Items of № 6, 2018

The Electrosvyaz Magazine is one of the leading science & technical magazines in Russia.

DESIGN FEATURES AND EMC-CHARACTERISTICS OF FUTURE EQUIPMENT OF 5G MOBILE COMMUNICATION NETWORKS

V.O. Tikhvinskiy, JSC NIITC, deputy general director for innovative technologies, MTUCI, professor, Dr.Sci. (Econ.); vtniir@mail.ru

To solve a large number of tasks related to the future implementation of 5G mobile communications, such as the regulation of the use of the radio frequency spectrum, licensing, the development of radio equipment and solution of intersystem tasks of electromagnetic compatibility (EMC), it is necessary to know the technical and EMC-characteristics recognized by the leading international communication organizations: ITU, CEPT, 3GPP, ETSI, etc. During 2017 this task has been solved within the framework of ITU and 3GPP working groups activity, but these characteristics differ in terms of the scope of the parameters and their quantitative values. The article deals with a comparative analysis of the technical and EMC-characteristics of 5G radio equipment and the reasons that caused these differences.
 Keywords: ITU, 3GPP, electromagnetic compatibility, 5G RAN, 5G Core, IMT-2020.


BASIC CHARACTERISTICS OF COMMUNICATION SYSTEMS WITH ADAPTIVE AMPLITUDE MODULATION

M.A. Bykhovskiy, MTUCI, professor, Dr.Sci. (Tech.); bykhmark@gmail.com

In this article the author proposes a new method of signal design. The method is intended for signals, belonging to the class of multidimensional surface-spherical ensembles of signals (SSES), which allow to create highly reliable communication systems for message transmission. Such systems possess high power and spectral efficiency which is close to the limit established by Shannon. The new kind of signal design is named as adaptive amplitude modulation (AAM). Formulas that allow to determine the probability of error in demodulation of the received signals and also to estimate power and spectral efficiency of communication systems which use the signal ensembles with AAM are obtained. The results presented in the article allow to choose parameters of signal ensembles with AAM in such a way that, on the one hand, the communication system would provide the demanded reliability of communication, defined by the probability of erroneous reception of signals and ii) its power and spectral efficiency would be close to the «ideal» limit of Shannon’s system, and on the other hand, the complexity of technical implementation of the communication system (which depends on the duration of signals) would keep to a minimum. It is noted that in such communication systems high reliability of reception of the transmitted messages can be ensured without application of error-correcting codes. It allows to significantly simplify the technical implementation of these systems.
Keywords: method of digital modulation, multidimensional signal ensemble, power and spectral efficiency of communication systems, noise immunity of signal reception.


MATHEMATICAL MODEL OF PLANNING OF THE ITS NETWORK, FUNCTIONING ON THE BACKGROUND OF PRIMARY NETWORK

A.S. Shchesniak, ITMO University, wireless communications department, postgraduate;
anna.schesnyak@scaegroup.com

The main focus of this work is concerned with the aggregated heterogeneous radio network for intelligent transportation system (ITS), working as a secondary service in the same spectral band with a primary fixed network. A mathematical model for secondary network coverage
area evaluation, taking into account conditions of electromagnetic compatibility, is proposed. Mechanisms for decreasing secondary network influence to the primary network by means of intellectual switching between nodes depending on the vehicle mobility, transceiver height, and antenna characteristics are discussed. The possibility of both networks collaborative operation with acceptable reduction of primary network capacity is shown.
Keywords: intelligent transport system, ITS, wireless networks, analytical model, approximation.


INTERFERENCE IMMUNITY OF USER NAVIGATION EQUIPMENT OF SATELLITE RADIO NAVIGATION SYSTEMS WITH FOUR-ELEMENT ANTENNA ARRAY

V.N. Yudin, Moscow Aviation Institute (MAI), department of theoretical radio engineering, professor, Dr.Sci. (Tech.); vn_yudin@mail.ru
Eu.A. Kamnev, MAI, department of theoretical radio engineering, postgraduate; ekam91@yandex.ru

The computer simulation model of the four-element adaptive antenna array is developed. Interference immunity of adaptive antenna array in conditions of the influence of spatially distributed jammers is investigated. Two scenarios of jamming of adaptive antenna array by ground-based and air-based jammers are considered. In the case of ground-based jammers, high requirements for their energy are ascertained due to the impact on the sidelobes of the radiation pattern of the non-adaptive antenna array and the improvement by signal processing up to 5 dB.
Keywords: adaptive antenna array, beamformer, satellite radio navigation systems, user navigation equipment, jamming, interferenceimmunity, space-time signal processing.


THE INTERFERENCE SPECTRUM FOR RADIOELECTRONIC SUPPRESSION OF BROADBAND SYSTEMS

A.I. Kuprijanov, MAI, professor, Dr.Sci. (Tech.); aik@mai.ru

Influence of ratio of spectral widths of signal and interference, applied to counteract the operation of the information transmission system, on noise immunity is considered.
Keywords: suppression factor, noise stability, noise immunity, radio interference bandwidth, signal bandwidth.


METHOD OF OPERATIVE RADIO COMMUNICATIONS MANAGEMENT DURING FORMULA 1 RUSSIAN GRAND PRIX

A.V. Ilchenko, Rostov State Transport University (RSTU), postgraduate, autonomous non-profit organization ROSGONKI, head of the communication department; ilchenko@rosgonki.ru
M.A. Butakova, RSTU, dean of the department of management information technologies, professor, Dr.Sci. (Tech.); butakova@rgups.ru
O.S. Labunko, Branch of FSUE General Radio Frequency Centre in the Southern and North Caucasian Federal Districts, director, Ph.D.; info_uskfo@rfsrf.ru

The article considers the problems of regulation of the radio frequency spectrum used during international sport events at Sochi Autodrome, Russia. Radio frequency spectrum utilization in the racing area and radio interference factors are analyzed. Analysis of requirements for staff radio communication equipment is presented. Key points of the method of using the radio-electronic equipment in the area of Sochi Autodrome are given.
Keywords: organization of radio communications, autodrome, operative communications, radio communications management, regulation of radio communications.


ESTIMATION OF BANDWIDTH OF RADIO COMMUNICATION SYSTEMS WITH COHERENT FREQUENCY-CODE DIVISION

V.A. Sivov, Military Academy of the Strategic Missile Forces named after Peter the Great (MA SMF), senior researcher, Ph.D.
V.A. Vasiliev, MA SMF, senior researcher, associate professor, Ph.D.
V.F. Moiseev, MA SMF, senior researcher, Ph.D.; mvwvas@rambler.ru
M.V. Savelieva, MA SMF, senior researcher, Ph.D.; marina-savelieva-62@mail.ru

It is shown that in a limited RF band it is possible to realize the radio signal multiplexing at coherent frequencies by means of truncation of the broadband signal spectrum at each of the coherent frequencies. The capacity of radio communication systems was estimated for binary (inverse) and M-nary amplitude-inversion modulation of broadband signals, in which the capacity of radio communication systems considerably exceeds the allocated radio frequency band.
Keywords: bandwidth, coherent frequency array, pseudorandom sequence, orthogonal code division multiplexing, quadrature channels, information channels.


END-TO-END SYSTEM STRUCTURE FOR LATENCY SENSITIVE APPLICATIONS OF

A. Ateya, The Bonch-Bruevich Saint-Petersburg State University of Telecommunications (SPbSUT), department of communication networks and data transmission, postgraduate; a_ashraf@zu.edu.eg
M. Al-Bahri, SPbSUT, department of communication networks and data transmission, postgraduate; albahri.89@hotmail.com
A. Muthanna, SPbSUT, department of communication networks and data transmission, associate professor; ammarexpress@gmail.com
A. Koucheryavy, SPbSUT, head of the department of communication networks and data transmission, Dr.Sci. (Tech.), professor; akouch@mail.ru

The end-to-end system structure for IoT and Tactile Internet applications of 5G networks is proposed. This system structure based on the MEC, NFV, SDN and D2D technologies. Four levels of the edge cloud units including cloudlet, micro-cloud, mini-cloud and main cloud are proposed. The four cases of the offloading process are examined in detail. The simulation was made by CloudSim system. The proposed system presents better efficiency in terms of latency.
Keywords: IoT/5G, device-to-device, D2D, multi-level, cloud, SDN/NFV.


ROUTING TABLE CORRECTION ALGORITHMS IN SIMULATOR OF DATA NETWORK WITH HIGH RELIABILITY AND SECURITY

M.A. Basarab, Bauman Moscow State Technical University (BMSTU), head of the department of information security, professor, Dr.Sci. (Phys.-Math.); bmic@mail.ru
R.A. Belfer, BMSTU, department of information security, senior researcher, associate professor, Ph.D.; a.belfer@yandex.ru
A.V. Kravtsov, Scientific Research and Testing Center of Central Research Institute of the Air Forces, senior researcher; skyak@78@gmail.com

It is provided the analysis of the standardized algorithm of routing table correction when the state of commun cation channels and switching nodes in a common channel alarm system is changed. The shortcomings of this algorithm in terms of ensuring reliability and information security are noted. In order to improve the reliability and information security of data network simulator of the educational laboratory stand, created by teachers and students of the information security department of the Bauman Moscow State Technical University, the correction algorithm assuming incomplete automation has been developed. The basic provisions of this algorithm, using the messages arriving in the network operation center, are described.
Keywords: data network, SS7, information security, reliability, network operations center.


SMART TECHNOLOGIES AND THREATS TO INFORMATION SECURITY

O.V. Erokhina, Financial University under the Government of the Russian Federation, department of political science, associate professor, Ph.D.; o.v.erokhina@gmail.com

The article has proved the need for purposeful work on the formation of public opinion, favorable for the development of digital economy and creation of effective feedback channels. The conclusion is made that the development of reliable content filtering systems is one of the actual directions for implementing smart management technologies.
Keywords: information security, info-communications, smart technologies, content filtering.


VISUALIZATION OF ELECTROMAGNETIC ENVIRONMENT NEAR DIGITAL TRANSMISSION SYSTEM ANTENNA

M.Yu. Zvezdina, Don State Technical University (DSTU), head of the radioelectronics department, Dr.Sci. (Phys.-Math.); zvezdina_m@mail.ru
Ju.A. Shokova, DSTU, radioelectronics department, associate professor, Ph.D.; zvezdina_m@mail.ru
H.T.A. Al-Ali, DSTU, radioelectronics department, undergraduate; haidertha@mail.ru
G.H.A. Al-Farhan, DSTU, radioelectronics department, undergraduate; haidertha@mail.ru

It is shown that the digital economy development in Russia is due to the inclusion in global information systems. By 2020 their transport network will be made of digital transmission systems with mobile networks on the final stage. It is proved that at the first stage of the two-stage deployment of such networks, there will be a general transition to 4G networks and selective deployment of 5G networks. The comparison results of the electromagnetic environment on a building roof, carrying systems of panel antennas for 4G and 3G networks, are presented. It was revealed that at the same transmitter power the maximum energy flux density for the LTE network is practically 3 times less than for the GSM network. It is concluded that if the height of antenna installation is more than 5 m above the rooftop, the roof can be considered safe for people for an unlimited time.
Keywords: electromagnetic environment, antenna, digital transmission systems, visualization of energy flux density distribution.

 

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