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SCIENTIFIC WORK

SCIENTIFIC AND TECHNICAL JOURNAL «RADIO COMMUNICATION THEORY AND EQUIPMENT» ISSUE 2, 2012

THE METHODICAL APPROACH TO DESIGNING OF THE SUBSYSTEM OF MANAGEMENT INFORMATION-COMMUNICATION COMPLEX

I.N. Malysheva, leading programming engineer, tel.: 8-903-850-76-31
Yu.À. Plakhotnyuk, leading design engineer, tel.: 8-903-650-64-25
JSC «Sozvezdie» Concern»

Perspective ways of realization of systems of automatic control are considered. The method of construction of management system on the basis of object-oriented databases is offered.

Keywords: an information subsystem, object-oriented model.


CAPACITY OF MIMO FADING CHANNELS. PART 1. RAYLEIGH FADING

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

The paper considers MIMO-systems ergodic (average) capacity algorithms in Rayleigh fading channels. The inter-channel correlation interaction on the average capacity is considered. Upper bound evaluation algorithms for MIMO-systems capacity based on Jensen inequality are shown to be simpler than exact algorithms.

Keywords: MIMO channel capacity; Rayleigh, Ricean, Wishart distribution; distribution of random matrix eigenvalues; Jensen inequality.


RADIO WAVE ATTENUATION RESEARCH IN ATMOSPHERIC AEROSOL

A.A. Kochetkov, specialist, JSC «Sozvezdie» Concern», tel.: 8-919-181-93-45
A.V. Ostankov, doctor of engineering, Voronezh State Engineering University, e-mail: avostankov@mail.ru

The estimation technique of centimetric and shorter radio waves attenuation by one of the aerial formations, aerosol, is considered.

Key words: wavelength, atmospheric aerosol, hydrometeors, conditions of radio wave propagation, attenuation coefficient, complex dielectric constant, frequency range.


FLUCTUATIONS OF TIME DELAYS IN SYSTEMS WITH THE FREE ACCESS

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

Data deference dispersions for ALOHA and IEEE 802.11 protocols are found and analysed. Essential data deference with average values is established.

Key words: wireless networks, LAN, ALOHA, IEEE 802.11 DCF, performance analysis, saturation, throughput, medium access delay.


TO THE QUESTION OF METHODS OF MODELLING OF INFORMATION PROCESSES IN RADIO ENGINEERING SYSTEMS

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

Theoretical conceptions about information processing mechanisms in radio engineering systems with use of methods of difficult dynamics are considered. The analysis of creation possibility of mathematical model of the information process occurring in radio engineering system, on the basis of application of chaos-technologies is carried out.

Key words: dynamic system, associative communications, cellular automatic machines, coupled map lattices, hierarchical structure.


RESULTS ACCURACY ANALYSIS OF OBJECTS STATE COMPLEX MONITORING

A.V. Lenshin, professor, tel.: 8-920-229-09-95
E.T. Dyundikov, senior staff scientist, tel.: 8-960-124-63-30
Military Aviation Engineering University (Voronezh)

The methodical bases of results accuracy analysis of different kinds of objects state complex monitoring are considered. Expressions for definition of erroneous solutions probability are received.

Keywords: dynamic integration process, complex monitoring, accuracy.


OPTIMIZATION OF SIGNAL’S PARAMETERS WITH MULTIWAY MODULATION FOR THE PURPOSE OF CREST FACTOR MINIMIZATION

A.S. Malev, head of department, e-mail: malev75@mail.ru
A.M. Solovyev, head of sector, e-mail: amsolov82@gmail.com
V.D. Shutov, design engineer, e-mail: shuvd@mail.ru
JSC «Sozvezdie» Concern»

The PARP of different manipulation signals was analysed. The method of multiway signal forming for PARP reduction was developed. The influence of power amplifier operating mode on ACPR of different digital signals was investigated.

Key words: crest factor, multiway modulation signal, QAM, APSK, power amplifier, ACPR


FAST AUTOMATIC FREQUENCY TUNING FOR WIDE-BAND VOLTAGE-CONTROLLED OSCILLATORS IN FREQUENCY SYNTHESIZERS

S.K. Romanov, deputy head of Scientific and Technical Center, e-mail: skromanov@rambler.ru
N.M. Tikhomirov, head of Scientific and Technical Center, e-mail: tikhomir@sozvezdie.su
A.I. Lukinova, graduate student, e-mail: lukinovaai@mail.ru
V.N. Tikhomirov, graduate student, e-mail: hugerdead@bk.ru
JSC «Sozvezdie» Concern»

Time definition technique of automatic frequency tuning (AFT) transient period for operating subband in wide-band voltage controlled oscillator used in frequency synthesizers with fractional frequency demultiplier is presented.

Keywords: frequency synthesizer, adaptive frequency tuning, wide band voltage-controlled oscillator, transient period, Simulink-model.


WORKING OUT OF MATHEMATICAL MODEL OF SIGNALS FOR USE IN CHANNELS WITH MULTITRAVELLING DISTRIBUTION

V.D. Lukyanchikov, head of sector, tel.: (473) 225-78-59
N.N. Semenîv, head of department, tel.: (473) 242-13-98
JSC «Sozvezdie» Concern»

Results of mathematical modelling of processes of formation, passage on the shallow sound channel and reception of the signals representing sequences from several narrow-band digital signals with relative phase manipulation which modulate an impulse with linear frequency modulation are resulted. Features of spectral and correlation characteristics of the given kind of signals are investigated.

Keywords: a radio impulse with linear frequency modulation, a digital signal with relative phase manipulation, binary pseudo-casual sequences, frequency deviation, a steepness of the characteristic of modulation, spectral density of amplitudes, correlation function.


INTERMODULATION DISTORTIONS IN WIDEBAND AMPLIFIERS WITH A PARALLEL NEGATIVE FEEDBACK

E.N. Rodionov, head of Scientific and Technical Department, tel.: 89107496764
A.A. Yablonskikh, head of sector, e-mail: sasha_j82@mail.ru
JSC «Sozvezdie» Concern»

Mathematical formulation of nonlinear signal transformation in standard device with parallel negative feedback is obtained taking into account active element limited input resistance and load resistance effect. The experimental check of the received results is carried out.

Keywords: amplifier, negative feedback, transmission gain, conversion conductance, second and third intermodulation.


ON MODEL INTERFERENCE CANCELLER APPLICATION IN GAUSSIAN-MARKOV PROCESS EXTRACTION PROBLEMS IN PRESENCE OF DIFFERENT GAUSSIAN INTERFERENCES

A.E. Manokhin, associate professor, Ural Federal University by B.N. Eltsin, ć-mail: pic_a@mail.ru

The problem of Gaussian-Markov process extraction operating in presence of different Gaussian interferences by dual-channel model interference canceller is solved. Particularly, interferences under consideration are white Gaussian noise, Gaussian-Markov process, narrow-band normal process. The obligatory condition is that the interferences in canceller channels are not intercorrelated.

Key words: modeling interference canceller, forming white noise, optimal filter.


NONLINEAR DISTORTIONS AND INTERMODULATION SELECTIVITY IN ANALOG-DIGITAL HF-PATHS

V.A. Makovy, head of Scientific and Technical Bureau, JSC «Sozvezdie» Concern», e-mail: Makovij@mail.ru

Nonlinearity influence of an analog-digital path (ADP) on harmonic and intermodulation distortion of the input signal when analog-to-digital conversion takes place is considered. Analytical expressions for calculation the basic parameters of nonlinearity and the expression, allowed to estimate achievable level of intermodulation selectivity are received. It is shown, that the provision of intermodulation selectivity reduces ADP dynamic range on signal and blocking without digital nonlinearity correction.

Keywords: software-defined radio (SDR), analog-to-digital converter, dynamic range, digital correction, intermodulation selectivity, digital signal processing, radio communication, voice-frequency channel.


GENERATION OF SIGNALS WITH MULTIMODAL DISTRIBUTION

V.A. Makovy, head of Scientific and Technical Bureau, JSC «Sozvezdie» Concern», e-mail: Makovij@mail.ru

Signals with multimodal distribution of instantaneous values are used in SDR radio stations for the digital correction of analog-digital paths (ADP). Are offered algorithms and wave shapers realizing them with any number of modes of distribution, including intended for realization as general-purpose blocks in the FPGA. Statistical characteristics of the offered generators of signals with multimodal distribution are investigated. Examples of realization of shapers are considered.

Keywords: software-defined radio, SDR, dynamic range, digital correction, multimodal distribution of instantaneous values, digital signal processing, radio communication, random-number generator.


MATERIALS FOR HYDROGEN STORAGE

E.V. Shvedov, professor, Voronezh State Engineering University, e-mail: karl12@yandex.ru
D.B. Omorokov, engineer, JSC « Sozvezdie» Concern», e-mail: saref@list.ru
A.N. Smolyaninov, engineer, JSC « Sozvezdie»Concern», e-mail: alexxx2@bk.ru
K.S. Solovyev, associate professor, Voronezh State Engineering University, tel.: (473) 278-38-86
Yu.N. Shalimov, professor, Voronezh State Engineering University, tel.:(473) 246-76-33
V.N. Sanin, professor, Voronezh State Engineering University, tel.: (473) 246-76-33

A short review of hydrogen storage methods is given. This is the key problem to hydrogen engines successful creation that are characterized by low noise level and can be used for power radioelectronic devices supply. Modern well-known hydrogen storage methods are considered, special attention is paid to metal–hydride systems characteristic based on magnesium and aluminium, that possess high sorption capacity on hydrogen.

Key words: hydrogen storage, power supply, metals hydrides, material structure «modification».


CALCULATION RELIABILITY METHOD OF LAND VHF-RADIOCOMMUNICATIONS

I.V. Sivakov, professor, JSC «Sozvezdije» Concern», e-mail: sir@npo.sozvezdie.ru

The universal common design procedure of the open radio-relay paths, semienclosed and closed radio-relay and relay-tropospheric paths, as well as tropospheric paths with regard of limitations, connected with the use of the even spherical Earth model is given for terrestrial VHF-equipment and communication facility developers. The given procedure will be useful for the conduct of the existent and newly developed equipment comparative evaluation.

Key words: radio-relay communication, tropospheric communication, relay-tropospheric communication, radio-relay and tropospheric link design procedure.


HIGH-EFFICIENCY BROADBAND POWER AMPLIFIER

V.T. Aralov, supervisor of project, e-mail: apolon@sozvezdie.su
A.S. Stroev, head of sector, e-mail: stas1976-76@mail.ru
A.V. Shunulin, head of Scientific and Technical Bureau, e-mail: avs@sozvezdie.su

The article shows that quasi-key mode of operation is one of the most perspective methods for creation high-efficient broadband HF and VHF-power amplifiers. The realization conditions of this mode of operations with the maximum efficiency coefficient are also described.

Key words: power amplifier, efficiency coefficient, cutoff angle, quasi-key mode of operation, transistor utilization factor.