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

共 537 条记录，以下是331-340 订阅

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Measurement of Optical Spectrum by a Spectral Device Based on an Acousto-Optic Tunable Filter with a Stepwise Tuning Frequency

Measurement of Optical Spectrum by a Spectral Device Based o...

引用

2020 systems of signals generating and processing in the field of on board communications

作者： Moskaletz, O.D. Vaganov, M.A. Kazakov, V.I. Khomutov, A.S. Saint-Petersburg State University of Aerospace Instrumentation Saint-Petersburg Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147727

The role of spectral measurements in science and technology is noted. The measurement of optical spectra by an idealized spectral device based on an acousto-optic tunable filter is considered. It is shown that the acousto-optical methods of spectral measurements can be considered as a manifestation of the bilinear property of acousto-optical interaction. In this context, the transition to linear integral operators describing the measurement of the spectra of radio and optical signals is made. An analysis is given of the procedure for measuring the optical spectrum with a spectral device based on an acousto-optic tunable filter with an abrupt change in the frequency of the control signal. The comprehensive characteristic of such a device, its complex spread function, as well as the result of measuring the optical spectrum in the form of an energy spectrum, has been established. © 2020 IEEE.

关键词： optical signal optical spectrum spectrum measurement acousto-optic interaction bilinear spectral conversion spectral device based on acousto-optic tunable filter stepwise changing frequency control signal complex spread function optical spectra optical signals acoustic optical tunable filter tunable filters acousto-optics tuning frequency energy spectra Frequency variation

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Influence of Node Reliability on Data Exchange Efficiency in Distributed Monitoring systems with Dynamic Topology

Influence of Node Reliability on Data Exchange Efficiency in...

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2020 systems of signals generating and processing in the field of on board communications

作者： Borodin, V.V. Petrakov, A.M. Shevtsov, V.A. Moscow Aviation Institute National Research University Moscowy Russia

ISBN: (纸本)9781728147727

Dynamic routing protocols transmit routing information in a finite time, resulting in errors in determining the optimal packet route. As a consequence, the efficiency of data exchange may deteriorate, for example, increasing the time spent on the network packets. The aim of the work is to study the behavior of the network in the case of unpredictable topology changes caused by sudden multiple failures of network equipment. The solution is carried out with the help of a specialized simulation model that allows you to track the change in network parameters in the process of its operation. Simulation showed that equipment failures lead to a qualitatively new network behavior, for the characteristics of which, along with the traditional indicator 'packet delivery time', two characteristics are additionally defined: 'the proportion of lost packets' and 'the probability of packet looping'. A comparative analysis of several variants of the implementation of routing algorithms using multi-step and one-step metrics is performed and the conditions for choosing the optimal parameters of routing process control are determined. The results of the research allow us to determine the requirements for the speed of transmission of route information, characteristics of route labels and access control parameters depending on the network topology. © 2020 IEEE.

关键词： Electronic data interchange

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Inner parameters' optimization in the artificial neural network for the traffic data classification in radiofrequency applications: Classification of nonstationary data using the machine learning algorithm "random forest"

Inner parameters' optimization in the artificial neural netw...

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2018 systems of signals generating and processing in the field of on board communications

作者： Kalashnikov, Evgeniy Alexandrovich Kondybayeva, Almagul Baurzhanovna Ositis, Anastasia Petrovna Department of Automated Control Systems National University of Science and Technology 'MISiS' Leninsky Prospect 4 Moscow119991 Russia International Telecommunication Academy ul. Prechistenka 4 building 2 Moscow119034 Russia

ISBN: (纸本)9781538656228

The number of devices connected to the World Wide Web and the requirements of subscribers to the speed of mobile Internet access are increasing every year. Developers of telecom equipment and telecom operators, trying to meet new challenges, are preparing to seriously change the architecture of networks and interaction regulations in radiofrequency applications. Availability of required radiofrequencies in radiofrequency applications is one of the main necessary factors for the development of such networks, along with the readiness of the network architecture and infrastructure, business models and subscriber devices [1]. In the development of fifth-generation technologies in radiofrequency applications, there is a certain set of 'input' characteristics that serve as a guide for a new standard. For example, compared to the best existing LTE networks, the data transfer speed in 5G networks should be 10-100 times higher, the response time is 5 times less, the network should support the number of devices 100 times more[2-4]. The modern telecommunication market is at a stage when operators have a favorable opportunity to bypass all the convergence difficulties inherent in the networks of the past, and go directly to the next-generation networks based on technology, which received the working name NGN - 'New Generation Network'. In order to make this breakthrough and join the number of high-tech operators, new solutions are needed to be constructed in the field of creating and providing high-performance services. NGN - technology of building a network - is designed to provide data transmission services and voice services in radiofrequency applications. It removes a number of restrictions and barriers that exist now, and this is its economic productivity[4]. DPI (Deep Packet Inspection) - technology for the classification and filtering of traffic by its content. DPI is able to define application protocols (HTTP, HTTPS, Skype, BitTorrent), the type of data transferred (web

关键词： Websites

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Detection and Classification Architecture for SDR Based Radar Electronic Support Measure systems 32

Detection and Classification Architecture for SDR Based Rada...

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32nd IEEE Signal processing and communications Applications conference (SIU)

作者： Yavuz, Goktug Sami Saygili, Berkay Aydinli, Yasin Dalkiran, Rifat Esin, Irem Ulucay, Merit Uykulu, Batuhan Kiyma, Sumeyye Sena Arikan, Orhan Yildiz, Ayberk Yarkin TUBITAK BILGEM ILTAREN Ankara Turkiye ASELSAN Ankara Turkiye Politecn Torino Bilgisayar Muhendisligi Bolumu Turin Italy Bilkent Univ Elekt & Elekt Muhendisligi Bolumu Ankara Turkiye Northeastern Univ Elekt & Bilgisayar Muhendisligi Bolumu Boston MA USA

ISBN: (纸本)9798350388978;9798350388961

Electronic Support Measures (ESM) devices are key to situational awareness of the electromagnetic environment in the field. However, the current ESM systems tend to be physically large and cumbersome. To mitigate this problem, a portable ESM device is proposed. In this work, a compact single-board computer (SBC) is coupled with a Software Defined Radio (SDR) to create such a device. signals received by the SDR are sampled within the SDR and sent to the SBC. Those signals are then processed with various signal processing and machine learning algorithms to perform detection, measurement, and classification tasks. Later, these results are reported to the user.

关键词： electronic support measures radar signal processing machine learning software-defined radio

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Optimal traffic routing in radiofrequency applications using machine learning

Optimal traffic routing in radiofrequency applications using...

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2018 systems of signals generating and processing in the field of on board communications

作者： Kondybayeva, Almagul Baurzhanovna Ositis, Anastasia Petrovna Kalashnikov, Evgeniy Alexandrovich Department of Automated Control Systems National University of Science and Technology 'Misis' Leninsky Prospect 4 Moscow119991 Russia International Telecommunication Academy Line 2-name of Organization Acronyms Acceptable ul. Prechistenka 4 b. 2 Moscow119034 Russia

ISBN: (纸本)9781538656228

At present, the problem of switching from traditional circuit-switched networks to packet-switched networks (NGN) is one of the most urgent for telecom operators in radiofrequency applications. Perspective developments in the field of IP communications are connected with the creation of integrated solutions that allow the development of next-generation networks to maintain existing connections and ensure uninterrupted operation in any telephone access network: on the infrastructure of copper pairs, through optical channels, wireless (WiMAX, WiFi) and wired (ETTH, PLC and etc.) of the network. According to the concept of 'non-destructive' transition to NGN, such solutions should allow point-to-point transfer of certain segments to new technologies in radiofrequency applications without drastically changing the entire structure of the network. In particular, solutions for a 'nondestructive' transition to NGN must meet the following requirements: • Integration into the existing network of the operator, support not only for new transport technology, but also for the familiar management model;• Fully modular architecture with the capabilities of geographical distribution and redundancy;• The ability to flexibly increase productivity by purchasing licenses and adding servers to the system;• The possibility of introducing new types of services in the shortest possible time;• Compliance with the requirements of the legislation on network architecture [1-5]. Routing to date is determined not by formal rules and descriptions typical of networks of previous generations, but by customer requirements and economic considerations of the telecoms operator. To optimize the operation of networks in radiofrequency applications, various routing methods are being developed, ensuring a balanced load of all network resources. Among foreign scholars studying this problem, it is worthwhile to highlight D. Awduche, J. Malcolm, J. Agogbua, M. O'Dell, J. McManus, S. Hiroyuki, M. Yasuhiro, Y. M

关键词： Network routing

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On board communications: systems of signals processing and Radiofrequency Applications

On Board Communications: Systems of Signals Processing and R...

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

作者： S. S. Dymkova Oleg V. Varlamov Institute of Radio and Information Systems (IRIS) Vienna Austria Moscow Technical University of Communications and Informatics Moscow Russia Institute of Radio and Information Systems Vienna Austria

The article discusses the main topics and results of the scientific conference “systems of signals generating and processing in the field of on board communications”, in which leading industry experts annually exchange experience in the areas of: antennas and radio waves propagation, navigation and mathematical algorithms of an object Space orientation, radiofrequency applications, wire and optical communication and control systems, intelligent transport systems and digital signal processing in on-board radio systems.

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Methods of Detecting Latent Defects in Cells of the Super-Operative Memory of Microcircuits Used in the Digital Signal processing systems

Methods of Detecting Latent Defects in Cells of the Super-Op...

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2020 systems of signals generating and processing in the field of on board communications

作者： Smirnov, K.K. Ushkar, M.N. Nazarov, A.V. Blinov, V.V. Moscow Aviation Institute National Research University Scientific Research Institute of System Analysis Moscow Russia Moscow Aviation Institute National Research University Moscow Russia Scientific Research Institute of System Analysis Moscow Russia

ISBN: (纸本)9781728147727

The article reveals the reasons for the low efficiency of modern methods for detecting latent defects in the chips of super operative memory (further, memory chips) used in digital signal processing systems. The first reason is due to the constant decline in technological design standards. The second reason is that modern systems of functional testing the memory chips are not able to detect latent defects in the chips in real time. As a third reason, we can point out the insufficient effectiveness of modern 'marching' tests, which are widely used for testing memory chips. In this paper, we propose a complex approach to organizing memory chips testing. The main idea this approach is supporting a close relationship is maintained between the mathematical and topological models of the tested chip. It is this connection that eliminates the first two of the above reasons for the low efficiency of memory chips testing methods. The hardware-software complex, that implements this approach, ensures the maintenance of a unified information environment based on the original hardware-oriented programming language STeeL. To eliminate the third reason mentioned above, a special component 'Memory' was implemented as part of complex, which, unlike the well-known implementations, allows you to create functional tests of any complexity. This component implements the version of the 'marching' test, which is a short dynamic memory test based on statistics from previous tests. The latter circumstance significantly reduces the total time spent on testing chips. © 2020 IEEE.

关键词： Efficiency

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Digital audio broadcasting: high-grade service quality through on board processing techniques

Digital audio broadcasting: high-grade service quality throu...

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Proceedings of the 10th International conference on Digital Satellite communications. Part 2 (of 2)

作者： Losquadro, G. Alenia Spazio SpA Rome Italy

A Digital Audio Broadcasting (DAB) Satellite System provides optimized service and guarantees a high-grade quality service for hundreds of channels. With minimum cost of the radio set and the broadcasting station, this greatly improves radio broadcasting services worldwide, especially in areas involving difficult deployment of conventional relay infrastructures. This paper illustrates the advantages and the feasibility of a DAB system based on geostationary satellites with on-board processing generating signals of multiple channel per carrier (MCPC) type.

关键词： Satellite communication systems

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Adaptive noise cancellation schemes for magnetic flux leakage signals obtained from gas pipeline inspection

Adaptive noise cancellation schemes for magnetic flux leakag...

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IEEE International conference on Acoustics, Speech, and Signal processing

作者： Afzal, M Polikar, R Upda, L Upda, S Teradyne Inc Broadband Test Div Deerfield IL 60015 USA

ISBN: (纸本)0780370414

Nondestructive evaluation of the gas pipeline system is most commonly performed using magnetic flux leakage (MF L) techniques. A major segment of this network employs seamless pipes. The data obtained from MFL inspection of seamless pipes is contaminated by various sources of noise;including seamless pipe noise due to material properties of the pipe, lift -off variation of MFL sensor due to motion of the pipe and system noise due to on board electronics. The noise can considerably reduce the detectability of defect signals in MFL data. This paper presents a new technique for improving the signal-to-noise-ratio in MFL data obtained from seamless pipes. The approach utilizes normalized least mean squares adaptive noise filtering coupled with wavelet shrinkage denoising to minimize the effects of various sources of noise. Results from application of the approach to data from field tests are presented. It is shown that the proposed algorithm is computationally efficient and data independent.

关键词： Acoustic signal processing

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On the Parameters of Algebraic Geometric Codes Designed to Construct a Post-Quantum Algorithm for Ensuring Information Security of On-board systems

On the Parameters of Algebraic Geometric Codes Designed to C...

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

作者： K. N. Pankov M. M. Glukhov Moscow Technical University of Communications and Informatics Moscow Russia

This article clarifies the parameters of a quantum-resistant algorithm based on AG codes. This algorithm was proposed in previous works by the authors to counter the quantum threat when designing various on-board systems. The article describes the procedure for quickly decoding the corresponding codes, estimates the key length and the probability of applying one of the existing attacks to such algorithms. This work can be useful for increasing the security of arbitrary Internet of Things systems. .

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