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检索条件"任意字段=2018 Systems of Signals Generating and Processing in the Field of on Board Communications"

共 514 条记录，以下是81-90 订阅

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Modeling of Multiservice Traffic Service Process in a High-Throughput Satellite Network

Modeling of Multiservice Traffic Service Process in a High-T...

引用

systems of signals generating and processing in the field of on board communications

作者： Aleksandr Troegubov Sergey Stepanov Elena Malikova Do Xuan Thu Moscow Technical University of Communications and Informatics Moscow Russia University of Transport Technology Hanoi Vietnam

ISBN: (数字)9798331532635

ISBN: (纸本)9798331532642

The demand for satellite communication services is increasing every year. One promising solution is high-throughput satellite (HTS) networks in geostationary Earth orbit (GEO). To provide high-speed communications over a large area on the Earth's surface, HTS nodes use multi-beam onboard antennas. Modern communication systems handle multiservice traffic, including real-time and elastic traffic, requiring efficient radio resource management. This paper addresses the problem of servicing multiservice traffic in an HTS node, where elastic traffic service rates are constrained. To evaluate quality-of-service (QoS) metrics, a mathematical model based on Markov process theory is developed. Efficient resource utilization while meeting strict QoS requirements is crucial; therefore, an approximate method is introduced to estimate key service parameters. The proposed method is both fast and accurate, enabling real-time computation for resource planning and optimization tasks. Its performance is evaluated through numerical experiments, demonstrating its effectiveness in the low-loss region of request servicing. Furthermore, the method is applied to a channel resource planning problem, illustrating its efficiency in determining the minimum resource requirements needed to meet predefined QoS targets.

关键词： Measurement Earth High-temperature superconductors Satellite broadcasting Quality of service Mathematical models Real-time systems Planning Resource management Planetary orbits

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Application of Virtualization and Containerization Technologies in IP Telephony

Application of Virtualization and Containerization Technolog...

引用

systems of signals generating and processing in the field of on board communications

作者： V. M. Antonova E. E. Malikova A. Y. Malikov M. A. Fartyshev Moscow Technical University of Communications and Informatics Moscow Russia V.A. Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences Moscow Russia

ISBN: (数字)9798331532635

ISBN: (纸本)9798331532642

The article considers the contemporary trends that telecommunication companies are facing in the rapidly changing technological environment. One of the trends is the technology of network virtualization, which allows to significantly increase the efficiency of network resources through the organization of multiple virtual resources based on one physical resource. The objective of this study is to analyze new tools available for the implementation of a virtual IP PBX. Virtualization and containerization technologies that affect the efficient operation of VoIP services are studied in the paper. The implementation of these technologies has been shown to facilitate more efficient use of server resources and more secure interaction with multiple tools for analyzing system operation. The principles of integrating software telephone exchanges into the virtualized environment are considered. Special attention is paid to the integration of a virtual Asterisk exchange into the containerized environment. Approaches to automating Asterisk's deployment and management in the microservice architecture using a Kubernetes platform are also considered. It is recommended that virtualization and containerization technologies should be incorporated into the curricula of technical universities.)

关键词： systems operation Telephony Containers Market research Telephone sets Virtual machines Software IP networks Servers Virtualization

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A Refined Method for Subjective Assessment of the Warmth and Coldness of Colors

A Refined Method for Subjective Assessment of the Warmth and...

引用

systems of signals generating and processing in the field of on board communications

作者： A. M. Potashnikov I. V. Vlasuyk V. V. Kudryashov Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9798331532635

ISBN: (纸本)9798331532642

The article is devoted to the study of subjective warmth-coldness of colors for various tasks, primarily color contrasting. The study was conducted for 80 colors at average brightness. Based on the primary data, an inaccurate model was created that allows determining warmer colors for obvious cases. Based on the model, a clarifying method for subjective assessment of warmth-coldness was implemented, which made it possible to reduce the number of subjective tests per subject, thereby increasing the quality of the results. Reducing the number of tests also made it possible to increase the density of the colors in question, which also positively affected the accuracy of the resulting model. The article presents a method for determining warmth-coldness taking into account the inaccurate model, as well as the results of experiments of primary and refined tests. Based on the experimental results, a new model was built, its accuracy was analyzed, and conclusions were made on the possibility of applying the research results for color contrasting. In addition, for convenience and the possibility of using intermediate colors, the model was approximated using polynomial regression, the regression error was analyzed, and conclusions were made on the possibility of practical use of approximated data instead of experimental data.

关键词： Heating systems Analytical models Accuracy Image color analysis Brightness Gray-scale Data models Polynomials Color temperature Sorting

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Joint Optimization of Reconfigurable Intelligent Surface Phase Shifts and Power Allocation in LEO-NOMA systems Using Soft Actor-Critic

Joint Optimization of Reconfigurable Intelligent Surface Pha...

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systems of signals generating and processing in the field of on board communications

作者： Khalil M. Yahia Ibrahim S. Wahbi Dmitry A. Klimov Tammam Z. Dawood Moscow Technical University of Communications and Informatics Moscow Russia Department of Electronics and communication Engineering Damascus university Damascus Syria

ISBN: (数字)9798331532635

ISBN: (纸本)9798331532642

Combining Reconfigurable Intelligent Surfaces (RIS) with Non-Orthogonal Multiple Access (NOMA) offers a promising way to improve spectral efficiency and energy utilization in Low Earth Orbit (LEO) satellite networks. However, the highly dynamic nature of LEO environments make it challenging to optimize RIS phase shifts and power allocation in real time. This paper introduces a reinforcement learning-based framework that applies the Soft Actor-Critic (SAC) algorithm to jointly optimize RIS configurations and power allocation among users. The proposed method works in two stages: first, SAC fine-tunes RIS phase shifts while keeping power allocation fixed; then, it dynamically adjusts power levels to enhance overall system performance. This method, in contrast to traditional strategies that depend on perfect channel state information (CSI), focuses on adaptive decision-making aimed at maximizing rewards, effectively mitigating the impact of channel estimation errors during training. Simulation results confirm that the SAC-based framework effectively boosts channel capacity without requiring additional transmission power. Furthermore, integrating RIS with NOMA further enhances performance, making it a strong candidate for next-generation satellite communications.

关键词： Training NOMA Heuristic algorithms Satellite broadcasting Low earth orbit satellites Channel estimation Reconfigurable intelligent surfaces Mathematical models Resource management Optimization

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Simulation of the Functioning of Self-Adjusting systems with Additive and Parametric Feedback

Simulation of the Functioning of Self-Adjusting Systems with...

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systems of signals generating and processing in the field of on board communications

作者： S. L. Yablochnikov I. O. Yablochnikova V. B. Dzobelova I. A. Abrosimova E. A. Avdeeva Plekhanov Russian University of Economics National Research University Moscow Power Engineering Institute Moscow Russia National University of Science and Technology «MISIS» Moscow Russia North Ossetian State University named after Kosta Levanovich Khetagurov Vladikavkaz Russia Moscow State University of Civil Engineering Moscow Russia Saint Petersburg Mining University JSC “Central Design Bureau ‘Lazurit’” St. Petersburg Russia

ISBN: (数字)9798331532635

ISBN: (纸本)9798331532642

For processes implemented in various control systems, it is often necessary to ensure the presence of selfadaptation (self-learning) properties, in particular, this is important when the control object is characterized by a wide range of transmission coefficient changes, as well as if it is necessary to ensure the stability of the quality of the object's control processes when exposed to a set of parametric disturbances. The successful operation of control systems in such conditions must be ensured so that the system's response to this signal is adequate and effectively formed in accordance with the quality criterion, for example, the minimum error. One of the ways to solve such problems is to integrate additive parametric feedback circuits into the control system. At the same time, it is necessary to ensure that the condition regarding the independence of the error value from the values of the object parameters is fulfilled. This, in turn, ensures that errors are minimized. The authors of this scientific study have developed and substantiated a way to ensure such a condition for minimizing control errors by forming a parametric feedback subsystem. Other means are also proposed and justified to minimize errors in the management of systems and processes of various types.

关键词： Economics Industries Feedback loop Additives Multidimensional systems Feedback circuits Stability criteria Process control Hierarchical systems Control systems

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Architecture of the Regional Transport Navigation and Information systems

Architecture of the Regional Transport Navigation and Inform...

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Conference on systems of signals generating and processing in the field of on board communications

作者： Dokuchaev, V. A. Gorban, E., V Maklachkova, V. V. Moscow Tech Univ Commun & Informat Multimedia Networks & Commun Serv Moscow Russia

This article describes the main principles of architecture design at development the transport navigation information systems in the Russian Federations.

ISBN: (纸本)9781538656235;9781538656228

This article describes the main principles of architecture design at development the transport navigation information systems in the Russian Federations.

关键词： navigation transport complex telematics architecture satellite vehicle traffic

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Redundancy of optical fibers in underwater cables

Redundancy of optical fibers in underwater cables

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Conference on systems of signals generating and processing in the field of on board communications

作者： Zubilevich, Alexander Sidnev, Sergei Tsarenko, Vladimir Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781538656235;9781538656228

Nowadays underwater optical cables have the total length of over 300,000 kilometers and they ensure communications between dozens of countries and continents divided by seas and oceans. Reliable operation of such cables is the key objective in the course of designing of communications lines. This article deals with issues of redundancy in underwater optical cables.

关键词： optic fiber cables (OFC) optical fibers (OF) transmission system (TS) Kolmogorov's theorem redundancy of systems reliability of systems uncertainty accounting

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Ways of integrating information, controlling and telecommunication systems-based on ground and on board-on a process basis

Ways of integrating information, controlling and telecommuni...

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Conference on systems of signals generating and processing in the field of on board communications

作者： Kozlov, Sergey Vitalievich Kubankov, Alexander Nikolaevich Russian Acad Sci Fed Res Ctr Comp Sci & Control Moscow Russia Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781538656235;9781538656228

This article reviews the problems of development of ground and on-board based information, controlling, and communication systems as a part of general controlling system;that is a complex of controling bodies, points and tools, and respective organizational, technical and technological processes. The development of abovementioned systems is based on the process approach to their integration.

关键词： controlling system information control and telecommunication system process approach organizational technicall technological processes

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Parameters Monitoring Methods for the DWDM systems

Parameters Monitoring Methods for the DWDM systems

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Conference on systems of signals generating and processing in the field of on board communications

作者： Sergey, Trukhin Sergey, Melnik Elena, Petrova CSRTI Moscow Russia Moscow Tech Univ Commun & Informat Moscow Russia Int Telecommun Acad Geneva Switzerland

ISBN: (纸本)9781538656235;9781538656228

Upon transition to new generation telecommunication networks it is important to have management and supervision for all network levels. Therefore the problem of monitoring of parameters of the FOTN base network with wavelength division multiplexing is of great importance. Bases of this mechanism which are used for creation of control systems of communication networks of new generation are given in article.

关键词： WDM Monitoring Parameter

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On-board brain-computer interface based on the recognition of patterns of brain activity through a convolutional neural network

On-Board brain-computer interface based on the recognition o...

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Conference on systems of signals generating and processing in the field of on board communications

作者： Makhrov, Stanislav S. Denisova, Elena N. Moscow Tech Univ Commun & Informat Sci Res Dept Moscow Russia Moscow Tech Univ Commun & Informat Informat Technol Dept Moscow Russia

ISBN: (纸本)9781538656235;9781538656228

This paper presents the prototype of brain-computer interface (BCI), designed to control on-board systems. BCI functions of the basis of an artificial convolutional neural network that recognizes the patterns of activity of the human brain. The device is characterized by a high-precision classifier of brain activity patterns, as well as high quality and stability of recording brain activity signals. The results of the recognition quality obtained during the experiment are presented.

关键词： brain-computer interface neural interface board control convolutional neural network brain activity

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