FIELD: communication.
SUBSTANCE: invention relates to electrical communication. Device comprises signal/noise ratio meter, prohibition unit, amplitude detector, first threshold unit, jamming signal generator, additional switch, limiter, frequency detector, second threshold unit, switch and calling party signal recording unit, operating amplifier, band-pass filter, modem, consisting of modulator and demodulator, computer, rejector filter, phase changer, delay line, adder, subtractor, condenser, integrator, inverter, “AND” element, variable-frequency generator.
EFFECT: technical result is higher quality of data transfer channel by increasing reliability of data channel digital signals recovery using sequencing multilevel amplitude modulation (QAM) in channel under data channel exposure to additive and multiplicative interferences.
1 cl, 1 dwg
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