A.R. Bestugin1, V.A. Dolgikh2, S.V. Dvornikov3, I.A. Kirshina4, S.S. Dvornikov5

1,3–5 Saint-Petersburg State University of Aerospace Instrumentation (St. Petersburg, Russia)

2 JSC «NTI «RADIOSVYAZ» (St. Petersburg, Russia)

3,5 Marshal of the Soviet Union S.M. Budyonny Military Academy of Communications (St. Petersburg, Russia)

1 fresguap@mail.ru, 2 ntiradio@ntiradio.ru, 3 practicdsv@yandex.ru, 4 ikirshina@mail.ru, 5 dvornic92@mail.ru

In accordance with the Russian Maritime Register, each vessel within the maritime area A1-A3 is required to have a radio installation operating in the intermediate wave and short wave bands. Therefore, further development and improvement of technologies for reception and processing of signals in the intermediate and short wave bands is an urgent direction for maritime mobile radio communication systems.

Taking into account the mentioned circumstances, it is required to synthesize the amplitude manipulation signals and develop a structural scheme of the modulator for their formation.

The analysis of classes of radiations used in marine mobile radio communications of intermediate and short waves is presented. Spectral characteristics of the signals used in them are considered. The commonality of single-band and amplitude modulation transmissions is shown. Potential noise immunity of amplitude modulation signals from the point of view of their quadrature synthesis is estimated. It is proved that under certain conditions its value corresponds to the noise immunity of single-band modulation signals. The prospect of application of transmissions on the basis of amplitude modulation under the condition of redistribution of energy of the formed pilot-signal between information components of their spectrum is determined. The analytical equation of quadrature synthesis of amplitude modulation signals and the structural scheme realizing its modulator are given. Proposals for modifying the analytical synthesis equation of the signal, which allows redistributing the carrier oscillation energy between the side components of the spectrum, are presented.

The experimental results confirming the validity of the conclusions about the increase of the energy potential of amplitude modulation signals in the case of the possibility of redistributing the energy of their carrier oscillation are demonstrated. An original technical solution of modulator construction is presented, which allows to form both single-band and amplitude modulation signals on the basis of quadrature synthesis technology.

Bestugin A.R., Dolgikh V.A., Dvornikov S.V., Kirshina I.A., Dvornikov S.S. Quadrature synthesis of amplitude manipulation signals with controllable pilot signal level. Achievements of modern radioelectronics. 2025. V. 79. № 8. P. 30–40. DOI: https://doi.org/10.18127/j20700784-202508-03 [in Russian]

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