FIELD: radio engineering.
SUBSTANCE: when the main transmitter transmits blocks of unipolar pulses of the main pseudorandom sequence with duration ≥3τ0, additional information is transmitted, which is emitted with additional transmitter the carrying frequency of which is chosen from ratio 
and minimum emission pulse duration of additional transmitter is chosen equal to 3τ0. At that, emission of additional transmitter is performed synchronously and coherently with emission of the above blocks of unipolar pulses of the main pseudorandom sequence, and the reception of this information is performed on receiving side with additional receiver.
EFFECT: improving use efficiency of allocated frequency band for information transmission channel.
2 dwg
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