Railway track circuits

Details Railway track circuits Railway track circuits

2006-03-28

2006-03-28

Basinger, Sherman (Department: 3617)

Railway switches and signals

Block-signal systems

Automatic

Reexamination Certificate

active

07017864

ABSTRACT:
Railway track circuit apparatus for train detection comprises a track circuit transmitter and a receiver, wherein the transmitter generates a QPSK modulated signal that is transmitted into a track circuit and which is detected by the receiver.

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