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SCIENTIFIC WORK

SCIENTIFIC AND TECHNICAL JOURNAL «RADIO COMMUNICATION THEORY AND EQUIPMENT» ISSUE 4, 2009

QUALITY INDEX ANALYSIS FOR MULTI-ALTERNATIVE SIGNAL DETECTION UNDER NONCOHERENT HANDLING AND FLUCTUATIONS OF THEIR AMPLITUDE ACCORDING TO RAYLEIGH-RICE LAW

V.M. Zinchuk, head of department, tel.: (4732) 52-58-22
N.M. Radko, deputy general director of science, tel.: (4732) 52-25-60
T.F. Kapayeva, leading engineer, tel.: (4732) 52-58-22
A.E. Limarev, head of sector, tel.: (4732) 52-58-22
Yu.N. Maksyuta, engineer, tel.: (4732) 52-58-22
JSC “Concern “Sozvezdie”

The quality index analysis for multi-alternative signal detection under noncoherent handling and their amplitude fluctuations according to Rayleigh–Rice law is conducted. The generalized algorithm of multi-alternative noncoherent detection and distinction of minimum undetection probability criterion with probability limitation on false distinction and false alarm is presented. Analytical expressions for calculation of quality index algorithm when there are fluctuations of signal amplitude according to Rayleigh–Rice law with different values of fading depth are given. The results of numerical calculations are presented as graphical dependencies.

Key words: noncoherent reception, slow and fast fadings, amplitude distinction according to Rayleigh–Rice law, false distinction probability, false alarm probability.


PERMUTATION MODULATION CHANNEL SYMBOL NUMBERING

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

Permutation modulation symbol numbering and denumbering system construction method providing minimal computational complexity is described. In this case numbering system generating proposed method computational complexity is independent of selected numbering procedure.

Key words: permutation modulation, channel symbol alphabet, combination numbering.


INTERFERENCE IMMUNITY OF ITERATIVE RECEPTION ALGORITHMS IN MULTIPATH CHANNELS WITH PARAMETERS NOT PRECISELY DEFINED

Yu.B. Nechayev, principal research engineer, e-mail: nechaev@cs.vsu.ru
A.A. Malyutin, head of Scientific and Technical Department, e-mail: malyutin@nm.ru
P.N. Radko, engineer, tel.: (4732) 52-25-60
JSC “Concern “Sozvezdie”

The estimation precision impact of impulse response and multipath channel noise-power ratio on interference immunity of sequential modems with iterative processing of received signal is researched. It is supposed that channel characteristics are defined precisely.

Key words: iterative algorithms, multipath channel, sequential modem, linear equalizer.


CALCULATION OF PROBABILISTIC-TIME CHARACTERISTICS OF NARROW-BAND RADIO NETWORKS WITH MESH TOPOLOGY FOR DIFFERENT FREQUENCY RANGES*

Yu.B. Nechayev, principal research engineer, e-mail: nechaev@cs.vsu.ru
S.I. Grigoryev, head of department, tel.: (4732) 70-23-72
A.A. Epifantsev, engineer, tel.: (4732) 21-35-99
M.Yu. Sidorov, engineer, tel.: (4732) 70-38-67
JSC “Concern “Sozvezdie”

The estimation variant of probabilistic-time characteristics of a narrow-band radio network with mesh topology is described. Extreme network characteristics calculation in various frequency ranges is made. There are diagrams that show communication system service intensity dependency on entrance stream of demands intensity.

Key words: mesh topology, narrow-band networks, service intensity.


ŃHORST INDEX DEFINITION FOR RANDOM PROCESSES BY «FANO» FACTOR COMPUTATION

D.A. Veligosha, graduate, North and Caucasian State Engineering University, ĺ-mail: tomvell@mail.ru

The method which allows estimation of traffic fractal characteristics based on «Fano» factor computation is presented.

Key words: fractal characteristics, Fano factor, Ch?rst index, Lipschitz exponent, H?lder exponent.


ADAPTIVE BROADBAND SIGNAL RECEPTION ALGORITHM UNDER COMPLEX INTERFERENCE CONDITION

S.V. Dmitriev, research engineer, Scientific and Researching Centre, e-mail: dsv.orel@mail.ru
A.Yu. Savinkov, deputy director of Scientific Production Complex, JSC “Concern “Sozvezdie”, e-mail: a.savinkov@mail.ru

Narrow-band interference jamming method in CDMA communication system at the expense of the frequency and spatial selection sharing is considered. Opposing to the common techniques, in the proposed one an adaptive frequency-dividing channeling of the receiving signal spectrum is used, so that number of the frequency channels and a frequency band of each one match the interference condition. Computationally efficient forming weight ratios algorithm of adaptive antenna array linear summator is offered. Simulation results are provided.

Key words: adaptive array, adaptive linear summator, fast Fourier transform, spectrum, frequency channel, code division multiple access.


ANTENNA ARRAYS WITH SUPERRESOLUTION IN BEAM SPACE FORMED BY FROST METHOD

Yu.B. Nechayev, principal research engineer, e-mail: nechaev@cs.vsu.ru
E.S. Makarov, research engineer, e-mail: makarov_es@mail.ru
S.V. Ionov, deputy head of Scientific Production Association, tel.: vnn-61@mail.ru
JSC “Concern “Sozvezdie”

Two-step modification for direction-finding super resolving algorithms based on subarray beam preshaping following the linear-bounded processing method with minimal dispersion is proposed. The proposed algorithm advantage in the part of resolution capacity and arrival angle biased estimate is shown.

Key words: antenna arrays, angular superresolution.


LASER SYSTEM MATHEMATICAL MODEL OF THE REMOTE ACOUSTIC INFORMATION ACQUISITION FROM DIELECTRIC SURFACES

A.A. Reshetnyak, design engineer, tel.: 8-960-113-46-93N.S. Rogatnev, design engineer, e-mail: nck:tpost@rambler.ru
JSC “Concern “Sozvezdie”

A mathematical model of the acoustic information acquisition from the dielectric surfaces system on basis of energy reception of reflected signal in optical range is considered.

Key words: remote information acquisition, information security, optical signal reflection, vibroacoustic channel.


SYSTEM EFFICIENCY IMPROVEMENT IN BURST INTERFERENCE SUPPRESSION

V.I. Parfyonov, professor, Voronezh State University, tel.: (4732) 55-29-95
T.S. Uzhakhova, acting head of sector, JSC “Concern “Sozvezdie”, tel.: (4732) 55-29-95

A new facility of the burst interference compensation, allowing improvement in interference immunity, in case of liability to burst interference, while redetection and post detection processing is proposed, and its comparison to basic currently used prototypes is provided.

Key words: external interference protection, burst interference, «broadband filter–limiter–narrowband filter» system, amplitude limiter, modified amplitude limiter, burst interference compensation.


METHODOLOGY OF THE COMPLEXIFIED SECONDARY PROCESSING ALGORITHM IN THE AUTONOMOUS SEGMENT AND THE AUTONOMOUS NAVIGATION SYSTEMS COMPLEXIFICATION REALIZATION

A.A. Krutskikh, design engineer, e-mail: a@krut.su
Yu.B. Milyavsky, head of department, tel: 8-906-588-52-18
G.B. Volobuyev, deputy head of Scientific and Technical Department, tel.: (4732) 52-08-33
JSC “Concern “Sozvezdie”

Efficient determined algorithm for azimuth computation in the autonomous complexified navigation systems is described. Measurement technology for magnetic course azimuth, subject to magnetic field deviation, magnetic variation and declination, and also for geographical course azimuth of the angular velocity sensor axes is considered.

Key words: autonomous navigation systems complexification, determined algorithm, magnetic azimuth measurement, geographical azimuth measurement.


APPLICATION OF PPLLFC SYSTEM ALIGNMENT METHODS AND LFF ELEMENT SWITCHING FOR FREQUENCY SYNTHESIZERS SPEED AUGMENTATION

S.K. Romanov, deputy head of Scientific and Technical Center, JSC “Concern “Sozvezdie”, e-mail: skromanov@rambler.ru
N.M. Tikhomirov, head of Scientific and Technical Center, JSC “Concern “Sozvezdie”, e-mail: tikhomir@sozvezdie.su
D.N. Rakhmanin, head of department, JSC “Concern “Sozvezdie”, e-mail: rax_d@mail.ru
V.I. Shtephan, general director, JSC «Voronezh Research Institute on Communications «Vega», tel.: (4732) 46-35-44

Frequency-phase detector pumping current control and LFF element searching algorithm aimed at decreasing of time for frequency and phase settling in frequency synthesizers with system of pulse-phase-locked-loop control is offered. Analytic forms for determining of transient processes duration while changing the frequency in synthesizers are found. Design results from these forms were compared to simulation results of the synthesizer transient processes. These processes are based on 5-th order PPLFC system with visual simulation medium SIMULINK and mathematical actuation system MatLab.

Key words: frequency synthesizer, pulse-phase-locked-loop control system, transient process, frequency-phase detector, charge pumping.


INTERVAL NUMBER APPLICATION FOR ERROR DETECTION AND ERROR CORRECTION IN NONPOSITIONAL DIGITAL FILTERS

A.V. Veligosha, associate professor, Stavropol Military Communication Institute of Rocket Forces, e-mail: tomvell@mail.ru
D.A. Veligosha, graduate, North and Caucasian State Engineering University, e-mail: tomvell@mail.ru

Nonpositional arithmetic application advantages for digital filters design and interval number application for error detection and error correction computation are presented. The interval number presented in nonpositional arithmetic is more effective for computation error elimination and for high reliability output computation and digital filters fault tolerance providing. A new method for error detection and error correction in digital filters computing devices is presented.

Key words: radix system, interval number, working and control radices, digital filters, nonpositional arithmetic, computation errors.


OPTIMIZATION AND ANALYSIS OF NUMEROUS HYPOTHESES TESTING SUBSEQUENT PROCEDURE AT NONLINEAR SYSTEM OVERHEAD FOR DATA ACQUISITION

S.A. Zhitenyov, design engineer, tel.: (4732) 79-25-32
S.A. Zmayeva, design engineer, tel.: 8-908-136-17-66
JSC “Concern “Sozvezdie”

Investigation results of numerous hypotheses testing subsequent procedure aimed at approximation formulas validating to estimate mean time for finding solution to automatic situation problems recognition are presented. This solution is potentially reachable by means of structure and data acquisition facilities optimization. These investigation results can be used in other applications.

Key words: sequential procedure optimization, sequential procedure average duration.


NANOCRYSTALLINE PATTERN FORMATION IN THE COURSE OF Al87Ni10Nd3 AMORPHOUS FILM PHOTONIC ANNEALING

D.B. Omorokov, engineer, JSC “Concern “Sozvezdie”, e-mail: saref@list.ru
S.A. Pokazanyeva, engineer, Voronezh State Engineering University, e-mail: westlinex@mail.ru
E.V. Shvedov, professor, Voronezh State Engineering University, e-mail: karl12@yandex.ru

Kinetics of nanocrystalline pattern formation in Al87Ni10Nd3 amorphous metal film in the course of photonic annealing is investigated. The Al crystal size at different radiation energy coming to the sample is determined. The film heating temperature is estimated in compliance with the classical laws of thermal radiation, the character of variation in Ni and Nd atom concentration is determined when removing the crystal nucleus. The value of these atoms diffusion path at various film temperatures is determined. The comparison of experimental and theoretical nanocrystal size resulted in the conclusion on local heating in the area of crystallization which can be concerned with bulk and surface plasmon resonance.

Key words: pulse photon processing, amorphous matrix, nanocrystalline structure, diffusion path, grain size, heat energy accumulation, plasma resonance.