FIELD: radio communication.
SUBSTANCE: invention relates to radio communication and can be used to transmit information in the short-wave frequency range. Information stream presented in the form of permutation modulation symbols is repeatedly duplicated in the frequency domain when forming a broadband multifrequency group signal. Detection of permutation modulation symbols occurs after parallel summation of M amplitudes of subcarriers making up one permutation modulation symbol chord, with all corresponding amplitudes in each duplicated permutation modulation symbol in the frequency domain of the group wideband multifrequency signal. Signal is generated by multiple repetition of permutation modulation symbols with a small number n (for example, n=6, k=3) in the spectrum of the useful signal.
EFFECT: high noise-immunity of radio communication due to use of a broadband multifrequency signal with multiple duplication of permutation modulation symbols in the frequency domain of the spectrum of the useful signal using a small value of the total number of frequency positions of the permutation modulation alphabet.
1 cl, 3 dwg
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