GROUND AND ON-VEHICLE INFORMATION TRANSMITTER

摘要

PURPOSE:To perform transmit a large amount of information excellent in quality between ground and on-vehicles by laying parallel two-line loops extending over plural block sections and adopting spread spectrum communication. CONSTITUTION:A ground information transmitting part of a ground transmitter- receiver (a) diffuses information from the ground to on-vehicle and applies the same with a synchronous diffusion signal to a narrow parallel two-line loop L provided on the central part of rails R. The ground information receiving part inverse-diffuses the diffused information received through the loop L to extract the information from on-vehicle to the ground. On the other hand, on- vehicle receiving parts of on-vehicle transmitter-receiver b1, b2 inverse-diffuses the diffused information obtained from the loop through an on-vehicle antenna A by PN code generated according to a synchronous diffusion signal to extract the information from the ground to on-vehicle. The on-vehicle information transmitting part diffuses the information from on-vehicle to the ground using PN code synchronized with PN code inverse-diffused on the ground to be delivered to the loop through the on-vehicle antenna.