Change search
ReferencesLink to record
Permanent link

Direct link
Complete post-separation of overlapping ultrasonic signals by combining hard and soft modeling
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
2008 (English)In: Ultrasonics, ISSN 0041-624X, E-ISSN 1874-9968, Vol. 48, no 5, 427-443 p.Article in journal (Refereed) Published
Abstract [en]

In some ultrasonic measurement situations, an adequate signal separation is difficult to achieve. A typical situation is material characterization of thin media using pulse-echo or through-transmission techniques, when the time-of-flight in the media is shorter than the emitted signal's time support. Separated signals are necessary to obtain accurate estimates of material properties and transit times. In this paper a new method is proposed that enables complete post separation of measured coinciding signals. The method is based on a combination of hard physical and soft empirical models, which allows for a description of both known and unknown properties making a complete separation possible. The validity and limitations of the model and the separation results are thoroughly addressed. The proposed technique is verified using real measurements on thin dispersive samples and validated using residual analysis. The experimental results show a complete separation with uncorrelated and normally distributed residuals. The method enables characterization and/or flow analysis in difficult overlapping situations.

Place, publisher, year, edition, pages
2008. Vol. 48, no 5, 427-443 p.
Research subject
Signal Processing
URN: urn:nbn:se:ltu:diva-13454DOI: 10.1016/j.ultras.2008.03.003Local ID: cacef140-ebb5-11dc-9508-000ea68e967bOAI: diva2:986407
Validerad; 2008; 20080306 (jesper)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

Open Access in DiVA

fulltext(752 kB)1 downloads
File information
File name FULLTEXT01.pdfFile size 752 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Martinsson, JesperHägglund, FredrikCarlson, Johan E.
By organisation
Signals and Systems
In the same journal

Search outside of DiVA

GoogleGoogle Scholar
Total: 1 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 1 hits
ReferencesLink to record
Permanent link

Direct link