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SCIENTIFIC WORK

SCIENTIFIC AND TECHNICAL JOURNAL «RADIO COMMUNICATION THEORY AND EQUIPMENT» ISSUE 1, 2012

THE POTENTIAL CAPABILITY OF WIRELESS DISTANCE INCREASE IN MICROWAVE DATA TRANSMISSION MOBILE SYSTEMS

A.V. Zyulkov, associate professor, Voronezh State University, e-mail: zyulkov@phys.vsu.ru
Yu.S. Sukhorukov, deputy director on science, JSC «Sozvezdie» Concern», tel.: (473) 255-96-99

A quantitative evaluation of communication growth in the range of decimetric waves when subscriber moves along a rough terrain and in the case of packets retransmission is presented.

Key words: decimetric waves mobile systems, communication range, terrain roughness, spikes of Gaussian random process.


THE PROCEDURE OF MODELING THE POWER RATIO FOR SIGNALS PROVIDED BY THE BASE STATION AND THE USER TERMINALS’ BLOCKING MODULE OVER THE MOBILE COMMUNICATION FREQUENCY BANDS

A.V. Lenshin, professor, Military Aviation Engineering University, e-mail: andrey-lenshin@yandex.ru
V.P. Likhachev, professor, Military Aviation Engineering University, e-mail: lvp_home@mail.ru
E.B. Khanov, senior research worker, State Scientific and Technical Center «Nauka», tel.: 8-921-936-67-14

A mathematical model for the power of signals provided by the blocking module and a mobile base station at the mobile communication user terminal receiver’s input is suggested. The analytical expression for the signals’ power ratio with consideration for the factors that affect the blocking module’s signal power is derived. The requirements for the power potential of the blocking module for specific cellular communication standards are analyzed.

Keywords: mobile communication blocking module, radio wave attenuation, power potential of a blocking module.


EFFICIENCY CAPACITY OF LASER COMMUNICATION SYSTEMS UNDER FROM ATMOSPHERICS' CONCLUSIONS

A.L. Mitrofanov, senior research engineer, JSC «Sozvezdie «Concern», tel.: (473) 223-31-92

The dependencies system laser communications signal-noise relaxations was conclusion by the meteorology states from scattering medium welding pass.

Key words: laser system transmitting, optical weather, signal-noise ratio.


COUNTERACTION TO FREQUENCY HOPPING RADIOCOMMUNICATION SYSTEMS WITH THE HELP OF UNMANNED AERIAL VEHICLES

N.M. Tikhomirov, head of Scientific and Technical Centre, e-mail: tikhomir@sozvezdie.su
N.V. Sementsov, design engineer, e-mail: sementsovnik@mail.ru
A.Yu. Mankov, design engineer, e-mail: timon-ma89@mail.ru
JSC «Sozvezdie» Concern»

Capability to counteract with frequency hopping radiocommunication systems with the help of UAVs is considered. Connection between effective interference liability impact on radio communication system and relative position of radioreceiver, radiotransmitter and noise station is shown. Description of some UAVs' types assigned for electronic warfare is given. Basic lines of development of electronic warfare means for UAVs are denoted.

Keywords: radiocommunication system, frequency hopping, reconnaissance and suppression station, electronic warfare, noise-immunity, unmanned aerial vehicle (UAV).


NETWORK TOPOLOGY FORMATION FOR PROACTIVE ROUTING ALGORITHM

T.F. Kapaeva, leading engineer, tel.: (473) 252-58-22
A.E. Limarev, deputy head of department, e-mail: limarev@sozvezdie.su
Yu.N. Maksyuta, acting head of sector, tel.: (473) 252-58-22
V.G. Markin, deputy head of Scientific-Research Centre, tel.: 8-960-111-09-38
M.V. Smagina, leading engineer, tel.: (473) 252-58-22
JSC «Sozvezdie» Concern»

The paper presents two algorithms for topology formation in MANETs (mobile ad hoc networks), which are based on the selection of multipoint relays (MPR), thus reducing redundant broadcast transmission. The first algorithm that is a modification of Necessity First Algorithm (NFA) allows to select MPR, creating the route from the source to any node in the network. The second algorithm based on the construction of a minimum connected dominating set (MCDS) generates the network topology independent of the source node. Computer simulation of the ad hoc network is performed and comparative analysis is conducted for MPR sets obtained using the above-mentioned algorithms.

Key words: MANETs, routing, multipoint relays (MPRs), minimum connected dominating set.


APPLICATION OF FRACTAL METHODS FOR THE ANALYSIS OF MULTIFUNCTION SYSTEMS RADIO CHANNELS CONTROL

A.N. Asoskov, director of Scientific and Technical Complex, tel.: 8-980-242-06-10
I.N. Malysheva, leading programming engineer, tel.: (473) 279-93-24
JSC «Sozvezdie» Concern»

Possibility of fractal analysis methodology application for radio engineering complexes systems control is considered. Experimental estimation of critical application control system hierarchy level fractal behavior is given.

Key words: unstable dynamic system, fractal analysis, hierarchical structure, information influence.


FORMALIZED DESCRIPTION OF THE SYSTEM SUPPORTING COMMUNICATION OPERATOR BUSINESS AND OPERATIONAL ACTIVITY RESEARCH PROCESS

V.P. Mochalov, head of chair, e-mail: kafasoiu@stv.runnet.ru
S.V. Yakovlev, associate professor, e-mail: yakovlev_sv@ncstu.ru
D.V. Mochalov, graduate, e-mail: kafasoiu@stv.runnet.ru
North and Caucasian State Engineering University

The model and the evaluation method of a state of OSS/BSS system of the telecommunications operator considering requirements to creation of NGOSS operations support systems and defining characteristics demanded for an estimation of its efficiency are developed.

Keywords: business process, billing, telecommunications, operations support system, support system of business processes.


DATA ACCESSIBILITY INDEX DEFINITION METHOD IN MOBILE WiMAX NETWORKS

V.V. Yakimenko, graduate, e-mail: vyakimenko@zarya-k.ru
A.V. Yakimenko, graduate, e-mail: ayakimenko@zarya-k.ru
P.L. Savinsky, deputy head of Scientific and Technical Department, e-mail: savinsky@sozvezdie.su
JSC «Sozvezdie» Concern»

Definition and forecast method of data accessibility indices in mobile WiMAX networks based on application of network functioning retrospective data is proposed.

Keywords: base station, subscriber station, data accessibility, WiMAX networks.


NOISE ANALYSIS SPECIFIED BY LASER ATMOSPHERIC LINK REFLECTION AND NOISE TUNE-OUT TECHNIQUES

S.V. Artyshchenko, senior research engineer, e-mail: artichenko@mail.ru
E.L. Kuchin, head of department
JSC «Sozvezdie» Concern»

Noise analysis of laser atmospheric link specified by transmitted signal reflection of abonent receiving devices depending on base transmitter–receiver systems characteristics and communication conditions is carried out.

Keywords: laser atmospheric communication, reflection.


STACKED PATCH MIMO ANTENNA FOR 2,3–2,7 GHz FREQUENCY BAND

E.S. Makarov, senior research engineer, JSC «Sozvezdie «Concern», e-mail: ant@sozvezdie.su

A new design of two-layer dual-polarized patch antenna is proposed and numerically studied. Good front-to-back ratios, gain characteristics (over 8 dBi) and low isolation level (below –20 dB) are observed in broad frequency band.

Keywords: microstrip antennas, dual-polarized antennas, MIMO antennas.


EVIDENCE AND ALTERNATIVE OF EFFECTIVE METHOD OF ADAPTIVE DIGITAL FILTER IMPLEMENTATION

A.V. Veligosha, associate professor, Stavropol Institute for Management, e-mail: aveligosha@mail.ru

It is demonstrated that efficiency of adaptive digital filter performance is determined by acquisition a minimum error when computing its weight vector. The alternative of adaptive digital filter implementation on basis of nonpositional arithmetic application both for finite-impulse response filter implementation and for adaptive digital filter adaptation system was reasoned was justified and chosen.

Key words: adaptive digital filter, adaptation system, weight vector, algorithm, minimum of objective function, required signal, error value, input, output, adaptation rate, iteration, nonpositional arithmetic, residue system, module, data processing.


EFFICIENCY AND DATA TRANSMISSION TIME DELAY IN LINK-LEVEL PROTOCOL IEEE 802.11

A.V. Zyulkov, associate professor, Voronezh State University, e-mail: zyulkov@phys.vsu.ru
A.A. Efanov, engineer-programmer, JSC «Sozvezdie» Concern», e-mail: a2efanov@box.vsi.ru

Comprehensive study of average throughput values dependency and packet processing time in saturated IEEE 802.11 DCF network conditions depending on MAC-level protocol parameters is given.

Keywords: wireless networks, IEEE 802.11 DCF standard, performance analysis, saturation, throughput, media access delay.


EFFICIENCY INCREASE OF ELECTROMAGNETIC ENVIRONMENT COMPUTER SIMULATION TECHNIQUE IN RADIOELECTRONIC MEANS GROUPING

A.D. Korobova, associate professor, Voronezh State University, tel.: (473) 252-08-33
E.A. Khromykh, leading research engineer, JSC «Sozvezdie» Concern», tel.: (473) 251-50-02

Efficiency increase of electromagnetic environment computer simulation technique in radioelectronic means grouping at the expense of data input efficiency increase in radioelectronic means grouping computer model is considered. It is achieved by optimization of selecting integration forms of software developed beforehand and realized in MathCAD with means of MATLAB that allows to solve complex electromagnetic environment analysis problems in mobile radioelectronic means groupings more operatively.

Keywords: simulation, mobile radioelectronic means grouping (REM), electromagnetic environment, waveform shaping and processing signal path, blanketing, MathCAD, MATLAB.


AUTOCORRELATION FUNCTION AND SPECTRAL DENSITY OF THE MODIFIED PHASE-SHIFT BROADBAND SIGNAL

G.S. Nakhmanson, professor, Voronezh Military Aviation Engineering University, tel.: (473) 226-44-83
I.N. Masnev, design engineer, JSC «Sozvezdie» Concern», e-mail: Ivashka_m@mail.ru

Phase-shift broadband signal (PSBS) mathematical model with phase-sweeping between elementary impulses has been proposed. Analytical expressions for correlation function and spectral density of such signal have been obtained and analysed. It is shown that autocorrelation function (AF) of PSBS with phase-sweeping doesn’t differ much from AF PSBS with phase hopping and side lobe amplitudes are redistributed in spectral density.

Key words: phase-shift broadband signal, autocorrelation function, spectral density, side lobes.


ASSESSMENT OF THE FEASIBILITY OF DIGITAL MODEM BASED ON CASCADE SIGNAL-CODE STRUCTURE USING COMPUTER IMITATING SIMULATION

Ň.N. Skobelkina, design engineer, e-mail: tskobelkina@inbox.ru
S.Ĺ. Borzakova, programming engineer, e-mail: water-nymph@inbox.ru
JSC «Sozvezdie» Concern»

Algorithms for constructing a modem of consecutive encoding/decoding of BCH and OCDM and the results of computer simulation are presented.

Key words: digital modem, computer simulation, BCH, OCDM.


PORTRAITS OF JOINT CORRELATION FUCTIONS IN LEVELS FOR M-SEQUENCES

A.A. Bessarabova, tel.: (473) 224-33-60

On basis of correlation functions analysis and M-sequences correlation spectra N = 16 383 long which were computed by the author, the most important feature of correlation function is reviewed – values of levels, accepting its spikes. The concept of an interval between levels, which is typical for each correlation function is introduced. Portraits of correlation functions in levels are formed – values of levels for correlation functions with different values of interval between levels and number of levels.

Key words: correlation function, correlation spikes, interval between levels.