A coded radar reflector for remote identification of personnel and vehicles
F.R. Williamson
L.F. Moore
R. Brooks
J.A. Williamson
M.C. McGee
Georgia Tech. Res. Inst., Georgia Inst. of Technol., Atlanta, GA, USA;
This paper appears in: Radar Conference, 1993., Record of the 1993 IEEE National
Publication Date: 1993
On page(s): 186-191
Meeting Date: 04/20/1993 - 04/22/1993
Location: Lynnfield, MA, USA, USA
ISBN: 0-7803-0934-0
References Cited: 0
INSPEC Accession Number: 4595899
Digital Object Identifier: 10.1109/NRC.1993.270468
Current Version Published: 2002-08-06
Abstract
A nonradiating radar reflector transponder (radar reflector) that can be modulated with a unique digital code is described. This code can be detected in the output of a radar sensor and used to remotely identify the bearer of the transponder. When used in a security surveillance system, badge-carrying personnel moving through halls and passageways can be identified as they pass radar monitoring stations. Vehicles fitted with a modulated radar reflector mounted behind the windshield or as part of the license plate can also be detected by suitable sensors. The key to this surveillance concept is the reflector modulator circuit that incorporates a small, low-powered digital circuit to modulate a radar reflector with digitally encoded information. This modulation pattern can be detected by a radar sensor to uniquely identify each unit. Generic system designs for these two application scenarios are described together with coded reflector designs, coding schemes, and signal processing algorithms. Example data from concept feasibility demonstrations are presented.
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