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Providing QOS for OTT Services in Communication Networks

Providing QOS for OTT Services in Communication Networks

引用

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

作者： A. B. Goldstein I. A. Belozertsev V. S. Elagin A. V. Spirkina The Bonch-Bruevich Saint-Petersburg State University of Telecommunications Saint-Petersburg Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

This article discusses the main models that contribute to improving the quality of OTT services. The main parameter for quality assessment was chosenQoE-Quality of Experience. An analysis was made of a number of factors that directly affect the assessment of QoE. The second part of the article deals with models that can provide the necessary level of quality for OTT services. These models were divided into three groups: traffic-based models, application-based models, and speed-based models. The main task of the study is to find optimal solutions to ensure the quality of OTT services.

关键词： OTT Services QoS MOS quality models Quality of service RBM15 gene mos Oncogenes METAL OXIDE SEMICONDUCTORS networks(communications) Legal Services Telecommunications Quality assessment optimal solution

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Blockchain Models to Improve the Service Security on board communications

Blockchain Models to Improve the Service Security on Board C...

引用

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

作者： A. G. Vladyko A. V. Spirkina V. S. Elagin I. A. Belozertsev E. A. Aptrieva The Bonch-Bruevich Saint-Petersburg State University of Telecommunications Saint Petersburg Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The present article introduces a definition of Blockchain, describes services implemented by this technology and the field of its application. The authors identify the main technical characteristics and their features associated with data transmission through the network. This article provides the operation principles of Blockchain technology and a block structure. The authors determine the network scheme working with blockchain transactions and the dependence of network characteristics on application parameters. The security aspects of data transmission within Blockchain technology are analyzed as well. The types of network attacks and Blockchain devices are listed in the article. In addition, the authors propose a Blockchain traffic identification model that allows discrediting the existing security mechanisms of this technology and makes services vulnerable to these attacks. Furthermore, the article offers recommendations on hiding the Blockchain traffic profile, which will significantly complicate its identification on the data network.

关键词： Blockchain distributed registry security data protection network computer information security Data Security DADANET Security data transmission technical features network characteristic computer network attack Legal Services Network

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Compact Highly Selective Microstrip Filters with Folded Hairpin Resonators

Compact Highly Selective Microstrip Filters with Folded Hair...

引用

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

作者： G. M. Aristarkhov I. N. Kirillov A. V. Markovsky V. A. Pustovalova Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

In this paper, we study the possibilities to significantly reduce the dimensions of the microstrip filters structures on co-directional hairpin resonators and at the same time to increase their frequency selectivity. It is shown that in these structures it is possible to form a large number (P = 2N) of attenuation poles at finite frequencies, which makes it possible to discharge the spurious passband spectrum up to the third harmonic. Moreover, the mechanisms of the formation, splitting, joining, and control of the attenuation poles position on the frequency axis are studied in order to ensure the required attenuation level in specified stopbands.

关键词： microstrip filters codirectional hairpin resonators lattice section electromagnetic interaction splittin and joining control of the working attenuation poles discharge the spurious passband spectrum Microstrip filters Electromagnetic interactions Resonator Device Component frequency selectivity

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Research of an Ultra-Wideband Distributed Amplifier Based on field-Effect Transistors

Research of an Ultra-Wideband Distributed Amplifier Based on...

引用

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

作者： N. D. Shmakov R. Yu. Ivanyushkin Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The main tasks are discussed in this paper such as in the construction of transmitters of digital television broadcasting, in particular the task of constructing a universal preamplifier, which can be used regardless of any particular channel. Distributed amplifiers permit to build wide-range power amplifiers with constant gain in the preset frequency range. The main feature of the construction of distributed amplifiers is using input and output capacitances of amplifying device in the artificial transmission lines. The main advantages and disadvantages of this type of amplifiers are presented in the paper. The method of calculation of distributed amplifier for UHF and the research its energetic characteristics are discussed in the paper. The further research tasks for this type of amplifier are given.

关键词： Distributed amplifier traveling wave amplifier field-effect transistor energy characteristics methods of calculation an amplifier 3rd order LPF links artificial long lines AM-AM characteristic AM-PM characteristic nonlinear distortions distributed amplifiers field effect transistors energy characteristics Amplifiers travelling wave amplifiers Ultra wideband technologies Nonlinear distortion digital video broadcasting computational methods

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The Application of the Joint Range and Speed Estimation Method in Short-Range Radars Using Ultra-Wideband signals with a Pseudo-Random Frequency Coding

The Application of the Joint Range and Speed Estimation Meth...

引用

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

作者： D. I. Sapronov I. V. Kamenskiy Moscow Aviation Institute (National Research University) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

This article uses the previously presented method [1] of joint estimation of range and radial velocity in short-range radars using one ultra-wideband signal with discrete frequency coded waveform (DFCW). The core of the method is the use of the expression of the two-dimensional digital compression function of the output of the radar receiver ADC. The results of the practical implementation of this method are presented in a radar with a generation circuit using a phase-locked loop (PLL) generator, direct digital synthesis generator (DDS) and a quadrature modulator (IQ modulator). The results of the method are compared for signals with linear and pseudo-random frequency codes. The results of the method after using the calibration algorithm are presented.

关键词： Ultra-wideband signals discrete frequency coded waveform linear DFCW pseudo-random DFCW Ultra wideband technologies radar Pseudorandom frequency coding Height finding radar signals joint estimation direct digital synthesis CORING METHODS Speed Estimation RADIAL VELOCITY Phase locked loops

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Interactive Built Environment in Shaping Users Orientation And Navigation in Space

Interactive Built Environment in Shaping Users Orientation A...

引用

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

作者： A. Y. Kudryashova K. V. Boychenko I. V. Boychenko Moscow Technical University of Communications and Informatics Moscow Russia University of Queensland Brisbane Australia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

Interactive properties allow the space to participate in social relationship, becoming the driving force of people's communication with the space. Interactive environment becomes a vehicle behind social interaction between the users in real time, creating unique common experience and navigating them through space. A full scale prototype is used to examine fundamental and applied questions of sensorial response integration into spatial communication between people and interactive built environment as a proof of concept. The paper examines the effect of interactive space stimuli and the visitors' responsiveness to signals from the space in order to shape their behaviour within the space and find the most effective ways of communication between visitors and interactive environment. Performed tests and observations allowed to assess the new qualities of interactive environment in shaping visitors experience and behaviour within the space on both personal and social levels, linking the conclusions to cybernetic background of the paper.

关键词： interactive space navigation algorithm communication navigation Interactive Communication Research Interactive environment Built environment algorithms Consumers geolocation measurement

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Object-Oriented Representation of Mixed Models Knowledge in the Design of Electronic Devices in CAD Electra

Object-Oriented Representation of Mixed Models Knowledge in ...

引用

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

作者： G. A. Dolin Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

At present days a promising direction is the development of information management systems design, allowing to describe the subject area in the form of a set objects. The purpose of this paper is to consider representation models knowledge in expert systems and highlighting the benefits of using object-based -approximate representation of knowledge about the design area radio device. This paper outlines the principles of construction object-oriented knowledge base management systems that would be compatible with existing programming languages with respect to structures representations of managed knowledge and would provide opportunities to integrate them into expert systems operating on the basis of the concept of open systems. It is proved that the most optimal is the separation of knowledge and meta-knowledge complex mixed types resulting from inheritance. At the same time, internal representation of complex objects formed as a result of inheritance, looks like inheritance chains. When working with complex this system automatically searches special links, allowing you to perform operations according to the SQL standard.

关键词： CAD electronic synthesis object oriented device design expert system object orientation Expert System Device Design Electron devices Electronics knowledge Computer-Aided Design DFFB gene Knowledge Representation synthesis Management Information systems Inheritance Schismus Epistemology

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Cyclostationary Evaluation of Voltage Crosstalk Between PCB's Transmission Lines

Cyclostationary Evaluation of Voltage Crosstalk Between PCB'...

引用

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

作者： A. B. Baev Yu. V. Kuznetsov M. A. Konovalyuk A. A. Gorbunova M. Nuzhnov Moscow Aviation Institute (National Research University) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

Theoretical and experimental evaluation of the crosstalk between transmission lines of the printed circuit boards (PCB) induced by the electromagnetic interference emitted by the random signals with cyclostationary properties are presented. The quantitative analysis of the crosstalk between two adjacent lines was evaluated by the bit error ratio (BER) of the communication link. The interference signal measured by the real time digital oscilloscope was characterized as a cyclostationary stochastic process. The cyclic averaging of the induced interference reveals the instantaneous periodic power corresponding to the variance of the probability density function (PDF). The PDF was obtained from the amplitude histograms constructed for each instant of time over the bit duration. Experimental evaluation of the BER for the communication link influenced by the voltage crosstalk was performed.

关键词： stochastic processes time-domain analysis electromagnetic interference electromagnetic compatibility Electromagnetic interference Time domain analysis electromagnetic compatibility Markov chain crosstalk Telecommunication links Bit error rate Stochastic Processes Transmission Lines Polychlorinated Biphenyls Inductive interference Power cables Printed Circuit board Device Component interfering signal RANDOM signals

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Calibration of a Planar Scanner for Near-field Antenna Measurements

Calibration of a Planar Scanner for Near-Field Antenna Measu...

引用

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

作者： M. V. Snastin E. M. Dobychina Moscow Aviation Institute National Research University Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The main goal of the work is to increase the near field measurement accuracy of antennas characteristics by performing calibration of planar scanner. This becomes possible when using the phaseless switching method for the diagnostics of amplitude and phase scanning errors. The novelty of the proposed solution lies in the fact that the phase state changing of the channel under calibration is performed without the usage of phase shifters by digital methods only. During the research process a simulation model of the calibration process was developed. That model was shown the convergence of the algorithm for any values of phase and amplitude errors. Special software for automatic estimation of measurement errors was developed. Experimental studies of a planar scanner in an anechoic chamber were carried out. The obtained results turn it possible to reduce the amplitude and phase measurement errors in the process of moving the scanner to values corresponding to the industrial standards of high-end devices.

关键词： calibration planar scanner measurement error anechoic chamber Anechoic chambers Error measure Antenna measurements Calibration Scanner Planar Amplitude Phase shifters

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Synchronous Methods of BPSK Signal Generation

Synchronous Methods of BPSK Signal Generation

引用

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

作者： V. E. Martirosov G. A. Alekseev Moscow Aviation Institute (National Research University) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The description and research results of characteristics of the patented by the authors BPSK signal shaper based on the globally linearized synchronization system (GLSS) are presented. GLSS is a phase locked loop (PLL) system with an unconventional structure optimized for speed in transient operation mode in accordance with the Pontryagin maximum principle. The structural algorithm of shaper provides the implementation of binary phase manipulation by the method of sequentially synchronizing system at neighboring points of stable equilibrium located on the phase portrait of GLSS, in contrast to traditional PLL, with a period of π radians. With using simulation program methods illustrate the possibilities of generating a BPSK signal directly at a carrier frequency of 6.4 GHz, with an information transfer rate of 300 Mbit/s. The obtained results indicate the promise of using a synchronous BPSK signal shaper based on GLSS in applications requiring high values of information transfer rates and signals shaping in the microwave range at the operating frequency of the infocommunication system, under conditions when the programmable element base is no longer applicable.

关键词： BPSK signal modulator high-speed synchronous technologies signals shaping directly in the microwave range of the operating frequencies Binary phase shift keying information transfer rate Shapers microwave range Phase diagrams Phase locked loops signals maximum principle patenting operating frequency CARRIER FREQUENCY Prolymphocytic Leukemia Outcomes Research

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