FIELD: wireless communications.
SUBSTANCE: invention relates to radio communication and can be used to transmit discrete messages over short-wave communication channels in conditions of action of deliberate additive interference. Short-wave radio communication system employs frequency-shift keyed signals transmitted by frequency-time coding, providing protection from selective fading, unintentional and deliberate noise concentrated on the spectrum. Frequencies of frequency-time matrices of all subchannels are uniformly spaced apart by a quasi-random law within the entire pass band of the communication channel, and signal is transmitted in pseudo-random frequency tuning mode. Values of symbols which correspond to separate pulses transmitted by frequency-time coding are determined by leading edges of said pulses, which provides protection against intentional targeted interference, which at quasi-random frequencies always appear after transmitted information pulses and in this case can not affect correct reception of transmitted message.
EFFECT: technical result consists in improvement of reliability of transmitting messages over radio communication channels in conditions of creation of intentional additive interference by the opponent.
1 cl, 4 dwg
