Nonnegative time-frequency distributions for parametric time-frequency representations using semi-affine transformation group

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	Nonnegative time-frequency distributions for parametric time-frequency representations using semi-affine transformation group
	Zou, HX ; Wang, DJ; Zhang, XD ; Li, YD
发表期刊	SIGNAL PROCESSING
	2005-09-01
卷号	85 期号:9 页码:1813-1826
文章类型	Article
摘要	This paper proposes a method for calculating a nonnegative time-frequency distribution (TFD) whose concentration is identical to that of Wigner-Ville distribution ( WD) when instantaneous frequencies (IFs) of the best-matched elementary functions of the signal under analysis are pre-estimated. This method is based on a special class of transformation group, referred to as semi-affine transformation (SAT) group. The essence of this method is to create a joint distribution by translating the values of WVDs of Morlet wavelet to the positions around IFs of the best-matched elementary functions. Theoretical predictions and numerical results indicate that the proposed strategy can result in the most visually appealing TFDs for highly nonstationary signals. (C) 2005 Elsevier B.V. All rights reserved.
关键词	Nonnegative Time-frequency Distribution Wigner-ville Distribution Fm(m)Let Transform Dopplerlet Transform Semi-affine Transformation (Sat) Group Instantaneous Frequency Parametric Atomic Decomposition Matching Pursuit
WOS标题词	Science & Technology ; Technology
关键词[WOS]	WIGNER-VILLE DISTRIBUTIONS ; HIGHER-ORDER SPECTRA ; FM(M)LET TRANSFORM ; NONSTATIONARY SIGNALS ; ATOMIC DECOMPOSITION ; CHIRPLET TRANSFORM ; PURSUIT
收录类别	SCI
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Electrical & Electronic
WOS记录号	WOS:000230803200010
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/9175
专题	09年以前成果
作者单位	1.Tsing Hua Univ, Dept Automat, Beijing 100084, Peoples R China 2.Tsing Hua Univ, State Key Lab Intelligent Technol & Syst, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China 4.Tsing Hua Univ, Dept Math Sci, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Zou, HX,Wang, DJ,Zhang, XD,et al. Nonnegative time-frequency distributions for parametric time-frequency representations using semi-affine transformation group[J]. SIGNAL PROCESSING,2005,85(9):1813-1826.
APA	Zou, HX,Wang, DJ,Zhang, XD,&Li, YD.(2005).Nonnegative time-frequency distributions for parametric time-frequency representations using semi-affine transformation group.SIGNAL PROCESSING,85(9),1813-1826.
MLA	Zou, HX,et al."Nonnegative time-frequency distributions for parametric time-frequency representations using semi-affine transformation group".SIGNAL PROCESSING 85.9(2005):1813-1826.