INDEPENDENT SIGNAL SYSTEM AND LAUNCHER SYSTEM OF FIRE EXTINGUISHING Russian patent published in 2014 - IPC G08B17/00 

FIELD: fire safety.

SUBSTANCE: receiver comprises a receiving antenna 29, a high frequency amplifier 30, mixers 31 and 47, a sawtooth voltage generator 32, local oscillators 33 and 46, amplifiers 34 and 48 of the intermediate frequency, a detector (selector) of 35 phase-shift keyed signals, spectrum analysers 36 and 38, a phase doubler 37, a comparison unit 39, the threshold units 40 and 50, delay lines 41 and 44, keys 42 and 51, a phase detector 43, a registration unit 45, a correlator 49.

EFFECT: improvement of noise immunity and selectivity of the receiver by suppressing spurious signals received by the mirror and combination channels.

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