Train radio communication system

Details Train radio communication system Train radio communication system

1994-12-02

1996-08-20

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

4552772, 455134, 455133, 455 331, 455 66, H04B 106, H04B 700

Patent

active

055488358

ABSTRACT:
A train radio communication system includes a plurality of land communication equipments and a train communication equipment. The land communication equipments are arranged at predetermined intervals along a railroad on which a train travels and designed to output transmission signals having different frequencies. The train communication equipment is arranged in the train and designed to set a radio channel between the train communication equipment and one of the land communication equipments during travel of the train. The train communication equipment includes a plurality of antennas, an antenna switch, a receiver, and an antenna controller. The antennas respectively receive the transmission signals from the land communication equipments. The antenna switch selects one of the antennas. The receiver demodulates an output from the antenna selected by the antenna switch and outputs a reception signal. The antenna controller includes a current position detecting section for detecting a current traveling position of the train and controls the antenna switch in accordance with a current traveling position from the current position detecting section.

REFERENCES:
patent: 4151969 (1979-05-01), Wood
patent: 4317229 (1982-02-01), Craig et al.
patent: 4863123 (1989-09-01), Bernard et al.
S. Yonezawa, Dr. Eng., "Microwave Communication--System Design and New Equipment-", 1970, Maruzen Company, Ltd., total six pages (pp. 168-179).

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