certain balance among different requirements to define MC depending on specific applications.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000304675400008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Computer Science, Software Engineering; Mathematics, Interdisciplinary Applications; SCI(E); EI; 1; ARTICLE; 3; 10
语种	英语
出处	EI ; SCI
出版者	international journal of wavelets multiresolution and information processing
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/314396]
专题	数学科学学院
推荐引用方式 GB/T 7714	Niu, Kaifu,Peng, Lizhong,Peng, Silong. A DIRECT EVALUATION OF MONO-COMPONENTS BY INSTANTANEOUS FREQUENCY. 2012-01-01.

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