NDLI: Continuous basis compressive time-delay estimation in overlapped echoes

Content Provider	IET Digital Library
Author	Fereidoony, Foad Chamaani, Somayyeh Mirtaheri, Syed Abdullah Sebt, Mohammad Ali
Abstract	High-accuracy time-delay estimation is basically noted in several research areas. L1-minimisation is a compressive sensing (CS) approach which solves this problem with high resolution and accuracy in the case of spars signals. Band excluded orthogonal matching pursuit is another CS method which uses a greedy algorithm to retrieve time delays and has lower complexity compared with the L1-minimisation method; however, it is only applicable when the signals are well spaced or orthogonal. Moreover, both approaches are established on a discrete basis which inherently limits their accuracy for the constraint on the sampling rate of the system. To mitigate these challenges in this study, the authors first incorporate the L1-minimisation method in a greedy algorithm to achieve a high resolution in the discrete grid. In the next step, to overcome the limitation caused by the sampling rate and refine the obtained time delays, the algorithm is combined with a complex continuous basis pursuit (CCBP) by using a polar interpolation. Their simulation and experiment results show that the proposed combination of L1-minimisation-CCBP can recover time delays in very closely spaced echoes not only with high accuracy but also with low computational time and sampling rate.
Starting Page	566
Ending Page	571
Page Count	6
ISSN	17519675
Volume Number	11
e-ISSN	17519683
Issue Number	Issue 5, Jul (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/11/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2016.0496
Journal	IET Signal Processing
Publisher Date	2017-02-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Complex Continuous Basis Pursuit Compressed Sensing Compressive Sensing Approach Continuous Basis Compressive Time-delay Estimation CS Method Delay Estimation Discrete Grid Echo Greedy Algorithm High-accuracy Time-delay Estimation Interpolation Interpolation And Function Approximation Iterative Method L1-minimisation-CCBP Minimisation Numerical Analysis Optimisation Technique Orthogonal Matching Pursuit Algorithm Overlapped Echo Polar Interpolation Signal Processing And Detection Signal Processing Theory Signal Resolution Signal Sampling Sparse Signal Statistics System Sampling Rate Time Delay Recovery
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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