METHOD OF PROCESSING AUTOMATIC CONTINUOUS LOCOMOTIVE SIGNALING (ACLS) AND DEVICE TO THIS EFFECT Russian patent published in 2008 - IPC B61L25/06 B61L3/00 B61L3/20 

FIELD: railway automatic control systems, teleautomatics.

SUBSTANCE: power spectra of the ACLS reference code signals are preliminary entered into the measuring device memory. The signal is subjected to analog-to-digital conversion. The signal autocorrelation function is computed. A discrete Fourier conversion is made followed by the determination of the power spectrum of the signal. The maximum values corresponding to the current values of carrier frequency in the power spectrum of the ACLS received signal. The carrier frequencies of the received and reference signals are compared. Given the distortion of received signal carrier frequency from the reference signal carrier frequency, a shift in frequency of the received signal power spectrum is effected till the carrier frequencies of both spectra are equal. The carrier frequencies the received and reference signals spectra are suppressed. The factors of correlation between the power spectra of the received and reference signals are calculated to define from the maximum correlation factor the received code signal from the rail circuit to output it onto display. The device incorporates the signal reception unit, and the connected in series the ADC converter, the first digital correlator, the device of selection of the maximum correlation factor, the comparator, the indication unit. The analog-to-digital converter input is connected to the signal reception unit. The memorising device is connected to the digital second correlator second inputs and to those of the memorising unit.

EFFECT: higher reliability of signal processing.

2 cl, 4 dwg