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Robust Multichannel Detection of Mixtures Using Nuclear Quadrupole Resonance'

Butt, Naveed LU ; Jakobsson, Andreas LU ; Somasundaram, Samuel D. and Smith, John A. S. (2008) In IEEE Transactions on Signal Processing 56(10). p.5042-5050
Abstract
Nuclear quadrupole resonance (NQR) is a radio-frequency (RF) spectroscopic technique, able to detect the presence of many high explosives and narcotics. In practice, the weak NQR signal is often corrupted by strong RF interference (RFI); therefore, various multichannel detection algorithms have recently been proposed for NQR. However, these algorithms allow for only a single compound/polymorph, whose associated amplitudes are assumed to be known to within a scaling. Regrettably, these amplitudes are typically prone to some level of uncertainty; and, in several cases of interest, signals from a mixture of NQR compounds/polymorphs may be present, leading to performance degradation in the aforementioned algorithms. In this paper, we develop a... (More)
Nuclear quadrupole resonance (NQR) is a radio-frequency (RF) spectroscopic technique, able to detect the presence of many high explosives and narcotics. In practice, the weak NQR signal is often corrupted by strong RF interference (RFI); therefore, various multichannel detection algorithms have recently been proposed for NQR. However, these algorithms allow for only a single compound/polymorph, whose associated amplitudes are assumed to be known to within a scaling. Regrettably, these amplitudes are typically prone to some level of uncertainty; and, in several cases of interest, signals from a mixture of NQR compounds/polymorphs may be present, leading to performance degradation in the aforementioned algorithms. In this paper, we develop a robust multisensor hybrid algorithm able to process NQR signals from mixtures while also allowing for errors in the assumed amplitudes. Numerical investigations indicate that the proposed algorithm provides significant performance gains as compared to existing algorithms in the case when there are multiple polymorphs present and/or when uncertainties in the amplitudes exist. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
detection, estimation, quadrupole resonance (QR), robust methods, NQR SIGNALS, WAVE-FORM, TNT, RDX
in
IEEE Transactions on Signal Processing
volume
56
issue
10
pages
5042 - 5050
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • WOS:000259407400005
  • Scopus:53249115652
ISSN
1053-587X
DOI
10.1109/TSP.2008.928704
language
English
LU publication?
yes
id
2ac4562f-517e-403d-9437-32f048d9cc4a (old id 1216219)
date added to LUP
2008-10-20 16:05:28
date last changed
2016-10-13 04:31:41
@misc{2ac4562f-517e-403d-9437-32f048d9cc4a,
  abstract     = {Nuclear quadrupole resonance (NQR) is a radio-frequency (RF) spectroscopic technique, able to detect the presence of many high explosives and narcotics. In practice, the weak NQR signal is often corrupted by strong RF interference (RFI); therefore, various multichannel detection algorithms have recently been proposed for NQR. However, these algorithms allow for only a single compound/polymorph, whose associated amplitudes are assumed to be known to within a scaling. Regrettably, these amplitudes are typically prone to some level of uncertainty; and, in several cases of interest, signals from a mixture of NQR compounds/polymorphs may be present, leading to performance degradation in the aforementioned algorithms. In this paper, we develop a robust multisensor hybrid algorithm able to process NQR signals from mixtures while also allowing for errors in the assumed amplitudes. Numerical investigations indicate that the proposed algorithm provides significant performance gains as compared to existing algorithms in the case when there are multiple polymorphs present and/or when uncertainties in the amplitudes exist.},
  author       = {Butt, Naveed and Jakobsson, Andreas and Somasundaram, Samuel D. and Smith, John A. S.},
  issn         = {1053-587X},
  keyword      = {detection,estimation,quadrupole resonance (QR),robust methods,NQR SIGNALS,WAVE-FORM,TNT,RDX},
  language     = {eng},
  number       = {10},
  pages        = {5042--5050},
  publisher    = {ARRAY(0x8633b48)},
  series       = {IEEE Transactions on Signal Processing},
  title        = {Robust Multichannel Detection of Mixtures Using Nuclear Quadrupole Resonance'},
  url          = {http://dx.doi.org/10.1109/TSP.2008.928704},
  volume       = {56},
  year         = {2008},
}