Vehicle identification system having error detection means

Details Vehicle identification system having error detection means Vehicle identification system having error detection means

1975-09-23

1978-01-10

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

246 34R, 3401461D, 340408, 343 65SS, G08G 100

Patent

active

040682110

ABSTRACT:
Vehicle identification system comprising a carrier period detector in which, to increase the accuracy of identification signals received, the identification signal is rejected and a new identification signal is requested whenever one period is absent from the carrier signal received.

REFERENCES:
patent: 3388393 (1968-06-01), Graham et al.
patent: 3394349 (1968-07-01), Day
patent: 3456239 (1969-07-01), Glasson
patent: 3510870 (1970-05-01), Woollvin
patent: 3576947 (1971-05-01), Kruger
patent: 3790699 (1974-02-01), Da Silva
patent: 3952285 (1976-04-01), Falck

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