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Proceedings Paper

Enhancing nuclear quadrupole resonance (NQR) signature detection leveraging interference suppression algorithms
Author(s): James A. DeBardelaben; Jeremy K. Miller; Wilbur L. Myrick; Joel B. Miller; G. Charmaine Gilbreath; Blerta Bajramaj
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Paper Abstract

Nuclear quadrupole resonance (NQR) is a radio frequency (RF) magnetic spectroscopic technique that has been shown to detect and identify a wide range of explosive materials containing quadrupolar nuclei. The NQR response signal provides a unique signature of the material of interest. The signal is, however, very weak and can be masked by non-stationary RF interference (RFI) and thermal noise, limiting detection distance. In this paper, we investigate the bounds on the NQR detection range for ammonium nitrate. We leverage a low-cost RFI data acquisition system composed of inexpensive B-field sensing and commercial-off-the-shelf (COTS) software-defined radios (SDR). Using collected data as RFI reference signals, we apply adaptive filtering algorithms to mitigate RFI and enable NQR detection techniques to approach theoretical range bounds in tactical environments.

Paper Details

Date Published: 7 June 2012
PDF: 12 pages
Proc. SPIE 8382, Active and Passive Signatures III, 838206 (7 June 2012); doi: 10.1117/12.920942
Show Author Affiliations
James A. DeBardelaben, IvySys Technologies, LLC (United States)
Jeremy K. Miller, IvySys Technologies, LLC (United States)
Wilbur L. Myrick, IvySys Technologies, LLC (United States)
Joel B. Miller, U.S. Naval Research Lab. (United States)
G. Charmaine Gilbreath, U.S. Naval Research Lab. (United States)
Blerta Bajramaj, U.S. Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 8382:
Active and Passive Signatures III
G. Charmaine Gilbreath; Chadwick Todd Hawley, Editor(s)

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