Е.А. Altman, А.G. Malutin, Yu.V. Romanov, V.V. Fomin, S.N. Chizhma

The approach to the implementation of secure data transfer in the HF range is reviewed in this article. To form a signal, multiplexing with orthogonal frequency division of sub channels based on fast Fourier transformation and binary phase shift keying in each sub channel are used. Expanding the range of the signal is carried out using a pseudorandom number generator "Mersenne twister". Reception algorithm resistant to time and frequency shifts of the signal receiving ability is proposed. Assessing the level of signal hiding carried by BDS-statistic analysis demonstrated comparable to reference noise secrecy. Performed computer simulation modeling of the system in a channel with constant parameters and additive white Gaussian noise showed comparable with the correlation reception of binary phase shift keying immunity. The simulation results of the system operation in a channel with scattering in frequency and time suggest the need to optimize the baud rate of the reception algorithm, as increased immunity actually stops when the signal duration is about 1 second.