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Frequency-Selective Detection of Nuclear Quadrupole Resonance Signals
Karlstad University, Division for Engineering Sciences, Physics and Mathematics.
Karlstad University, Division for Engineering Sciences, Physics and Mathematics.
2005 (English)In: IEEE Transactions on Geoscience and Remote Sensing, ISSN 0196-2892, E-ISSN 1558-0644, Vol. 43, no 11, 2659-2665 p.Article in journal (Refereed) Published
Abstract [en]

Nuclear quadrupole resonance (NQR) offers an unequivocal method of detecting and identifying both hidden explosives, such as land mines, and a variety of narcotics. Unfortunately, the practical use of NQR is restricted by a low signal-to-noise ratio (SNR), and means to improve the SNR are vital to enable a rapid, reliable, and convenient system. In this paper, we introduce a frequency-selective approximate maximum-likelihood (FSAML) detector, operating on a subset of the available frequencies, making it robust to the typically present narrow-band interference. The method exploits the inherent temperature dependency of the NQR frequencies as a way to enhance the SNR. Numerical evaluations, using both simulated and real NQR data, indicate a significant gain in probability of accurate detection as compared to a current state-of-the-art approach.

Place, publisher, year, edition, pages
2005. Vol. 43, no 11, 2659-2665 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kau:diva-19469DOI: 10.1109/TGRS.2005.856633OAI: oai:DiVA.org:kau-19469DiVA: diva2:593117
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2013-11-11Bibliographically approved

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Jakobsson, AndreasMossberg, Magnus
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