Items of № 5, 2015

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

INTERNATIONAL MONITORING OF THE INFOCOMMUNICATION DEVELOPMENT ON THE REGIONAL SPACE

N.E. Zorya, Regional Commonwealth in the field of Communications Executive Committee, Deputy Director General, MTUCI, Associate Professor, Ph.D.; zorya@rcc.org.ru

The article presents the analysis results of the Regional Commonwealth in the field of Communication countries’ infocommunication market according to the various parameters of infocommunications compared to the global development of infocommunications on four composite indexes of readiness for e-development and change estimates of the indexes of readiness for e-government and development of the governmental websites of the RCC countries. According to the analysis results there are the conclusions on the specifics and prospects of the regional infocommunication development of the RCC participants’ countries.
Keywords: information space, infocommunications, composite indexes, Networked Readiness Index, e-Government Development Index, ICT Development Index.


 

PARAMETRIC SPECTRAL ANALYSIS OF RANDOM SIGNALS WITH USE OF RECURRENT CIRCULANT MODELS OF THE MOVING WINDOW

V.P. Volchkov, MTUCI, Professor, Dr.Sci. (Tech); volchkovvalery@mail.ru
N.E. Poborchaya, MTUCI, Docent, Ph. D.; n.poborchaya@mail.ru
A.M. Shloma, MTUCI, Professor, Dr.Sci. (Tech); alremizov@yandex.ru

Parametric spectral analysis technique of discrete random signals on a finite time interval, based on the recurrent circulant model of the second dynamic order is presented. Exact analytic expressions of spectrum density the signals in the basis of discrete-continual exponential function are produced. Simulation results confirming а good property of approximation are presented.
Keywords: random signal, power spectrum density, spectral analysis, autoregressive model, recurrent circulant model.


 

COMPUTING RESOURCES OPTIMIZATION OF THE MULTIPATH FADING CHANEL SIMULATOR

L.N. Kazakov, P.G. Demidov Yaroslavl State University, Department chief, Dr.Sci. (Tech); kazakov@uniyar.ac.ru
D.M. Solovyev, P.G. Demidov Yaroslavl State University, Ph.D. student; soldm89@gmail.com

This paper presents method of computing resources optimization of the real-time multipath fading channel simulator. This method reduces computing complexity of simulator and allows implementing it on existing hardware (e.g. field-programmable gate arrays). The optimization criterion is also proposed.
Keywords: multipath fading channel, multipath fading channel simulator, field-programmable gate array.


 

CORRELATION METHOD TO ESTIMATE THE INTERMODULATION DISTORTION OF THE MICROWAVE SIGNALS IN THE POWER AMPLIFIERS

L.A. Belov, Moscow Power Engineering Institute (National Research University), Professor, Ph.D.; belovla@gmail.com
A.S. Kondrashov, Russian Space Systems, JSC, Deputy head of department, Ph.D.; ak-rks@ya.ru
S. V. Petushkov, Russian Space Systems, JSC, Research engineer; sp-rks@ya.ru

The problems of estimating the level of the microwave signals intermodulation distortion in the transmitters of terrestrial and satellite repeaters, base stations and client terminals of the mobile communication are considered. Estimation criteria of these distortions are compared. It is shown that there are substantial differences in quantitative values. The causes of such discrepancies are analyzed. It is shown that it is necessary to consider the probability distribution function of amplified signal amplitude, not its crest factor, when selecting the operating mode of the power amplifier to achieve its maximum efficiency at an acceptable level of intermodulation distortion. Correlation method for measuring intermodulation distortion, which gives more accurate results and requires less resources, is proposed.
Keywords: power amplifier; peak factor; intermodulation distortion; amplitude distribution; amplitude compression; amplitude to phase conversion; correlation.


 

PM AND AM NOISE IN THE QUADRATURE LC-OSCILLATORS WITH PHASE SHIFTING RC-CIRCUITS

D.V. Kochemasov, National Research University «Moscow Power Engineering Institute», Ph.D. student; kochemasovdv@gmail.com
V.N. Кuleshov, National Research University «Moscow Power Engineering Institute», professor, Dr.Sci. (Tech); vnk37@mail.ru

Results of the operation mode and PM-AM noise investigation of the ring quadrature LC-oscillators with integrating type phase shifting RC-circuits are presented. Disclosure of analytic methods of the oscillators operation mode and PM-AM noise calculation is illustrated by such characteristics calculation for some particular examples of the oscillators. Outcome of these calculations is compared with results of computer simulation in the package ADS.
Keywords: quadrature oscillator, ring quadrature oscillator, PM and AM noise, periodic nonstationarity, computer simulation.


 

SPECTRAL AND NOISE CHARACTERISTICS OF SINEWAVE RC-OSCILLATORS

E. M. Drozdova, National Research University «Moscow Power Engineering Institute», PhD student; drozdovaem1989@mail.ru
T. I. Boldyreva, National Research University «Moscow Power Engineering Institute», associate professor, Ph.D.; boldyrevati@yandex.ru
V. N. Кuleshov, National Research University «Moscow Power Engineering Institute», professor, Dr.Sci. (Tech); vnk37@mail.ru

Results of two different circuits of RC harmonic oscillators comparative study are presented. The first of the oscillators has the Wien bridge in the positive feedback circuit of the differential amplifier. The second one has the double T bridge in the negative feedback circuit of the differential amplifier and an amplitude limiter in the positive feedback circuit. The comparative study has shown that the second oscillator has both lower nonlinear distortions and lower PM noise level. Results of both RC oscillators ADS simulation and results of the oscillator with double T bridge experimental study are also presented.
Keywords: RC-oscillator, Wien bridge, elimination filter, twin T-bridge, phase (PM) noise, nonlinear distortion.


 

VARICAP TUNED RESONANT CIRCUIT LINEARIZATION

M.P. Savchenko, Immanuil Kant Baltic Federal University, Kaliningrad, head of the telecommunications department, Ph.D.; savchenkomp@mail.ru
O.V. Starovoitova, Immanuil Kant Baltic Federal University, Kaliningrad senior teacher of telecommunications department; ostar39@mail.ru

It is proposed to use bias voltage correction to compensate the amplitude signal influence on average for the period of oscillation varicap capacitance and thereby to eliminate the asymmetry of the amplitude frequency response, which is inherent to a nonlinear circuit.
Keywords: resonant contour, varicap, counter and consecutive connection of varicaps, amplitude-frequency characteristic of a nonlinear resonant contour, stabilization of frequency of control of a resonant contour.


 

THE RELATIONSHIP BETWEEN DESCRIPTIVE, CONCEPTUAL AND MATHEMATICAL MODELS USED IN THE DEVELOPMENT OF RADIO COMMUNICATION SYSTEMS AND THEIR ELEMENTS

O.E. Kildisheva, “Russian Institute for Power Radiobuilding”, Director General, Ph.D.; kildisheva@rimr.ru
A.A. Smal, “Russian Institute for Power Radiobuilding”, post graduate student; smal_aa@mail.ru

Relationship between descriptive, conceptual and mathematical models which are used in the development of radio communication systems and their elements is presented in this article and example of modelling for antenna tuning unit is described.
Keywords: descriptive model, conceptual model, mathematical model, antenna tuning unit, performance, tuning accuracy.


 

TOP POSSIBLE PARAMETERS OF HF-BAND RADIO COMPLEXES, IMPLEMENTING THE MIMO TECHNOLOGY USING VARIOUS TYPES OF SEPARATION

A.V. Ogloblin, military unit, deputy commander , Moscow; homealeks@mail.ru

Typical antenna solutions for stationary and field HF-band radio complexes are considered. Limits on MIMO channel capacity are analyzed. Recommendations for antenna systems design for HF-band radio complexes are stated.
Keywords: HF range, field HF-band radio complexes, MIMO.


 

WAYS OF ORGANIZING, CLASSIFYING AND MAIN TECHNOLOGIES OF CORE LINE OF VIRTUAL PRIVATE NETWORKS

A.N. Gryazev, FGUP ZNIIS, Acting Director General; agryazev@zniis.ru

The article discusses ways of organizing, classifying and technology of VPN. It is shown that modern technologies allow to organize VPN overlay network with a full set of desired properties: with independent addressing system with a given bandwidth, reliability and information security.
Keywords: virtual private network, transport network, supported by the provider VPN, IP-network, quality of service.


FORMALIZED DESCRIPTION OF TRANSPORT TECHNOLOGY OF VIRTUAL PRIVATE NETWORKS

A.N. Gryazev, FGUP ZNIIS, Acting Director General; agryazev@zniis.ru

The article gives formalized description of transport technology of virtual private networks (VPN). It is shown that in the construction of virtual transport networks should be used as a criterion for the optimal value of the total minimum bandwidth you want to allocate a resource of primary trunk of public communication network.
Keywords: transport communication network, VPN technology, bandwidth resources, failure, crash, graph, reservation, restrictions, conditions of realization.


 

ANALYSIS OF INFORMATION PROCESSES IN MANAGEMENT ORGANIZATIONS FOR IMPLEMENTATION MODES OF DECISION SUPPORT

N.B. Bakanova, Keldysh Institute of Applied Mathematics RAS, Lead Sector, Ph.D; nina@keldysh.ru

The article discusses approaches to developing modes of decision support based on the research of information processes of organizational management and information resources accumulated as a result of administrative activity.
Keywords: organizational management, information processes, management activities, information resources, decision support.

 

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