S.S. Dvornikov1

1 St. Petersburg State University of Aerospace Instrument Engineering (St. Petersburg, Russia)

1 The Military Academy of Communications n.а. Marshal of the Soviet Union S.M. Budyonny (St. Petersburg, Russia)

1 dvornik92@mail.com

Formulation of the problem. To organize communication in the range of decameter radio waves, single-sideband modulation signals are actively used, since they provide high noise immunity to reception. However, their spectral structure is such that the carrier vibration accounts for 2/3 of the signal energy. Therefore, in practice, various signal forms with partially suppressed carrier wave levels are used. With this approach, irrational distribution of energy occurs, so technical solutions are needed that allow the energy of the signal structure to be redistributed between the carrier oscillation and information components at the synthesis stage. Research methods. The work uses elements of general communication theory, methods of noise-resistant reception, digital signal processing, analytical modeling and systems engineering. Target. Using the mathematical apparatus of quadrature representation of signals, obtain an equation for the analytical synthesis of single-sideband modulation signals, which ensures the redistribution of energy between the carrier vibration and information components by controlling an additional parameter that regulates the level of the pilot signal. And based on the resulting equation, develop a block diagram of the modulator. Results. An analytical equation for the synthesis of modified single-sideband modulation signals is obtained, which realizes the possibility of energy redistribution by controlling the level of the carrier oscillation. A modulator for generating modified signals up to the level of the device block diagram has been developed. Fragments of time representations and spectra of various forms of single-sideband modulation signals are demonstrated. The results of a comparative assessment characterizing the energy gain from the implementation of the developed technical solution are presented. Practical significance. The results can be used to improve the noise immunity of reception on radio communication lines in the decameter radio wave range. In particular, when constructing software synthesis algorithms or technical implementation of single-sideband modulation signal modulators.

Dvornikov S.S. Interference immunity of reception of single standband modulation signals with controlled energy parameters. Radiotekhnika. 2024. V. 88. № 8. P. 80−90. DOI: https://doi.org/10.18127/j00338486-202408-08 (In Russian)

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