V.A. Lipatnikov – Dr.Sc. (Eng.), Professor, Senior Research Scientist, 

Centre for Scientific Research, 

Marshall of the Soviet Union S.M. Budenny Military Academy of Communication (St. Petersburg) E-mail: lipatnikovanl@mail.ru

P.I. Kuzin – Lecturer, 

Department of General Professional Disciplines,

Marshall of the Soviet Union S.M. Budenny Military Academy of Communication (St. Petersburg) E-mail: Kuzik78@mail.ru

A.V. Rabin – Ph.D. (Eng.), Associate Professor, 

Department of Aerospace Computer and Program Systems; Director of the Centre for Scientific Research Coordination, 

St. Petersburg State University of Aerospace instrumentation  E-mail: alexey.rabin@guap.ru

In order to increase the noise immunity of information in radio communication systems in the VHF range, according to the estimates of the reception quality and depending on the interference situation in the communication channels, the following parameters can be reconstructed: the carrier frequency of the radio station, the radiation power, the transmission rate of information symbols, as well as the type of modulation and the method of coding and others.

A fairly large number of methods are known to increase the efficiency of changing the adaptation parameters of communication security control complexes (CSCC) in high-frequency ranges (VHF, UHF, SHF, EHF) when receiving information via radio channels, but they have a number of disadvantages. The most significant of them is that, firstly, these methods do not affect the microwave range (3-30 GHz) and, secondly, in the overwhelming majority of cases, they allow organizing reactive control of the (CSCC) parameters, which leads to time-consuming recovery working condition.

The promptness of changing the adaptation parameters of radio devices when receiving information in radio communication systems of the VHF range is achieved by the fact that discrete information comes from the transmitting side, and on the receiving side, based on this information, a decision is made on multiparameter adaptive control of the communication process.

In the known methods, out of their entire set, only the most significant ones are selected as adaptation parameters, namely: the frequency at which information is exchanged; transmission rate and radiation power of radio transmitting devices. The possibilities for changing the directional patterns of the transmitting and receiving antennas, which make it possible to increase the ratio Psignal ≤Pnoise at the receiver input, which affects the deterioration of noise immunity, are not taken into account.

Thus, it is proposed to develop a method for changing the adaptation parameters of radio equipment when the quality of the communication channel deteriorates, which makes it possible to reduce the downtime of the radio communication channel and increase the noise immunity of transmitted discrete information in VHF radio communication systems.

The proposed method is based on the fact that when working in the direction of radio communication, a set of frequencies set for communication, allocated for the operation of radio equipment, the radiation pattern of transmitting and receiving antennas and the possibility of changing them, the ability of radio equipment to change the speed of information transmission, as well as many gradations of power values. As a result, the efficiency of changing the parameters increases, the reliability of the transmitted discrete information and the downtime of the radio communication channel decreases.

The results obtained can be used to construct systems designed to receive and transmit information under conditions of limited private resource and to ensure electromagnetic compatibility of communication systems.

Lipatnikov V.A., Kuzin P.I., Rabin A.V. The method of increasing the reliability of noise immunity when receiving information in radio communication systems of the SHF and EHF ranges. Radiotekhnika. 2020. V. 84. № 8(16). P. 5−12. DOI: 10.18127/j00338486-202008(16)-01 (In Russian).

1. Gutkin L.S. Proektirovanie radiosistem i radioustrojstv. M.: Radio i svyaz'. 1986 (In Russian).
2. Kuzin P.I., Lipatnikov V.A., Potapov I.A. Sposob operativnosti smeny parametrov adaptacii radiosredstv v UKV-diapazone. Voprosy oboronnoj tekhniki. Seriya 16: Tekhnicheskie sredstva protivodejstviya terrorizmu. 2020. № 3−4 (141−142). S. 53−58 (In Russian).
3. Rabin A.V., Lipatnikov V.A., Kuzin P.I. Signal protection methods in channels with Nakagami fading. «International Conference on Metrological Support of Innovative Technologies» (ICMSIT-2020). Krasnoyarsk: Journal of Physics. Conference Series. 
4. Lipatnikov V.A., Kuzin P.I., Rabin A.V. Peredachi signalov v kanalah svyazi s zamiraniyami Nakagami. Uspekhi sovremennoj radioelektroniki. 2019. № 11. S. 71−78. DO: 10.18127/j20700784-201911-11.
5. Lipatnikov V.A., Carik O.V. Metody radiokontrolya. Teoriya i praktika. Monografiya. Ser. «Sistema tekhnicheskoj zashchity informacii v Rossijskoj Federacii». SPb: 2018. 607 s. (In Russian).
6. Komarovich V.F., Sosunov V.N. Sluchajnye radiopomekhi i nadezhnost' KV-svyazi. M.: Svyaz'. 1977. 136 s. (In Russian).
7. Lipatnikov V.A., Kuzin P.I. Method of adaptive measurement of parameters of radio emission sources in the microwave range. Metrology in radio electronics. Abstracts of scientific and technical conference reports. FSUE «All-Russian research Institute of physicaltechnical and radio-technical measurements». 2016. P. 146−156.
8. Patent na izobretenie 2419805 C1, 27.05.2011 (RU). Sposob pelengacii radiosignalov i pelengator dlya ego osushchestvleniya. /  Al' H.N., Balyasov A.E., Belov A.V., Lipatnikov V.A., Carik O.V., Starchikov A.D. Zayavka № 2009135472/09 ot 23.09.2009 (In Russian).
9. Patent na izobretenie ot 13.07.2005 № 2295761. Ustrojstvo avtomaticheskogo vybora rabochih chastot. / Bitkov A.N., ZHilin A.V., Kasibin S.V., Komarovich V.F., Kuznecov S.I., Lipatnikov V.A. (In Russian)
10. Lipatnikov V.A., Kuzin P.I. Metod povysheniya operativnosti smeny parametrov adaptacii pri prieme informacii v sistemah radiosvyazi KV- i UKV-diapazonov. Avtomatizaciya processov upravleniya. 2016. № 4 (46). S. 18−22 (In Russian).