FIELD: radio engineering and communications.
SUBSTANCE: invention relates to the field of radio communication, namely, to systems for protecting narrowband data channels in the HF band under conditions of multipath propagation of radio signals. Technical result is achieved due to the algorithms providing transformation and generation of spreading signals on the transmitting side of the data transmission channel in the form of the orthogonal derivative of the Walsh and Barker signal system, and on the receiving side of the channel, an inverse time conversion of signal durations and code division of the beam signals in form.
EFFECT: protection of narrow-band channels in the transmission of data in the HF range from multipath signals, as well as improving the technical characteristics of data transmission channels in terms of throughput, noise immunity and energy performance.
1 cl, 12 dwg
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