START-STOP MESSAGE RECEIVING DEVICE Russian patent published in 2004 - IPC

FIELD: wire, radio, radio-relay, and meteor-scatter communication lines.

SUBSTANCE: proposed device has series-connected receiver, first band filter, first amplitude detector, subtraction unit, chopper, matched filter, solver, first pulse shaper, pseudorandom sequence generator, and inverter with relevant connections; series-connected second band filter and second amplitude detector with relevant connections; series-connected first delay line, first switch, first demodulator of phase-difference modulated signals, OR circuit, shift register, and third switch; series-connected second delay line, second switch, and second demodulator of phase-difference modulated signals with relevant connections; series-connected adder, third amplitude detector, integrator, threshold device, and second pulse shaper, as well as binary counter with relevant connections.

EFFECT: reduced probability of false alarm.

1 cl, 2 dwg