Application of Federal Act «On measuring unity enforcement» in telecommunications and mass media sector
ALEKSEYEV E.B., BUBUK G.A., ZHELNOV V.A., NASONOV A.Yu.
Key words: telecommunication networks, measuring unity, information social, metrology service, measuring means.
Broadband HF radio transmitters for digital communication lines
KILDISHEVA O.E., LUNIEV S. F, LEPPA B.L., ALEXANDROV A.G.
The Komintern research and production merger company (Saint-Petersburg), now «Russian Institute for Power Radiobuilding» Joint-Stock Company («RIPR» JSC), will celebrate its centennial in November 2011. The traditional orientation of the company’s work is the power radio engineering: development, production management and series production of higher-power radio transmitters, antenna-feeder devices and control systems for them, incl. and mainly for law enforcement authorities.
Key words: item, transmitter, digital links, law enforcement authorities.
Remote management and supervision of an air navigation system’s facility
GILKINA S.L., GRISHUKOV A.A., DENISOVA E.Yu.
In this article we consideration the necessity of creation of universal system of the remote control and monitoring with Russian OS МСВС 3.0 and allowing floppy to configurate connection of various types and amounts of interfaces of radio and additional systems. The offered version of the unified, floppy, configurated system of the remote control and monitoring, supportinga wide set of the external interfaces, created on the basis of an available experience of the previous developments of experts of Open Company «AVIATECHSOFT «and wishes of users, can be applied not only at the automated radiocentres, but also to the control and monitoring of the other equipment.
Modern domestic aviation equipment for automatic data exchange
KOMYAKOV A.V., VDOVIN L.M., KONDINA I.V., KULAKOV D.S.
The issues on development of aviation communication complexes are considered. The basic set of telecommunication equipment produced by NPP «Polyot» is presented.
Key words: aeronautical telecommunications, Air Traffic Management, communication equipment, basic set, «AUTsS-Brik».
Quadrature-amplitude modulation digital communication channels' capacity
The numerical method of an estimation of capacity of digital communication channels with Quadrature Amplitude Modulation and its realization example is given. Asymptotic dependence of the capacity and the optimal number positions of a channel with the square signal constellation on the signal/noise ratio are determined. Comparison of last dependence with Shannon’s formula is also discussed.
Randomized digital teletraffic models
A class of digital teletraffic models derived from classical queuing systems by randomization of their parameters is considered. It is noted that randomized models created in such a way take into account main features of self-similar processes (event grouping, long-tailed distribution etc). Examples of randomized models and numerical results illustrating their characteristics are presented.
Key words: teletraffic, theory of queues, self-similar process, stochastic process, randomized model, buffer, queue, failure.
Method of evaluating digital communication channels' quality while transferring analog data of aviation radio-wave imaging systems
SUKHORUKOV A.I., KHISMATOV I.F.
In article there is offer the method of definition of quality transmission on the digital communication channel with interfering analog radio-locating information, which consider the description carrying capacity and the theory ε-entropy. The method is taking of the total statistic interface with communication channel. This method is applicable in cases, when numerical signals are independents and equally probable, at the same time binary code is uniform.
Key words: communications channel, ε-entropy, carrier capacity, binary code, analog information, radio-wave imaging, probability of error, radar station.
Study of film resistors' thermal behavior
ABDENOV A.J., RUBANOVICH M.G., KHRUSTALEV V.A.
In this work the discrete design procedure of stationary temperature fields is developed. Principles are put on a basis of digitization mathematical «a method of straight lines», used for the numerical calculation of the differential equations in partial derivatives. This approach assumes an independence of variables values within the limits of the block on coordinates X, Y and a continuity of a variable on coordinate Z. The temperature is determined as result of piecewise-linear approximation between central points for which values of temperatures is analytically determined. The offered technique is distinguished with simplicity and compatibility with existing standard computer packages. Significant computing resources are not required.
An automated control and management system based on Lon Works technology