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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chahine, K. Baltazart, V. Derobert, X. Wang, Y. |
| Copyright Year | 2009 |
| Description | Author affiliation: Ecole polytechnique de l'université de Nantes, France (Wang, Y.) || Laboratoire Central des Ponts et Chaussées, Route de Bouaye, BP 4129, 44341 Bouguenais, Cedex, France (Chahine, K.; Baltazart, V.; Derobert, X.) |
| Abstract | Blind deconvolution of sparse spikes is a well-known problem in the fields of seismic exploration and ultrasonic nondestructive testing. In measuring thin layer thickness of asphalt pavements using GPR, a similar problem arises; the sparse reflectivity series representing the layered structure of the pavement convolved with the radar wavelet results in masking closely spaced reflections. A successful deconvolution retrieves the reflectivity series and thus improves the time resolution and facilitates quantitative data interpretation. In this paper, we cast the convolutional model as a multidimensional data model which renders blind deconvolution via independent component analysis (ICA) possible. We use a nonlinearity related to the double exponential density whose heavy-tailed nature provides further insight into the sparse nature of the reflectivity series. The method is tested on synthetic and real GPR data from a thin PVC slab. The results attest to the accuracy of the time delay estimates and verify the high resolution of the proposed approach. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 435738 |
| Page Count | 5 |
| File Format | |
| ISBN | 9782912328557 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-10-12 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | SEE |
| Subject Keyword | Deconvolution Independent component analysis Ground penetrating radar Reflectivity Nondestructive testing Seismic measurements Thickness measurement Ultrasonic variables measurement Asphalt Radar measurements time resolution nondestructive testing reflectivity series sparsity time delay estimation |
| Content Type | Text |
| Resource Type | Article |
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