A.N. Glushkov1, K.R. Chastukhin2, S.M. Fedorov3, V.V. Kiryushkin4

1-3 MESC “Zhukovsky – Gagarin Air Force Academy” (Voronezh, Russia)

4 JSC RIE “PROTEK” (Voronezh, Russia)

1 a.glushkov75@yandex.ru; 2 k.chastukhin@mail.ru; 3 fedorov_sm@mail.ru; 4 kiryushkin.vlad@mail.ru

Problem statement. When solving the problem of receiving and processing radio signals from communication systems by determining the accepted code sequence, the problem of insufficient noise immunity arises, resulting in an incorrect decision about the accepted code sequence. Existing methods of encoding information entail a large number of computational operations necessary to encode and decode useful signals. In order to simplify the encoding and decoding procedures, it is proposed to use biorthogonal sequences as an alternative to known information encoding methods.

Purpose. Development of a model of a digital demodulator of biorthogonal signals with binary phase-shift keying, which makes it possible to increase the noise immunity of receiving signals from radio communication systems and complexes.

Results. A method for demodulating biorthogonal signals with binary phase-shift keying is shown, a block diagram of the device implementing it, and the principle of operation of the proposed device is described. Based on the shown method, a simulation model is implemented in the MATLAB/Simulink environment. Mathematical modeling has been carried out in order to study the noise immunity characteristics of the developed method. The results of comparing the obtained dependence of the probability of a bit error with other known methods of encoding information are presented, confirming the high noise immunity of the presented model.

Practical significance. The results obtained can be applied to increase the noise immunity of radio communication systems and complexes through the use of biorthogonal sequences in the implementation of encoding operations.

Glushkov A.N., Chastukhin K.R., Fedorov S.M., Kiryushkin V.V. Simulation model of a digital biorthogonal radiosignal demodulator with binary phase-shift manipulation. Radiotekhnika. 2025. V. 89. № 7. P. 111−117. DOI: https://doi.org/10.18127/j00338486-202507-20 (In Russian)

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