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SCIENTIFIC WORK

SCIENTIFIC AND TECHNICAL JOURNAL «RADIO COMMUNICATION THEORY AND EQUIPMENT» ISSUE 4, 2010

MODELS STOCHASTIC SUPERBROADBAND SIGNALS

I.V. Linnik, head of laboratory, tel.: 8-910-344-27-00
A.A. Okrachkov, deputy head of department tel.: 8-905-049-12-55
P.A. Trifonov, senior research engineer, tel.: 8-951-545-61-69
D.V. Khripushin, head of department, tel.: 8-910-342-99-10
Federal State Research and Development Test Centre of Electronic Warfare and Perceptibility Decrease Efficiency Evaluation
O.V. Afanasyev, head of department, JSC «Sozvezdie» Concern», tel.: 8-903-855-07-62

The strict classification of stochastic superbroadband signals including superbroadband video signals and superbroadband radio signals is offered. Some classes of sequences of stochastic superbroadband signals are considered.

Key words: stochastic superbroadband signals, video signals, radio signals, signal spectrum, modulating function.


THE AUTOCORRELATION FUNCTION AND SPECTRUM MODIFIED PHASE MANIPULATED SIGNAL

G.S. Nakhmanson, leading research engineer, Voronezh Military Aviation Engineering University, tel.: (4732) 26-44-83
I.N. Masnev, design engineer, JSC «Sozvezdie «Concern», e-mail: Ivashka_m@mail.ru

The correlation function and spectrum phase manipulated (PM) signal with a phase modulated Barker code with a base of seven with a smooth change in phase by 180° on an eventual temporal interval are considered. It is shown that the smooth change of phase practically does not influence the conduct of autocorrelation function (ACF) of PM and leads to a redistribution of the levels of sidelobes of the spectral density.

Key words: phase-shift keyed signal, autocorrelation function (ACF), spectral density, sidelobe.


COMPUTER MODELLING OF A ZONE OF INFLUENCE OF A GROUPING OF RADIO-ELECTRONIC MEANS

A.D. Korobova, associate professor, Voronezh State University, tel.: (4732) 52-79-25
E.A. Khromykh, leading research engineer, JSC «Sozvezdie» Concern», tel.: (4732) 52-08-33

New ways of the zone influence analysis in groupings of the radio-electronic means are offered and the technique, that allows taking into account their joint action on the receiver, carrying out an estimation of electromagnetic conditions parameters for crossed TEMS and the modified TRAP is considered. Examples of application of a technique are given, calculation of an ecological zone for two radio-electronic means with circular and non-circular diagrams of orientations of aerials in particular are given.

Key words: modelling of electromagnetic conditions, a grouping of radio-electronic means, zones of influence, ecology, MathCAD.


DETECTION OF THE DISGUISED OBJECTS AT PRESENCE IN STRUCTURE OF A MEANS OF INVESTIGATION TIME FRIQUSE LASERS RADIATION RESEARCH

A.N. Glushkov, head of sector, JSC «Sozvezdie «Concern», tel.: 8-915-582-58-05
V.G. Kerkov, head of direction, Federal State Research and Development Test Centre of Electronic Warfare and Per-ceptibility Decrease Efficiency Evaluation, tel.: (4732) 36-43-59
A.L. Mitrofanov, senior research engineer, JSC «Sozvezdie «Concern», tel.: (4732) 23-31-92
G.L. Tyurin, deputy head of department, Federal State Research and Development Test Centre of Electronic Warfare and Perceptibility Decrease Efficiency Evaluation, tel.: (4732) 36-43-59

The characteristics of detection of the disguised objects exposed to laser radiation are received and discussed.

Key words: laser hardware, object, underlying surface.


EFFICIENCY OF GARMONICS OR GAUSSIAN INTERFERENCE IMPACT ON THE MULTICHANNEL RADIO COMMUNICATION LINE WITH SYNCHRONOUS CODE-DIVISION MULTIPLEXING AND LINEAR CHANNEL SEPARATION

A.E. Kondratenko, principal engineer of the project, tel.: 8-920-403-21-74
V.N. Poddubny, principal research engineer, tel.: (4732) 36-71-13
Federal State Research and Development Test Centre of Electronic Warfare and Perceptibility Decrease Efficiency Evaluation

The efficiency of joint and several harmonics and Gaussian interference impact on the multichannel radio communication line with synchronous code-division multiplexing and linear channel separation on the base of detecting and analyzing the binary element distortion probability at the receiver decoder input and output on each channel of the multichannel radio communication line is investigated.

Key words: multichannel radio communication line, synchronous linear channel code-division multiplexing, binary element distortion probability, harmonics and Gaussian interference.


CRYPTOGRAPHIC SYSTEM IN POLYNOMIAL CLASS DEDUCTION FOR CHANNEL WITH NOISE AND IMITATING VIOLATOR

D.V. Samoylenko, adjunct, e-mail: sam-0019@yandex.ru
O.A. Finko, professor, e-mail: ofinko@yandex.ru
Krasnodar High Military School (VI)

Antinoise modular cryptographic system, functioning in polynomial class deduction is discussed. The algorithm of the expansion of the system of the bases of the cryptographic system is offered. The estimation to offered noise-immunity cryptographic system as referred to the traditional one is presented.

Key words: Chinese remainder theorem, cryptanalyst, cryptography, cryptosystem, modular arithmetic, polynomial residues, Galois fields, antinoise coding.


ANALYSIS OF GSM STANDARD-MOBILE RADIO COMMUNICATION NETWORK OPERATING EFFICIENCY BY MEANS OF SIMULATION MODELLING

A.P. Vashchenko, senior officer, Military Forces General Staff, e-mail: vap642805@mail.ru

Basing on the simulation of a mobile radio communication network, the results of its functioning process analysis and the quality of service main characteristics are given.

Key words: cellular communication, quality of service, average losses, cluster, signal to noise ratio, employment of channels, load of a cell.


SPECTRAL METHOD OF THE ANALYSIS AND SYNTHESIS OF DIGITAL NONLINEAR ELEMENTS

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

Features of manifestation of the nonlinearity of the amplitude response in the analog-digital path (ADP) are considered. The method of the analysis of non-linearity of an analog-digital path with sinusoidal measuring signal is offered. The calculated ratios for analytical description of the nonlinear element based on transformation of a test signal are received. Methods of synthesis of the correcting nonlinear elements are resulted, allowing by digital signal postprocessing to improve the linearity of the ADP.

Key words: interpolation, inertialess nonlinear element, Chebyshev polynomials, Fourier coefficients, analog-digital path, analog-digital converter, correcting nonlinear element, digital correction.


DIGITAL CORRECTION OF THE FREQUENCY SCALE SOFTWARE-DEFINED RADIO RECEIVER

V.A. Makovy, head of Scientific and Technical Department, e-mail: Makovij@mail.ru
S.A. Shkurov, head of sector, e-mail: sshkurov@mail.ru
JSC «Sozvezdie «Concern»

Methods of errors correction of the frequency scale digital software-defined radio receiver based on receiving an external signal with known frequency are considered. The offered method of deformation of the frequency scale of radio receiver allows applying in software-defined radio equipment reference generator circuits without fine adjustment of frequency.

Key words: digital correction, radio receiver, digital signal processing, discrete Fourier transform, sampling, Kotelnikov theorem, quartz oscillator.


ON THE ISSUE OF HIGH-SPEED LASER COMMUNICATION LINE INTEGRATION IN BROADBAND RADIO ACCESS SYSTEMS AND COMPLEXES

S.V. Artyshchenko, senior research engineer, JSC «Sozvezdie» Concern», e-mail: artichenko@mail.ru
S.Yu. Sizov, head of department, JSC «Sozvezdie» Concern», tel.: (4732) 52-22-94
A.V. Volodko, associate professor, Voronezh State Engineering University, e-mail: zavlabvgtu@rambler.ru
O.V. Nikolaev, head of Scientific and Technical Centre, JSC «Sozvezdie» Concern», tel.: (4732) 52-79-41

The possibility of including high-speed (quickly transferring) laser communication lines with possibility of radiation source operating frequency tuning in systems and complexes of a broadband radio access is discussed. It gives the possibility to duplicate the equipment of millimetric range and dynamically adapt to changing environment. One of the advantages in using such lines is the increase of system operability at the expense of window region operative search in case of absorbing impurity deliberate dispersion in atmosphere.

Keywords: laser communication, absorption, window region, frequency tuning.


NON-POSITIONAL DIGITAL FILTER STRUCTURE AND FUNCTIONING ALGORITHM OPTIMIZATION

A.V. Veligosha, associate professor, Stavropol Military Communication Institute of Rocket Forces, e-mail: tomvell@mail.ru

A new method for organizing calculations for digital filters operating on the base of modular information coding is offered. The essence of the offered method is that output sampling calculation in the non-positional filter is realized on a single base. Applying the said method makes it possible to optimize the digital filter structure and output sampling calculation algorithm while maintaining the high rate and accuracy in calculations.

Key words: digital filter, system of residual classes, remainder with respect to the base N , modulus, representation range, tabular arithmetic device, data converter.


IMPULSE DUAL-LOOP AUTOMATIC FREQUENCY CONTROL SYSTEM

S.V. Tereshchenko, graduate, MIREA, e-mail: stassya_t@mail.ru

The dynamic processes of impulse dual-loop automatic frequency control system are researched. The algorithm defining mathematical simulation and the calculation results of MathCAD program for three dynamic modes are considered.

Key words: frequency control, dual-loop system, impulse source, frequency stability, mathematical simulation.


DISTURBANCES IN THE SYNTHESIZER WITH FRACTIONAL DIVIDERS CONTROLLED BY DELTA-SIGMA MODULATORS

S.K. Romanov, deputy head of Scientific and Technical Centre, e-mail: skromanov@rambler.ru
N.M. Tikhomirov, head of Scientific and Technical Centre, e-mail: tikhomir@sozvezdie.su
D.N. Rakhmanin, head of department, e-mail: rax_d@mail.ru
JSC «Sozvezdie» Concern»

Comparison of the levels of the fraction disturbances which are generated by the phase locked loop system with fractional dividers where five types of the third order delta-sigma modulators is used has passed. Systems of the differ-ence equations which are describing this modulators behavior are presented. Models of the considered types of the delta-sigma modulators and the phase locked loop system in subsystem Simulink of the MATLAB system are offered.

Key words: frequency synthesizer, phase locked loop, fractional divider, divisibility disturbances, delta-sigma modulator, accumulating summer, quantizer, charge pump.


INTERMODULATION DISTURBANCES IN PHASE LOCKED LOOP SYSTEMS WITH FRACTIONAL DIVIDERS

S.K. Romanov, deputy head of Scientific and Technical Centre, e-mail: skromanov@rambler.ru
N.M. Tikhomirov, head of Scientific and Technical Centre, e-mail: tikhomir@sozvezdie.su
D.N. Rakhmanin, head of department, e-mail: rax_d@mail.ru
JSC «Sozvezdie» Concern»

Rank of the level of the disturbances which are generated by the phase lock loop system with fractional divider is given. Variants of the calculation such disturbances in the MATLAB are shown.

Key words: frequency synthesizer, phase locked loop, delta-sigma modulator, transitive process, parasitic bond line, divisibility disturbances, frequency-phase detector, charge pump.


DIGITAL CORRECTION OF ANALOG-DIGITAL WEAVER DEMODULATOR

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

The influence of analogue-digital path parameter deviation on attainable selectivity of image receive chain is analyzed. The calculated ratios with preset selectivity value for calculation of the maximum allowable parameter deviations are received. The features of different digital correction methods that contribute to the improvement of demodulator parameters due to additional digital signal processing implementation, are considered.

Key words: digital correction, selectivity, simulation, quadrature demodulator, Weaver demodulator, dynamic range, software-defined radio, digital signal processing.