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A DIRECT EVALUATION OF MONO-COMPONENTS BY INSTANTANEOUS FREQUENCY

文献类型：期刊论文

作者Niu, Kaifu1; Peng, Lizhong1; Peng, Silong2
刊名INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING
出版日期2012-05-01
卷号10期号:3
关键词Mono-component signal instantaneous frequency envelope offset of local extremum weak intrinsic mode function
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.
WOS标题词Science & Technology ; Technology ; Physical Sciences
类目[WOS]Computer Science, Software Engineering ; Mathematics, Interdisciplinary Applications
研究领域[WOS]Computer Science ; Mathematics
关键词[WOS]EMPIRICAL MODE DECOMPOSITION ; SIGNAL DECOMPOSITION
收录类别SCI
语种英语
WOS记录号WOS:000304675400008
源URL[http://ir.ia.ac.cn/handle/173211/2912]  
专题自动化研究所_智能制造技术与系统研究中心_多维数据分析团队
作者单位1.Peking Univ, LMAM, Sch Math Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Niu, Kaifu,Peng, Lizhong,Peng, Silong. A DIRECT EVALUATION OF MONO-COMPONENTS BY INSTANTANEOUS FREQUENCY[J]. INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING,2012,10(3).
APA Niu, Kaifu,Peng, Lizhong,&Peng, Silong.(2012).A DIRECT EVALUATION OF MONO-COMPONENTS BY INSTANTANEOUS FREQUENCY.INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING,10(3).
MLA Niu, Kaifu,et al."A DIRECT EVALUATION OF MONO-COMPONENTS BY INSTANTANEOUS FREQUENCY".INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING 10.3(2012).

入库方式： OAI收割

来源：自动化研究所

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