METHOD AND APPARATUS FOR INTERROGATING AND IDENTIFYING FIXED OR MOVING TARGETS
Hijacked vehicles, or the like, are identified by illuminating a transponder mounted to the vehicle by a beam of microwave energy, e.g., from a helicopter flying over the traffic. The transponder includes non-linear diodes which reradiate a signal back towards the helicopter. Means are disclosed for modulating the return signal with a 16-bit identification code, each bit of which is transmitted as a 31-bit pseudo-random code.
- Supersedes PAT-APPL-579 658-75. Availability: This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, D. C. 20231 $0.50.
Department of the ArmyPentagon Building
Washington, DC United States 20310
- Siverhus, A V
- Matava, J A
- Klose, D R
- Publication Date: 1975-5-21
- Pagination: 8 p.
- TRT Terms: Ground vehicles; Helicopters; Hijacking; Law enforcement; Lighting; Microwaves; Moving target indicators; Patents; Radar; Radio transmitters; Theft; Tracking systems; Transponders; Trucks
- Uncontrolled Terms: Airborne
- Old TRIS Terms: Moving targets; Targets
- Subject Areas: Aviation; Motor Carriers; Security and Emergencies; Vehicles and Equipment;
- Accession Number: 00166613
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: PAT-APPL-579-658 Patent, PATENT-4 015 259
- Files: TRIS
- Created Date: Oct 29 1978 12:00AM