CHARACTERISTICS OF MATHEMATICAL SOFTWARE RADIO COMMUNICATION
T.V. Glotova, H.I.Besher
This paper discusses the features of the methods used to assess the propagation characteristics of radio waves in modern radio systems. Parameters affecting the accuracy and the computation time of radio signal propagation in certain areas. It is noted, as a preliminary evaluation of the characteristics as there is a large error in calculations, the use of statistical approaches. More acceptable from the point of view of practical use give radiation methods, different variants of which is given. It is noted the feasibility of a combination of several methods, such as adding to the main model approaches based on artificial intelligence.
Keywords: radio communications, wave propagation, mathematical software, method, design.
THE SIMULATION OF SCATTERING CHARACTERISTICS OF OBJECTS HAVING EDGES
A. P. Preobrazhensky
In the paper the problems of scattering of radio waves on the objects, which include edge are considered. First, the analysis of the simplest edges, which is a wedge-shaped structure having a certain angle of solution is given. For the general case the edge of such structures may be truncated. The calculations of the scattering parameters was based on the method of integral equations in the framework of the Kirchhoff approximation. The examples of calculations of scattering characteristics are given, and built the radio image. Further the models of hollow structures is considered. The edges of these hollow structures can be defined by different edges. The calculations of the scattering parameters was based on the method of integral equations. The examples of calculations of scattering characteristics of hollow structures, and built the radio image of the edge part of the hollow structure.
Keywords: simulation, communication, diffraction, wave propagation, design, edge, hollow structure.
THE ANALYSIS OF APPROXIMATE MODELS FOR ESTIMATING THE AVERAGE CHARACTERISTICS OF THE SCATTERING DIFFRACTIVE STRUCTURE
A. G. Yurochkin, A.V.Danilova, I.A.Gusarova
This paper analyses the possibilities of how to apply the approximate model in order to assess the average characteristics of the scattering object. The exact approach is based on the method of integral equations, and an approximate model based on the combination of the method of edge waves and the physical optics approximation. The object is represented in the form of separate components. It is shown how the defined sector angles, given the framework of specific errors. Based on how aggregated information on the elements of an object given suggestions on how to build a subsystem of CAD in order to design the average characteristics of the objects. As a test data for the subsystem are selected dimensions of the elements and sector angles, the required levels for the average characteristics of the scattering.
Keywords: communication, diffraction, wave propagation, design, CAD, diffraction structure.
THE APPLICATION OF OPTIMIZATION METHODS FOR THE DESIGN OF
ABSORBERS OF ELECTROMAGNETIC WAVES
The paper deals with the use of multi-objective optimization particle swarm optimization for designing of planar multilayered electromagnetic absorbers in the determination of Pareto-optimal solution. During optimal solution presents we determined the compromises between the thickness and reflection coefficient of the absorbers. The developed algorithm for synthesis of absorbing material is simple and quite fast.
Keywords: optimization, modeling, absorbent material, design, electromagnetic wave.
THE PROPOSALS FOR THE DEVELOPMENT OF SUBSYSTEMS OF ANALYSIS AND SYNTHESIS OF THE ELEMENTS OF RADIOCOMMUNICATION SYSTEMS
A.A.Golovin, Y.A.Mishin, E.S.Zatsepin
In the paper the suggestions are given for the structure of subsystems that can be used for designing elements of radiocommunication systems. As a basis of mathematical support subsystems appropriate methods are shown.
Keywords: system of radio communication, design, methodology, CAD.
THE DESIGN OF INFORMATION COMPUTER NETWORK OF THE ENTERPRISE LLC “LISKO-BROILER”
In the paper the features of network design and production enterprise are considered. The brief description of the production units is given. The choice of network topology is justified. The layout of the network equipment is shown.
Keywords: :computer network, design, information, enterprise.
THE PROBLEMS OF ESTIMATION THE AVERAGE SCATTERING CHARACTERISTICS OF ELECTROMAGNETIC WAVES
In this paper we consider some problems that arise in the evaluation of secondary scattering characteristics of electromagnetic waves. The basic methods for the estimation of the scattering parameters are pointed out. The structure of the subsystem for the design of objects with given average characteristics of the scattering is given.
Keywords: : scattering of electromagnetic waves, design, method, object.