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
- 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:
https://lup.lub.lu.se/record/4645576
- author
- Kyriakidou, Georgia
; Jakobsson, Andreas
LU
; Gudmundson, Erik
LU
; Gregorovic, Alan
; Barras, Jamie
and Althoefer, Kaspar
- organization
- publishing date
- 2014
- 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
- host publication
- European Signal Processing Conference
- pages
- 5 pages
- publisher
- EURASIP
- conference name
- 22nd European Signal Processing Conference - EUSIPCO 2014
- conference location
- Lissabon, Portugal
- conference dates
- 2014-09-01 - 2014-09-05
- 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
- 2016-04-01 13:05:54
- date last changed
- 2022-02-04 02:24:46
@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}},
keywords = {{Nuclear Quadrupole Resonance; temper- ature dependence; off-resonance effects; Cramér-Rao lower bound}},
language = {{eng}},
publisher = {{EURASIP}},
title = {{Improved modeling and bounds for NQR spectroscopy signals}},
url = {{http://www.eurasip.org/Proceedings/Eusipco/Eusipco2014/HTML/papers/1569924619.pdf}},
year = {{2014}},
}