Vehicle communication system using existing roadway loops

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

1989-12-28

1992-02-18

Crosland, Donnie L.

Communications: electrical

External condition vehicle-mounted indicator or alarm

Highway information

340941, 455 41, 455 55, 455 99, G08G 109

Patent

active

050898159

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.

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van Tol et al., "VECOM Short-Range Communication with Vehicles", 9/83, pp. 235-249, Philips Telecommunication Review, vol. 41, No. 3.
Unknown, "Aid for Drivers", 6/75, pp. 269-270, Wireless World, vol. 81, No. 1474, Hayward's Heath, Sussex, Great Britain.

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