DETECTION SYSTEM AND METHOD FOR RAILWAY TRACK CIRCUITS USING BPSK MODULATED CODING

摘要

The present invention is present in the track section unit (3) on the railway vehicle (2) of the track (1) or a system for detecting the absence , and with a digital message to be transmitted carrying the track section unit 3, a track section unit transmitter generating a BPSK signal that carries a unique code dependent on the track section unit (3) (5) and to receive and demodulate the BPSK signal , the correlation of the demodulated BPSK signal with the unique code is a predetermined threshold value or more , found that the correlation represents a pre-determined minimum proportion of the total energy of the demodulated BPSK signal to the track section unit (3 ) relates to a system comprising at least one track section unit receiver (7) of said BPSK signal , which indicates that this clear . ; the invention also relates to a method for monitoring such a system .