O.I. Atakishchev, A.A. Zhuk, I.S. Zakharov, and T.A. Mirtalibov
Metagrammars Application in Formal Structural-Linguistic Description of Alternate Designs and in Layout Programming of Extensible Telecommunication Networks
Part 1. Attribute Metagrammars. Basic Concepts and Definitions
The authors suggest applying the apparatus of the attributive ordinary and graph metagrammars theory for formal structural-linguistic description of alternate designs and in layout programming of extensible telecommunication networks.
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O.I. Atakishchev, A.A. Zhuk, I.S. Zakharov, B.V. Klyukov, and T.A. Mirtalibov
Specific Cases of Attributive Metagrammars Application in Formal Structural-Linguistic Description of Alternate Designs and in Layout Programming of Extensible Telecommunication Networks
Part 2. Formal Properties of Attributive Grammars. Application of Attributive Metagrammars in Formal Structural-Linguistic Description of Alternate Designs of Telecommunication Networks with Extensible Architecture
In this part we will consider formal properties and particular application cases of the suggested subclasses of attributive grammars for structural-parametric description of alternate designs and layout programming for telecommunication networks with extensible architecture.
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A.Kh. Sultanov, I.A. Sharifgaliev, and I.L. Vinogradova
A Statistical Approach to Mathematical Simulation of Synchronizing Signal Errors in Synchronous Telecommunication Systems
The synchronizing signal property with data being transmitted through synchronous telecommunication (TC) systems is shown to be of certain significance. An influence of errors introduced by the operations of synchronous group-forming algorithm upon the quality of a synchrosignal is considered and mathematical expressions describing this quality are derived. It is suggested that mathematical simulation of the effect the locking signal property has upon the decision-making process should be carried out using the magnitude of temporal mismatch. For the case of rare slips in the transmission system a number of mathematical relations is derived, which specify the probability of bit errors for both types of receiving devices. A problem on formalization and mathematical description of the synchronous group-forming algorithm is stated.
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Yu.E. Didyuk, V.S. Lutikov, O.Yu. Makarov, and E.A. Rogozin
On Evaluation of Information Vulnerability in the Requirements to Information Protection Facilities in Automated Systems
In accordance with Guided Documents of State Technical Commission of the Russian Federation, based on a system approach, problems are developed of information protection in automated systems. Factors are suggested for evaluating of effectiveness of information protection aids against various kinds of menaces.
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V.I. Zhuravlev, O.V. Nazarov, and Yu.L. Savvateev
Synthesis of a Quasioptimal Receiver of MFSK Signal against a Background of FM Interference and Gaussian Noise for a Double-Channel Observation. The General Case and Case of a Perfect Reference Channel
We have concretized quasioptimal (in Gaussian approximation) algorithms of filtering of continuous accompanying parameters and decision rule of the discrete information parameter dedication for the signal with Ì-positional frequency-shift keying (MFSK). The signal is received against a background of frequency-modulated (FM) interference and Gaussian noise. In contrast to [1], the case of double-channel observation has been considered.
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Ya.E. Lvovich, A.S. Dubrovin, N.N. Zyuzina, O.Yu. Makarov, E.A. Rogozin, and V.I. Sumin
Quality Index System for Operating of Information Security Software in Computer-Aided Control and Communication Networks
System of quality indices of operating of an information security software system is proposed. It has made in interests of design of methodological basics of administrative-technological control over processes of information security in computer-aided systems of control of critical applications on the basis of software tools of information security.
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E.I. Balunin and V.L. Tamp
Detection of Presence of Block Coding in Digital Flow
The techniques for detection of block coding in digital flow of the communication channel on the basis of estimations of possible options for even parity check at a priori ambiguity with respect to the type and parameters of noise combating block code is suggested. The obtained results can be applied in the present-day means electronic support measures.
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M.V. Garanin and I.A. Shalimov
Digital Demodulation of Multiple Frequency-Shift Keying Signals
Results of investigations of digital demodulation for multiple frequency-shift keying signals are presented in this paper. Synchronization and signal registration of digital communication are considered.
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B.S. Timofeev and N.A. Obukhova
St. Petersburg State University of Aerospace Equipment Engineering
Systems for Video Detection and Tracking of Mobile Objects
Main techniques are considered for optimization of video camera operation and preliminary processing of images of mobile objects obtained under complicated conditions of video surveillance as well as the method of image synthesis of contrast objects. The results of morphological filtering application for improving the signal-to-noise ratio and obtaining contour preparations of objects are presented. The attributes allowing segmentation of objects at the complicated background, are provided. The methods of considering the motion of objects - optical flow and motion energy - are described. The algorithm for automatic defining of the motion detection threshold is suggested. The classification and comparison analysis of methods for tracking of mobile objects are given. The drawbacks of the methods based on correlation and motion energy are considered. The algorithm is suggested and the advantages of the method based on segmentation of objects into the motion layers are demonstrated.
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A.P. Preobrazhenskij
Estimation of Possibilities of Combined Procedure for Calculation of Scattering Cross Section of Two-Dimensional Perfectly Conductive Cavities
On the basis of a two-dimensional model we have estimated the possibilities of usage of the combination of the modal method, physical optics method, and edge wave method for calculation of scattering cross section (SCS) for cavities having a homogeneous cross-section. The solution obtained on the basis of these methods has been compared with the solution obtained on the basis of strong integral equations method. We have determined the requirements for cavity dimensions for which the calculation of cavity SCS is possible on the basis of the mentioned combination of the methods.
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