To provide reasonable identification of the states of the process of functioning of the synchronization system in communication networks for making rational and operational decisions on its management and technical operation. It is proposed to achieve this goal by forming an entropy model of the dynamics of the synchronization system based on the analysis of the values of its diagnostic parameters. To identify the state of the process of functioning of the synchronization system, it is proposed to use differential entropy as a system-wide parameter for evaluating systems. The calculation of the differential entropy of the synchronization system is based on the values of the differential entropy of its elements, which are estimated based on the assessment of diagnostic parameters. Further identification of states is carried out by using pattern recognition algorithms. Methods: research methods are used in the work, which are based on the principles of the theory of networks and systems, system and mathematical analysis, entropy and mathematical modeling. Results: as a result of the research, an entropy model of the dynamics of the synchronization system was obtained, an approach was proposed for assessing the state of the synchronization system by analyzing its differential entropy as a system-wide parameter. The theoretical significance of the work lies in the expansion of the methodological base for the construction of control systems for the synchronization of communication networks. The practical significance of the work lies in the use of the obtained results for the design and modernization of synchronization control systems in the field of forming reasonable management decisions.

Classical MIMO system model without antenna selection and MIMO system model with antenna selection are presented. New quasi-optimal low complexity algorithms of antenna selection are proposed for MIMO communication systems. These algorithms allow to achieve high spectral efficiency without significant increase of complexity. The statistical modeling method is used to evaluate the efficiency of the proposed algorithms and to compare their characteristics with the characteristics of the known algorithms of full and partial combined selection. The computational complexity of the proposed algorithms is evaluated and been compared with the computational complexity of the well-known algorithms of full and partial combined selection in low-order and high-order MIMO system configurations. The possibility of practical application of new quasi-optimal algorithms in real communication systems is clearly demonstrated by comparative analysis of error-rate performance in conjunction with an assessment of computational complexity. These applications provide significantly improving of the energy performance of MIMO communication systems and it allows to improve quality characteristics of communications for subscribers or could be exchanged to the lower price of construction and maintenance of real communication systems.

The service of positioning subscribers of a system operating in the ultrasonic range, transmitting information in an information field, defined as a set of received all physical signals existing in a certain area of space, in which real-time data streams contain information about the characteristics of the propagation medium, about interactions and the location of objects, is considered. For testing, the system parameters of the service based on the technology of code separation of channels with direct spectrum expansion, information transmission, the area of space in which testing is carried out, devices for receiving and transmitting ultrasonic signals, equipment and software on which testing is carried out, the principle of correlation reception for measuring navigation parameters is defined, a system of equations is set determination of coordinates by the rangefinder method of navigation measurements and the method of least squares. A block diagram of algorithms implemented on the Virtex5-LX30 FPGA has been developed, the operation of the signal reception and processing stand in the information field and matrix expressions according to which individual nodes of the system algorithms work. The methodology of testing the navigation service is described, according to the results of the experiment, an analysis of the effectiveness of using the information field for navigation of subscribers by the values of deviations, and the factors causing them, of certain coordinates is carried out.

В технической литературе последних лет основное внимание уделялось разработке алгоритмов, моделей методик формирования шкал времени (ШВ) в Государственной службе времени и частоты.Вопросы частотно-временного обеспечения в интересах большого класса потребителей -пользователей сигналов навигационных систем типа ГЛОНАСС, высокоточной шкалы времени Государственной службы времени и частоты в сфере беспилотного транспорта, энергетики, систем фиксированной и мобильной связи и т.п.остаются далекими от практической реализации.В частности, проблемы реализации когерентной сети связи общего пользования остаются недостаточно замеченными, но требующими своего решения.В данной статье сделана попытка восполнить этот пробел.Рассматривается возможность реализации опорного узла формирования шкалы времени (ОУФШВ) когерентной сети связи общего пользования (КССОП), решается задача приведения ОУФШВ в гармоническое (когерентное) состояние со шкалой времени (ШВ) Государственной службы времени и частоты (ГСВЧ).В настоящей статье рассматривается главный вопрос -конкретная реализация шкалы времени в ОУФШВ -ядре КССОП

When developing algorithms and methods for generating and processing image signals (IS) used in devices based on single-matrix light-to-signal converters (LSC), the effects of not only the elements of the system included in the optical pathway (OP) located directly between the exposed image and device sensor, but also the specifics of the structure of color filter arrays (CFA) used in such cameras, applied to the surface of the matrix. In this article analyzed the most popular SSF subsampling structures and their impact on the spatial characteristics of the generated images. Based on the model for constructing these characteristics, a method is given for calculating the optimal parameters of anti-aliasing filters that match the properties of the OP and the sensor for a given characteristic of the optical system. Specific examples of calculating and optimizing such filters and evaluating their impact on the amplitude characteristics of signals are given. Based on the results of applying the developed method, formulated recommendations for the design of the CFA.

Introduction: a communication system is an integral part of any control system, which includes subsystems for diagnostics, monitoring and control of its condition. The imperfection of control modern means, diagnostics and monitoring leads to a situation where decision support systems and decision makers carry out their activities in conditions of uncertainty. The process of making a decision and responding to a change in the state of the system due to the influence of various factors can lead to the failure of the system to fulfill its tasks. To effectively solve this problem, the control system must constantly have reliable information about the state of its elements, and the decision support system for the state of the elements must predict the process of functioning of the communication system. The purpose of the study: to develop an approach to monitoring the functioning of the communication system, which allows obtaining reliable and timely information about the controlled object, as well as identifying and responding in a timely manner to deviations from the stable functioning of the communication system. Methods: using the process approach and the mathematical apparatus of the theory of hierarchical decisions to formalize the functioning of the communication system and form the profile of the communication system. Results: an approach for describing a communication system is proposed, including the tasks and functions of the system. Based on the needs of communication and control systems, a profile of the communication system functioning is formed, which is compared with the functioning process profile of the communication system formed in the process of the communication system functioning. The results of the comparison show the presence of conflicts caused by the influence of various destabilizing factors, the conditions of a changing environment and the control actions of a higher management system. The results obtained are used to form the field of decisions required by decision makers. Practical significance: the results of the study can be used in the design and construction of control systems, diagnostics and monitoring of the state of the communication system. The proposed approach can be used to control the fulfillment of tasks and functions of the communication system during its operation.

Increasing transmission path efficiency, as the largest consumer of electricity, is relevant for any wireless communication devices, digital television, and radio broadcasting. A number of methods are used to improve efficiency, including Envelope Tracking (ET) and Envelope Elimination and Restoration (EER, or Kahn method). Increasing the bandwidth of used frequencies in 5G radio systems requires expanding the modulation path DC amplifiers bandwidth to 250…500 MHz or more. The possibility of using amplifiers with input signal quantization (AISQ) as an alternative to the most common broadband hybrid modulators combining linear and switching (with PWM) amplification channels is considered. It is shown that in order to obtain AISQ high energy characteristics, it is advisable to perform, according to the scheme with output channels parallel connection, the switching of the amplifying cells along the input circuits and to reduce the saturation voltage on the output transistors. An approach has been developed for the AISQ characteristics optimizing according to the criterion of minimum losses. The example of AISQ parameters optimization and its energy characteristics calculation for a linearly increasing signal showed that, compared with a class B amplifier (n = 1), already with three-level quantization, the loss power in the AISQ decreases by 2...2.5 times (depending on the residual transistor voltage). A further increase in n leads to a less sharp decrease in the relative loss power, which, with the obvious complication of the circuitry implementation of such AISQ, makes the use of three-four-level quantization the most expedient. With these parameters, the AISQ becomes competitive with hybrid modulators and does not create electromagnetic interference from the PWM path.

As a whole calculation of reliability indicators and obtaining estimates of the reliability for infocommunication systems and networks is based on various assumptions about the distributions laws of empirical data obtained as a result of an experiment or during operation. As theoretical and practical studies an algorithm for calculating the numerical values of a random variable in a random process using the parametric method is presented. The article is aimed to transform different types of distribution. Calculated formulas are derived. The problem of obtaining a chi-square distribution from four normally distributed random sequences is solved. Software implementation was performed using the mathematical modeling program Matlab. Graphs are proposed to illustrate the transformation of a uniformly distributed random sequence into an exponentially distributed sequence. A comparison between theoretically and practically completed transformations is given.

In this paper, a comparative statistical analysis of errors during the passage of the Rayleigh channel by multiphase sequences is carried out on the example of the Zadoff–Chu sequence in unchanged form and with the use of a preliminary quantization procedure. Author makes use of the model of the Rayleigh channel of which is synthesized using the resources of models of communication channels of the MATLAB system in the variant of the Rayleigh communication channel of the EVA standard.

A telecommunications network is a group of nodes and connections between them, the main purpose of the organization of which is to transmit information for a certain period of time. Since the network is only a tool, the technologies of applying this tool to the transmitted information may vary, i.e. the algorithms for transmitting information between nodes, choosing the order of transmission, building routes from one node to another may differ depending on the principles of network organization and the goals of information transmission. One of these technologies is Segment Routing (SR), created in order to improve the methods of working with the network, its vision and eliminate the problems inherent in the technologies previously used on these networks. Segment routing represents an important evolutionary step forward in the design, management and operation of modern data transmission networks. An important mechanism for optimizing the use of network resources is the load balancing mechanism. Data on the status of nodes and data transmission channels in the network can significantly facilitate the task of ensuring load balancing in the network. This article is devoted to an overview of segment routing technology, consideration of existing prerequisites for more active implementation and use of this technology.