Backscattering transponder switchable between a modulator/demodu

Details Backscattering transponder switchable between a modulator/demodu Backscattering transponder switchable between a modulator/demodu

1994-05-20

1997-06-17

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

375315, 455107, H04B 144

Patent

active

056406878

ABSTRACT:
An electronic toll system for monitoring a plurality of lanes including a plurality of lane monitoring devices operative to monitor passage of vehicles through the corresponding plurality of lanes, and a lane monitoring device coordinating system for coordinating operation of the lane monitoring devices such that not all of the lane monitoring devices operate simultaneously.

REFERENCES:
patent: 4075632 (1978-02-01), Baldwin et al.
patent: 4897642 (1990-01-01), DiLullo et al.
patent: 5293399 (1994-03-01), Hefti
patent: 5307349 (1994-04-01), Shloss et al.
patent: 5313211 (1994-05-01), Tokuda et al.
Rittich, D., et al., "Future Automatic Toll Registration for the Road Traffic", Sondderdruck aus ntz Bd. 46 (1993), Heft 4.
Ernst, S.J., "Amplitude Shift Keying (Ask) or On/Off (OOK)", Receiving Systems Design, Artech, 1984.

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