Trainline communication link using radio frequency signal

Details Trainline communication link using radio frequency signal Trainline communication link using radio frequency signal

1993-03-29

1994-10-04

Huppert, Michael S.

Railway switches and signals

Cab signal or train control

Magnetic rail

246187C, 213 13, 34087011, B61L 2300, G08C 1900

Patent

active

053519191

ABSTRACT:
The link permits communications between cars of a railway or subway trains. On at least a first one of the cars, a multiplexer multiplexes digital signals representative of the status of various systems on the car, and processes them into a first digital trainline signal. A transmitter includes a modulator which converts the digital trainline signal to a RF signal, and the RF signal is transmitted, by an antenna, through free space from the first car to a second car. The second car includes an antenna for receiving the RF signal, and a receiver for de-modulating the signal and converting it to a second digital trainline signal. A demultiplexer demultiplexes the second digital trainline signal into appropriate formats readable by the train systems on board the second car. Both the first and second cars include multiplexers and demultiplexers, and transmitters and receivers, so that communication is possible between the first car and the second car as well as between the second car and the first car.

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patent: 5121410 (1992-06-01), Desmarais

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