Vehicle communication system using existing roadway loops

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

G - Physics

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G08G 1/09 (2006.01) G08G 1/01 (2006.01) G08G 1/042 (2006.01) G08G 1/0967 (2006.01)

Patent

CA 1310369

27 VEHICLE COMMUNICATION SYSTEM USING EXISTING ROADWAY LOOPS ABSTRACT OF THE DISCLOSURE A method and system for transferring informa- tion between a moving vehicle and a stationary informa- tion 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 gen- erated 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 car- rier pattern processing. D8/8239-11

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