FIELD: communications engineering, possible use in synchronous and asynchronous communication lines.
SUBSTANCE: the system for transmitting quaternary-encoded radio signals contains transmitting section, to which through distribution route the input of receiving part is connected, where transmitting part contains clock impulse generator, generator of D-codes, generator of pseudo-random numbers, frequencies synthesizer, modulator, generator of signals of double frequency manipulation and block for controlling frequency shift, and receiving part contains demodulator, clock impulse generator, frequency synthesizer, pseudo-random numbers generator, block for selecting additional series, two-channel matched filter, subtracter, adjustable signal selector, block for controlling frequency shift and solving block.
EFFECT: increased interference resistance and trustworthiness under effect of intentional imitating interference.
4 cl, 7 dwg
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