Share Email Print
cover

Proceedings Paper

Characterization of RF front-ends by long-tail pulse response
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The recognition of unauthorized communications devices at the entry-point of a secure location is one way to guard against the compromise of sensitive information by wireless transmission. Such recognition may be achieved by backscatter x-ray and millimeter-wave imaging; however, implementation of these systems is expensive, and the ability to image the contours of the human body has raised privacy concerns. In this paper, we present a cheaper and less-invasive radio-frequency (RF) alternative for recognizing wireless communications devices. Characterization of the device-under-test (DUT) is accomplished using a stepped-frequency radar waveform. Single-frequency pulses excite resonance in the device's RF front-end. Microsecond periods of zero-signal are placed between each frequency transition to listen for the resonance. The stepped-frequency transmission is swept through known communications bands. Reception of a long-tail decay response between active pulses indicates the presence of a narrowband filter and implies the presence of a front-end circuit. The frequency of the received resonance identifies its communications band. In this work, cellular-band and handheld-radio filters are characterized.

Paper Details

Date Published: 27 April 2010
PDF: 8 pages
Proc. SPIE 7669, Radar Sensor Technology XIV, 76690X (27 April 2010); doi: 10.1117/12.862696
Show Author Affiliations
Gregory J. Mazzaro, U.S. Army Research Lab. (United States)
Kenneth I. Ranney, U.S. Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 7669:
Radar Sensor Technology XIV
Kenneth I. Ranney; Armin W. Doerry, Editor(s)

© SPIE. Terms of Use
Back to Top