THE MAIN PROSPECTIVE DIRECTIONS OF SYSTEM DESIGN OF NETWORKS AND SYSTEMS OF SATELLITE COMMUNICATIONS
I.N. Panteleymonov, FSBI NIIR, head of a laboratory; panteleimonov@niir.ru
L.O. Myrova, FSBI NIIR, leading researcher, professor, Dr.Sci.(Tech.); myrova@niir.ru
I.H. Yakhin, FSBI NIIR, deputy head of a department; yahin@niir.ru
V.V. Leshchenko, FSBI NIIR, leading patent specialist, Ph.D.; leshchenko@niir.ru
M.V. Todurkin, The Bonch-Bruevich Saint-Petersburg State University of Telecommunications, student; maks.todurkin@mail.ru
The article is devoted to promising directions of system design of satellite systems and communication networks. The main basic directions of work at all stages of system design of satellite systems and communication networks are discussed. The relevance of the article is due to the significance of the proposed system design measures in the development of promising satellite systems and communication networks.
Keywoards: satellite communication, satellite communication and broadcasting systems, repeater satellite, technical characteristics, system design, terms of reference, earth segment, orbital segment.
BEAM HOPPING TECHNOLOGY IMPLEMENTATION ACCORDING DVB-S2X ANNEX E STANDARD FOR NEW GENERATION VSAT NETWORKS
A.A. Zaharov, FSBI NIIR, deputy director general, associate professor, ph.D.; A.Zaharov@niir.ru
M.V. Lavrentyev, FSBI NIIR, senior engineer; lavrentev@niir.ru
K.M. Volgatkin, FSBI NIIR, head of laboratory; 026-v@niir.ru
The article provides an overview of the implementation of the basic principles of beam hopping technology implemented within the DVB-S2X Annex E standard. Scenarios for the application of this technology, primarily for satellites operating in geostationary orbits, are considered, although it is beginning to be widely used for non-geostationary satellites. The article analyzes the traditional approach using classic DVB-S2/S2X frames and describes its shortcomings for the implementation of beam hopping. The concept of superframes (Annex E) is considered, which makes it possible to adapt the DVB-S2X standard for beam hopping. Various formats and operating modes of superframes are described for the implementation of various beam hopping options.
Keywords: satellite communication, beam hopping, multibeam satellite, HTS, VSAT, DVB-S2, DVB-S2X, Annex E.
NOISE IMMUNITY, PROTECTION RATIOS AND OVERLOAD THRESHOLDS OF TV BROADCASTING SYSTEMS UNDER THE INTERFERENCE OF LTE-450 NETWORKS
A.A. Mochenov, FSBI NIIR, deputy head of a laboratory; mochenov@niir.ru
The article presents the results of experimental studies on the determination of protection ratios and overload thresholds for digital DVB-T2 and analogue K/SECAM TV broadcasting systems for the scenario of interference impact of signals of LTE base stations in the frequency range 450−470 MHz. The characteristics of noise immunity of television receivers are investigated. A method is proposed to increase the noise immunity of TV receivers when using a band pass filter that provides attenuation of the interference signal of the LTE base station.
Keywoards: digital terrestrial television, protection ratios, overload thresholds, band pass filter, DVB-T2, K/SECAM, LTE, UHF.
FEATURES OF THE MODERN STAGE OF THE INTERNATIONAL TELECOMMUNICATION UNION LIFE CYCLE
N.P. Reznikova, FSUE NIIR, chief researcher, professor, Dr.Sci. (Econ.); reznikova.natalya1946@yandex.ru
G.S. Artemyeva, Moscow Technical University of Communications and Informatics, department of the digital economy, management and business technologies, associate professor, Ph.D.; artemieva-g-s@yandex.ru
The results of the analysis of the features of the current stage of the life cycle of the International Telecommunication Union (ITU), carried out on the basis of an approach based on the tools of the Greiner’s growth model and the model of structural-logical analysis, are presented. It is shown that the ITU is in the fifth phase of its development, which has led to a crisis of attrition, complicated by unresolved problems that led to crises of control and mistrust in the past, as well as the newly emerging political and economic conditions in the world.
Keywoards: International Telecommunication Union, Greiner’s growth model, organization life cycle, phases, stages of development, crises, structural-logical analysis method, problem graph.
MASKING OF RADAR RADIATION FROM ELECTRONIC INTELLIGENCE USING A BUILT-IN NOISE GENERATOR
V.N. Yudin, Moscow Aviation Institute (MAI), department of theoretical radio engineering, professor, Dr.Sci.(Tech.); vn_yudin@mail.ru
A.M. Volkov, MAI, department of theoretical radio engineering, postgraduate; afv92@yandex.ru
A variant of noise masking of the radiation of a radar facility using a built-in noise generator is considered. Formula relations are derived for calculating the ratio of the power of the noise and probing pulses at the output of the radar transmitter. The effect of noise masking the radiation of the radar facility on the radar range is estimated.
Keywoards: radiation masking, electronic intelligence, built-in noise generator, active interference.
TWO-DIMENSIONAL SUPER-RESOLUTION DIRECTION FINDING IN AN AUTOMOTIVE MIMO RADAR UNDER TARGET CORRELATION CONDITIONS
V.T. Ermolaev, Lobachevsky State University of Nizhny Novgorod (UNN), department of statistical radiophysics and mobile communication systems, professor, Dr.Sci.(Tech.); ermolaev752@gmail.com
V.Yu. Semenov, UNN, department of radioengineering, senior lecturer, Ph.D.; vitali.semenov@gmail.com
A.G. Flaksman, UNN, department of statistical radiophysics and mobile communication systems, professor, Dr.Sci.(Tech.); flak2402@gmail.com
I.V. Artukhin, UNN, department of statistical radiophysics and mobile communication systems, electronic engineer; igor.art009@gmail.com
O.A. Shmonin, UNN, department of statistical radiophysics and mobile communication systems, postgraduate; olgsh6@yandex.ru
The problem of two-dimensional direction finding in azimuth and elevation in an automotive radar of the telecommunications system of the advanced driver assistance system (ADAS) is considered. A group of algorithms for measuring the second angular coordinate using a flat antenna array of a MIMO radar is proposed. The minimum polynomial method (MPM) of the correlation matrix is used to measure angular coordinates. This method has super-resolution properties and works efficiently under a small number of signal samples. This method allows you to adaptively estimate the number of radiation sources. A target decorrelation algorithm is used, which increases the accuracy of elevation angle estimation. The performed numerical simulation showed the high efficiency of the proposed signal processing methods.
Keywoards: MIMO radar, tilt measurement, virtual antenna array, Walsh code.
ATTENUATION OF LASER RADIATION IN AEROSOLS
E.R. Milyutin, Dr.Sci.(Tech.); mma@spbgasu.ru
The attenuation of visible and infrared waves in fogs is considered, and the results of experimental work are presented. It is shown that empirical formulas give correct results in the visible and near-IR wavelength ranges. It is possible to extend some of these formulas to the middle IR range.
Keywords: laser, attenuation, fogs, aerosols.
CLASSIFICATION OF LEVELS OF STRUCTURAL AND FLOW STABILITY OF TELECOMMUNICATION DIRECTIONS
S.A. Jasinskii, S.M. Budyonny’s Military Academy of Communications, leading researcher, professor, Dr.Sci.(Tech.); yasinsky777@mail.ru
As a result of the analysis of developments in the distribution of information flows of telecommunication directions, the justification for the introduction of a classification of levels of structural and flow stability was carried out. An approach to the distribution of information flows based on the method of golden proportion and Shannon load distribution has been developed.
Keywoards: levels of structural and flow stability, telecommunication direction, Shannon load distribution, information flow distribution coefficient.
