Vehicle communication system using existing roadway loops

Details Vehicle communication system using existing roadway loops Vehicle communication system using existing roadway loops

1986-04-21

1988-03-15

Griffin, Robert L.

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

455 55, 455 99, 340941, 340989, H04B 500

Patent

active

047318678

ABSTRACT:
A method and system for transferring information between a moving vehicle and a stationary information location having a vehicle detector system with a loop antenna by using the loop antenna as either the receiving antenna for signals transmitted from a moving vehicle or as the transmitting antenna for signals generated by a transmitter located at the vehicle detector site for transfer to a receiver mounted on a moving vehicle. The information is encoded on a carrier having a frequency outside the normal frequency range of the vehicle detector system, preferably by interrupted carrier pattern processing.

REFERENCES:
patent: 3530434 (1970-09-01), Stites et al.
patent: 4311876 (1982-01-01), Endo et al.
patent: 4471356 (1984-09-01), Gidl

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