FIELD: communications engineering; multichannel communication systems.
SUBSTANCE: instruction is generated in each channel in the form of sequence of pulse-width modulated information pulses; oscillations of one pair of frequencies are frequency-keyed in each channel; pulse-width and frequency modulated information pulse whose length is shorter than maximal length is added to pulse-width and frequency modulated pulse at (N + 1) frequency to attain maximal value; instruction polarity is determined in each channel by oscillation frequency in information pulse and instruction value, by length of pulse-width and frequency modulated pulse at same frequency.
EFFECT: enhanced modulation percentage and noise immunity.
4 cl, 2 dwg
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