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Improved modeling and bounds for NQR spectroscopy signals

Kyriakidou, Georgia; Jakobsson, Andreas LU ; Gudmundson, Erik LU ; Gregorovic, Alan; Barras, Jamie and Althoefer, Kaspar (2014) 22nd European Signal Processing Conference - EUSIPCO 2014 In European Signal Processing Conference
Abstract
Nuclear Quadrupole Resonance (NQR) is a method of de-

tection and unique characterization of compounds containing

quadrupolar nuclei, commonly found in many forms of ex-

plosives, narcotics, and medicines. Typically, multi-pulse

sequences are used to acquire the NQR signal, allowing the

resulting signal to be well modeled as a sum of exponentially

damped sinusoidal echoes. In this paper, we improve upon

the earlier used NQR signal model, introducing an observed

amplitude modulation of the spectral lines as a function of

the sample temperature. This dependency noticeably af-

fects the achievable identification performance in the typical

case... (More)
Nuclear Quadrupole Resonance (NQR) is a method of de-

tection and unique characterization of compounds containing

quadrupolar nuclei, commonly found in many forms of ex-

plosives, narcotics, and medicines. Typically, multi-pulse

sequences are used to acquire the NQR signal, allowing the

resulting signal to be well modeled as a sum of exponentially

damped sinusoidal echoes. In this paper, we improve upon

the earlier used NQR signal model, introducing an observed

amplitude modulation of the spectral lines as a function of

the sample temperature. This dependency noticeably af-

fects the achievable identification performance in the typical

case when the substance temperature is not perfectly known.

We further extend the recently presented Cramér-Rao lower

bound to the more detailed model, allowing one to determine

suitable experimental conditions to optimize the detection and

identifiability of the resulting signal. The theoretical results

are carefully motivated using extensive NQR measurements. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Nuclear Quadrupole Resonance, temper- ature dependence, off-resonance effects, Cramér-Rao lower bound
in
European Signal Processing Conference
pages
5 pages
publisher
EURASIP
conference name
22nd European Signal Processing Conference - EUSIPCO 2014
external identifiers
  • scopus:84911891848
ISSN
2219-5491
language
English
LU publication?
yes
id
269a0a01-a3e0-4603-a123-0cffe9231ff7 (old id 4645576)
alternative location
http://www.eurasip.org/Proceedings/Eusipco/Eusipco2014/HTML/papers/1569924619.pdf
date added to LUP
2014-10-22 18:02:14
date last changed
2017-07-30 03:58:23
@inproceedings{269a0a01-a3e0-4603-a123-0cffe9231ff7,
  abstract     = {Nuclear Quadrupole Resonance (NQR) is a method of de-<br/><br>
tection and unique characterization of compounds containing<br/><br>
quadrupolar nuclei, commonly found in many forms of ex-<br/><br>
plosives, narcotics, and medicines. Typically, multi-pulse<br/><br>
sequences are used to acquire the NQR signal, allowing the<br/><br>
resulting signal to be well modeled as a sum of exponentially<br/><br>
damped sinusoidal echoes. In this paper, we improve upon<br/><br>
the earlier used NQR signal model, introducing an observed<br/><br>
amplitude modulation of the spectral lines as a function of<br/><br>
the sample temperature. This dependency noticeably af-<br/><br>
fects the achievable identification performance in the typical<br/><br>
case when the substance temperature is not perfectly known.<br/><br>
We further extend the recently presented Cramér-Rao lower<br/><br>
bound to the more detailed model, allowing one to determine<br/><br>
suitable experimental conditions to optimize the detection and<br/><br>
identifiability of the resulting signal. The theoretical results<br/><br>
are carefully motivated using extensive NQR measurements.},
  author       = {Kyriakidou, Georgia and Jakobsson, Andreas and Gudmundson, Erik and Gregorovic, Alan and Barras, Jamie and Althoefer, Kaspar},
  booktitle    = {European Signal Processing Conference},
  issn         = {2219-5491},
  keyword      = {Nuclear Quadrupole Resonance,temper- ature dependence,off-resonance effects,Cramér-Rao lower bound},
  language     = {eng},
  pages        = {5},
  publisher    = {EURASIP},
  title        = {Improved modeling and bounds for NQR spectroscopy signals},
  year         = {2014},
}