Railway communication system

Details Railway communication system Railway communication system

1977-08-19

1980-06-24

Safourak, Benedict V.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 17, 340 47, H04B 720

Patent

active

042097495

ABSTRACT:
In one illustrated embodiment involving a railway communication system, about ten send-receive stations form a transmission section operating at one pair of frequencies in the range above one gigahertz, the stations being arranged at about one kilometer intervals along the route for radio communication with mobile stations moving therealong. A next succeeding similar transmission section operates at a different pair of send and receive frequencies above one gigahertz. All of the stations of a given transmission section may be in communication with a main station by means of a parallel cable connection. A central station then may communicate with mobile stations via the respective main stations. In another embodiment, the stations are implemented as microwave relay stations linked to a main station by the same antenna system used for communication with the mobile stations. In either case, the mobile stations are suitably switched from one pair of send-receive frequencies to another as the vehicles of the system move from one transmission section to another along the route.

REFERENCES:
patent: 2896072 (1959-07-01), Bachelet et al.
patent: 2904674 (1959-09-01), Crawford
patent: 3517315 (1970-06-01), Malm
patent: 3539524 (1970-10-01), Daskalakis et al.
patent: 3555424 (1971-01-01), Malm
Sicarid-TCL A New Microwave System for the Transfer of Informations from the Track to the Wagon in Railway Networks, Becker & Mermolia, Sep. 1975.

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