气候变化领域集成服务门户(CCPortal): Estimating the parameters of ultrasonic echo signal in the Gabor transform domain and its resolution analysis

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DOI	10.1016/j.sigpro.2015.10.006
	Estimating the parameters of ultrasonic echo signal in the Gabor transform domain and its resolution analysis
	Lu, Zhenkun; Yang, Cui; Qin, Donghong; Luo, Yuling
发表日期	2016
ISSN	0165-1684
起始页码	607
结束页码	619
卷号	120
英文摘要	The accurate estimation of parameters of an ultrasonic signal is essential in ultrasonic non-destructive testing (NDT). In this paper, a novel method for parameter estimation based on the Gabor transform (GT) is proposed. Firstly, the GT is used in ultrasonic signal processing in order to estimate time of flight (TOF) and center frequency (CF) by calculating where maximum modulus of Gabor transform function of the signal is attained. The quasi-Newton method is employed to improve the estimation accuracy and reduce computational complexity. The Gabor transform function of the signal has an analytic expression which contributes to derive other estimators relating to TOF and CF such as bandwidth factor, phase and amplitude. The parameters of multi-component echo signal are estimated by estimating the parameters of each component successively. Numerical simulation has been carried out to show the performances of the proposed method in estimating parameters of ultrasonic signal. (C) 2015 Elsevier B.V. All rights reserved.
英文关键词	Ultrasonic Parameter estimation; Gabor transform; Gaussian model; CRLB; Quasi-Newton method
WOS研究方向	Engineering
WOS类目	Engineering, Electrical & Electronic
来源期刊	SIGNAL PROCESSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158555
作者单位	Lu, ZK (corresponding author), Guangxi Univ Nationalities, Coll Informat Sci & Engn, Nanning 530006, Guangxi, Peoples R China.
推荐引用方式 GB/T 7714	Lu, Zhenkun,Yang, Cui,Qin, Donghong,et al. Estimating the parameters of ultrasonic echo signal in the Gabor transform domain and its resolution analysis[J],2016,120.
APA	Lu, Zhenkun,Yang, Cui,Qin, Donghong,&Luo, Yuling.(2016).Estimating the parameters of ultrasonic echo signal in the Gabor transform domain and its resolution analysis.SIGNAL PROCESSING,120.
MLA	Lu, Zhenkun,et al."Estimating the parameters of ultrasonic echo signal in the Gabor transform domain and its resolution analysis".SIGNAL PROCESSING 120(2016).