Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Unique identity
Patent
1994-01-10
1996-04-16
Eldred, J. Woodrow
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Unique identity
342 47, 342 50, G01S 1380
Patent
active
055087051
ABSTRACT:
An interrogator-transponder system in which multiple vehicle mounted transponders which may be closely spaced in distance and moving at similar velocities are interrogated by interrogation signals that are identical for all interrogations. Digital coded data blocks consisting of an address code and a message code are transmitted on the interrogation frequency and are interleaved with the interrogation signals. Transponders respond with a coherent identification code and a message data code signal that is displaced in frequency from the interrogation signal by an amount that is identical for each transponder. The transponders decode interrogator data blocks that are associated with an address that is identical to the transponder identification code. The response signal spacings in time are difference for each transponder but are always multiples of the pulse repetition interval of the interrogation signal. Means are provided in the interrogation device to determine the velocity of each transponder, its range with respect to the interrogator, its identity and the contents of the transponder messages. Means are also provided to determine the range and velocity of transponder and nontransponder-equipped vehicles using the vehicle skin reflection of the interrogation signal.
REFERENCES:
patent: 3914762 (1976-09-01), Bell
patent: 3964024 (1976-10-01), Hutton
patent: 4001822 (1977-01-01), Sterzer
patent: 4006477 (1977-02-01), Yost, Jr.
patent: 4144534 (1979-03-01), Prickett
patent: 4180815 (1979-12-01), Hill
patent: 4278977 (1981-07-01), Nossen
patent: 4339753 (1982-07-01), Mawhinney
patent: 4740792 (1988-04-01), Sagey
patent: 4818998 (1989-04-01), Apsell
patent: 5014061 (1991-05-01), Ghose
patent: 5124699 (1992-06-01), Tervoert
patent: 5264854 (1993-11-01), Spiess
patent: 5278563 (1994-01-01), Spiess
patent: 5280435 (1994-01-01), Weisshaupt et al.
patent: 5294931 (1994-03-01), Meier
patent: 5410315 (1995-04-01), Huber
Merrell J. Skolnik, Radar Handbook 2nd Ed. 1990.
LandOfFree
Vehicle identification classification and communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vehicle identification classification and communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle identification classification and communication system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-328340