Doctoral Dissertations

Abstract

"Detection of super-regenerative receivers using their unintended electromagnetic emissions at a significant distance is challenging due to high levels of ambient noise. The evolution of an approach used to solve this problem is chronicled within the three papers that combine to form this dissertation. First, a passive detection method was created for detecting devices based on the characterization of their unintended emissions and utilized a cascading correlation method to confirm detection. Using a simple sine-wave stimulation to modify these unintended emissions produced better results over passive detection techniques by improving the signal quality and the consistency of the unintended emissions, but was still rather limited in extending the reliable detection distance. Additionally, extensive characterization measurements of the target device were required. If the response of the receiver to a stimulation is known, however, a more complex stimulation can be used to embed additional information into the unintended emissions which does not require the previously essential characterization data. For regenerative receivers, an amplitude modulated stimulation generates a corresponding modulation in the unintended emissions of the target device. The receiver may thus be detected from these modulated emissions by calculating the received signal energy and then correlating it with the amplitude of the stimulation. A high correlation indicates the presence of the device. The receiver may be detected even when its emissions are well below the noise floor. Results show that five super-regenerative receivers from three different manufacturers can be detected in a noisy environment to distances of over 100 meters with an area under the receiver operating characteristic (ROC) curve of 94%"--Abstract, page iv.

Advisor(s)

Beetner, Daryl G.

Committee Member(s)

DuBroff, Richard E.
OKeefe, Matt
Grant, Steven L.
Hubing, Todd H.

Department(s)

Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering

Sponsor(s)

United States. Department of Homeland Security

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2009

Journal article titles appearing in thesis/dissertation

  • Detection and identification of low-cost RF receivers based on their unintended electromagnetic emissions
  • Controlling unintended emissions from regenerative receivers to improve detection and identification
  • Detection of regenerative receivers based on the modulation of their unintended electromagnetic emissions

Pagination

x, 55 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2009 Sarah Ann Seguin, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Electromagnetic interference
Electromagnetic theory
Electromagnetic waves
Signal detection

Thesis Number

T 9561

Print OCLC #

746051562

Electronic OCLC #

468800060

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