Transponder, interrogator, and communication system

Details Transponder, interrogator, and communication system Transponder, interrogator, and communication system

2006-09-19

2006-09-19

Garber, Wendy R. (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010200, C375S219000, C375S357000

Reexamination Certificate

active

07109844

ABSTRACT:
A communication system1includes interrogators10, 11and transponders20, 21, 22. The interrogator10transmits a carrier wave, FC1,to the transponders20, 21, 22,and the transponders20, 21, 22return respective reflected waves, f1,f2,and f3,to the interrogator10.The transponders20, 21, 22modulate the received carrier waves FC1using respective subcarrier waves that have been modulated using respective information signals, and return the thus modulated carrier waves as the reflected waves f1,f2,and f3to the interrogator10.The transponders20, 21, 22hop the frequencies of the subcarrier waves according to respective different hopping patterns, such that an initial hopping frequency with which each of the frequency hopping patterns begins represents right-hand two bit values of a four-bit identification code of a corresponding one of the transponders20, 21, 22,and respective hopping frequencies of the each frequency hopping pattern represent respective bit values of four-bit transmission data transmitted from the corresponding transponder20, 21, 22to the interrogator10.

REFERENCES:
patent: 4206462 (1980-06-01), Rabow et al.
patent: 4804961 (1989-02-01), Hane
patent: 5426667 (1995-06-01), van Zon
patent: 6014406 (2000-01-01), Shida et al.
patent: 6177861 (2001-01-01), MacLellan et al.
patent: 6265963 (2001-07-01), Wood, Jr.
patent: 6356230 (2002-03-01), Greef et al.
patent: 6650695 (2003-11-01), Girard
patent: 6658044 (2003-12-01), Cho et al.
patent: A 7-23467 (1995-01-01), None
patent: A 2000-49656 (2000-02-01), None
patent: A 2000-174667 (2000-06-01), None
patent: A 2001-102964 (2001-04-01), None

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