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

Federal State Military Educational Institution Of Higher Education «Marshall Of The Soviet Union S.M. Budenny Military Academy Of Communication» (St. Petersburg)

E-mail: lipatnikovanl@mail.ru

P.I. Kuzin – Lecturer, Chair Of General Professional Disciplines,

Federal State Military Educational Institution Of Higher Education «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, Director Of The Centre For Scientific Research Coordination, 

SUAI, Federal State Autonomous Educational Institution Of Higher Education «St. Petersburg State University Of

Aerospace Instrumentation»

E-mail: alexey.rabin@guap.ru

The transmission of information in communication and broadcasting channels using a free space of radio waves is always accompanied by fluctuations in the signal amplitude. Usually, two types of amplitude fluctuations are distinguished – fast and slow fading. The reason for fast fading is the multipath structure of the signal and interfering rays. The reason for slow fading is the shadowing of the first Fresnel half-band of the radio signal on the track due to the relief features.

Since the nature of fast and slow fading is different, their influence is usually considered separately. In most cases, the probability density distribution of the envelope of a radio signal during fast fading is described by the Rayleigh law. At the same time, some published papers indicate that the signal level in urban conditions can be a subject to deeper fading, with the deepest fading observed near the transmitting point. Depending on the nature of the propagation path, the envelope of fast fading (signal fluctuations) can have different distributions.

Lipatnikov V.A., Kuzin P.I., Rabin A.V. Methods of signals’ transmission in communication channels with Nakagami fading. Achievements of modern radioelectronics. 2020. V. 74. № 8. P. 56–62. DOI: 10.18127/j20700784-202008-06. [in Russian]

1. Sklyar B. Tsifrovaya svyaz'. Tekhnicheskie osnovy i prakticheskoe primenenie. Per. s angl. M.: Vil'yams. 2004. [in Russian]
2. Lipatnikov V.A., Tsarik O.V. Metody radiokontrolya. Teoriya i praktika. Monografiya. Ser. «Sistema tekhnicheskoy zashchity informatsii v Rossiyskoy Federatsii». SPb.: 2018. [in Russian]
3. Chuchin E.V. Sistema modeley kachestva peredachi tsifrovykh signalov po radiokanalam s zamiraniyami Nakagami. Nauchnyy zhurnal Kurskogo gosudarstvennogo universiteta. 2014. № 1. S. 42–44. [in Russian]
4. Kiselev I.G., Andrianov M.N. O povyshenii pomekhozashchishchennosti peredachi diskretnykh soobshcheniy v kanalakh s zamiraniyami. M.: Mobil'nye sistemy. 2007. № 4. S. 13–16. [in Russian]
5. Andrianov M.N. Osobennosti preryvistoy svyazi v kanale s lognormal'nymi zamiraniyami. M.: Metrologiya. 2009. № 5. S. 35–43.  [in Russian]
6. Rabin A.V., Dobrosel'skiy M.A., Lipatnikov V.A. Issledovanie kharakteristik pomekhoustoychivosti pri ispol'zovanii ortogonal'nogo kodirovaniya. Voprosy radioelektroniki. M.: TsNII «Elektronika». 2018. № 10. Ser. «Obshchetekhnicheskaya» (OT). V. 6. S. 80–85.  [in Russian]
7. Rabin A.V. Ortogonal'noe kodirovanie kak sposob povysheniya pomekhoustoychivosti pri peredache signalov po mnogoluchevym kanalam s zamiraniyami. Datchiki i sistemy. M.: OOO «Sensidat-Plyus». 2019. № 4 (235). S. 7–12. [in Russian]
8. Lipatnikov V.A., Kuzin P.I. Metod povysheniya operativnosti smeny parametrov adaptatsii pri prieme informatsii v sistemakh radiosvyazi KV- i UKV-diapazonov. Avtomatizatsiya protsessov upravleniya. 2016. № 4 (46). S. 18–22. [in Russian]
9. Patent RF № 2295761. Ustroystvo avtomaticheskogo vybora rabochikh chastot. Bitkov A.N., Zhilin A.V., Kasibin S.V., Komarovich V.F., Kuznetsov S.I., Lipatnikov V.A. Prioritet ot 13.07.2005. [in Russian]