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Summary form only given. This paper presents a method of calculating the information receiving delay in an Intelligent Network (IN). This method is based on an M/M/1 queuing theory model and allows one to calculate the receiving time of different services in an IN. Using the described method, it is possible to build an optimal network structure according to the minimum cost criterion and to any given...
Presents the results of design, testing and trial operation of reporting relay stations (RRS) of 7-40 GHz frequency band intended for TV and radio programme transmission. Characteristic features and performance specifications are given.
The second 16-beam far field pattern has been realized in BSA FIAN radiotelescope at the Pushchino Radio Astronomy Observatory. At present it is possible to perform simultaneous observations of cosmic radio sources for two scientific programs.
The new two-frequency principle of frequency scanning is described. The distinctive feature of the method is the use of the superposition of two waves with different frequencies from two sources located at different points of the waveguide structure. This field superposition is extracted by square-law detectors embedded in radiators. When the frequencies vary, their difference remains constant. As...
The offered mathematical model is researched on the basis of the theory of energization of the longitudinal non-regular waveguide of rectangular cross-section and the efficiency of the TWT-O with an E/sub 11/ operating wave in a double comb slow-wave structure. Variants of such TWT in which an efficiency of more than 70 % is reached are found.
Presents a review of the possible ways of telecommunications development in the present century. The authors consider all kinds of telecommunications including fiber-optical trunk lines and wireless solutions of the "last mile". Special attention is paid to new trends in telecommunications development.
Presents brief technical information and the features of repeater application in cellular networks. Repeaters are commonly used in order to cover the areas with hills or other natural obstacles, impeding signal reception, Repeaters may also be used for "expansion" of the cell borders and enhancement of capacity utilization.
Considers the variants of channel setup within the satellite TV broadcasting network, consisting of central transmitting satellite station (CTSS) and receiving satellite servers (RSS). Set-up of backward channels (from users to CTSS) will make it possible to support dialog services, for example, teletext, storing services, Internet access, etc.
Remote education system (RES) ensures high-quality education in Ukraine, as well as integration of the Ukrainian educational system with the international system. It is one of the most efficient, functionally effective, economically advisable and socially attractive methods. This paper describes the method of quick introduction of remote education system, being a part of measures on crisis elimination.
Presented in this paper are the results of the development of a multisystem transcoder of color TV signals (NTSC, PAL, SECAM), combining a wide range of functionalities and rather low cost. Creation of such transcoder is based on the use of the opportunities of TV signal digital processing. Transcoder flow chart and operating diagram are given.
Given in this paper is the notion of a numerical experiment, its prospects and possibilities as a powerful tool in studies of physics and microwave technology. The requirements for mathematical models and calculation procedures are stated. The author proposes an effective technique of digitization for numerical calculation of differential equations. Propagation of an H/sub 10/ wave in a non-regular...
The paper looks at the software of leading companies in the field of wireless broadband systems development. The basic characteristics of appropriate software and design systems are shown including the most typical examples for their implementation.
In this paper the directional characteristics of scanning short-pulse antennas are considered. The dependence of sector scanning on spatial pulse length and aperture dimension are given.
Considered in this paper is the construction of satellite integrated telecommunication network (SITN) on the basis of ATM-technology and multistation access with real-time redistribution of satellite channel resource. Basic structure of the satellite integrated network based on the Russian "Polycom ATM/TDMA" series, intended for information interchange between regional integrated networks,...
Mutual fluctuations between two carriers in a broadband millimeter-wave communication system may be observed from the heterodyne signal spectrum of the carriers. Laboratory measurements made on equipment developed for local multipoint distribution system (LMDS) applications indicated the degradation in the heterodyne spectrum was mainly in the form of increased background noise with L(f) close to...
The authors have found Laplace-Stiltiece transformation for the time of message delivery to the receiver, as well as its response in the form of appropriate controlling frames. We have obtained the expression for estimation of optimal mean value of scanning period. Boundary conditions of scanning period have been laid down for several routing methods.
Substantiates the choice of architecture of information-analytical system for networks and radio-line simulation. Two-tier architecture, which is commonly used for design of corporate information systems, does not cope with the tasks of automatic calculations of EM compatibility, coverage zones, path profiles, etc. Multi-tier architecture can be an alternative.
Summary form only given. The present paper concerns the estimation of the cost of transmitting one kbps of information between two serviced intensifying or regeneration points (SIP or SRP). Different methods of signal multiplexing are taken into consideration.
Summary form only given. The paper deals with the problems of network productivity management. Some particular reasons for insufficient efficiency of a network are analysed. A conclusion is made that certain additional measures are required in order to support high efficiency of a network.
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