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检索条件"任意字段=2020 Systems of Signals Generating and Processing in the Field of on Board Communications"

共 515 条记录，以下是411-420 订阅

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Blind Two Real signals Separation Method Based on Third Order Cumulants

Blind Two Real Signals Separation Method Based on Third Orde...

引用

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

作者： Kuchumov, A. A. Liberovskiy, N. Y. Priputin, V. S. Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781728106069

This paper describes a blind two real signals separation method. Blind separation implies that there is no information about the signals except for received samples. This eliminates the presence of a systematic error in determining the stirring matrix and the restoration of the original signals. As a criterion for the separation of signals in this paper, the cumulants of the second and third orders of the output signals were reduced to zero. To test the performance of the method, mixing and separation model was created, and the efficiency of the method was tested at various power levels of the intrinsic noise in the receiving channels.

关键词： blind source separation digital signal processing cumulant mathematic model perfomance index

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About Cycle Stationary of APSK-N-signals Observed on the Output of Communication Channel with Intersymbol Interference

About Cycle Stationary of APSK-N-Signals Observed on the Out...

引用

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

作者： Fayzullin, R. R. Lerner, I. M. Kazan Natl Res Tech Univ Kazan Russia

ISBN: (纸本)9781728106069

An algorithm for determining the conditions under which the multi-position amplitude-phase manipulated signal at the output of the communication channel becomes a cyclostationary process is presented. The results of its use were used to estimate the resolution times and effective memory for various types of amplitude-frequency responses of the channel presented in this paper. New properties were revealed for channels with ISI

关键词： ISI channel with memory cyclo-stationary process SER

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Application of Weber-Fechner Law in Image Transmission in the field of Onboard communications

Application of Weber-Fechner Law in Image Transmission in th...

引用

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

作者： Kudryashova, A. Y. Adzhemov, A. S. Vlasuyk, I. V. Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781728106069

In the modern world, image transmission, including transmission of television and video signals, is carried out using a preliminary and restorative correction according to the law, which was due to the use of imaging devices on cathode ray tubes. This law differs from the law of dependence of the visibility threshold of a visual stimulus on its magnitude, but continues to be used for compatibility reasons. Therefore, in the work, instead of linearizing the sensations of the quantization scale of a television signal, it is proposed to optimize the choice of code combinations for image transmission. This approach can be effective in television systems without compression of video information with losses, for example, for transmitting signals over short distances or in channels for transmitting signals of the image of Earth remote sensing systems

关键词： Weber-Fechner law gamma correction transfer characteristic efficient coding risk matrix probability matrix

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The Rational Checks Amount Selection for the Information Management systems Troubleshooting

The Rational Checks Amount Selection for the Information Man...

引用

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

作者： Goncharov, V. V. Goncharov, A., V Matyunina, D. D. Shishova, N. A. Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781728106069

The questions of creating a rational set of controlled parameters of the information management system in order to maintain it ready to perform tasks for functional purposes. The main attention is paid to the study of the range of changes in the parameter and its impact on the performance of individual devices and the system as a whole.

关键词： controllable parameter fault reliability Markov random process the access boundary probability density mathematical expectation dispersion

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The Study of Probabilistic Characteristics of Cyclo-Stationary APSK-N-signals Caused by Communication Channel with Memory

The Study of Probabilistic Characteristics of Cyclo-Stationa...

引用

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

作者： Odintsov, V. L. Lerner, I. M. Fayzullin, R. R. Il'in, V. I. Kazan Natl Res Tech Univ Kazan Russia Kazan Fed Univ Kazan Russia

ISBN: (纸本)9781728106069

New properties of communication channel with intersymbol interference utilizing by APSK-N-signals are investigated. Based on estimates of the symbol error rate caused by intersymbol interference, the possibility of increasing the data transmission rate in the channel due to "transparency windows" is estimated. New properties have been identified that allow a significant increase in the efficiency of such communication channels.

关键词： ISI channel with memory cyclo-stationary process SER

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Testing, Verification and Validation of Distributed Ledger systems

Testing, Verification and Validation of Distributed Ledger S...

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

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

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

Improving the quality of software that implements distributed ledger systems based on blockchain technology is an urgent task for the transport industry. In this article, we will look at tools to improve quality such as testing, validation, and validation. The paper lists a number of existing tools for testing and verifying blockchain systems and smart contracts, and also identifies the problem of the lack of an appropriate normative base and standards in this area.

关键词： Industries Distributed ledger Standards organizations Blockchain Tools Task analysis Testing

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A Narrow-Band Interference Compensation Device Based on a Digital Filter Bank for Broadband Low-Energy HF Radio Lines

A Narrow-Band Interference Compensation Device Based on a Di...

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

作者： Lobov, E. M. Shubin, D. N. Moscow Russia ? Moscow Russia

ISBN: (纸本)9781728106069

The article presents a device for narrowband interference compensation on the basis of a bank of digital filters for broadband low-energy HF radio links. An analytical comparison is made of the effectiveness of signal reception algorithms in the presence of narrowband interference. The algorithm of optimal reception with the normalization of the power spectral density and the algorithm of reception with the rejection of the part of the spectrum affected by interference are compared. An algorithm and a device based on a bank of digital filters are proposed, ensuring the normalization of the power spectral density in accordance with the optimal reception algorithm. The results of the simulation and field experiment on the processing of wideband signals in the presence of interference with the help of the developed program module for the normalization of the spectral power density are presented.

关键词： wideband signals HF radio ionosphere digital filter banks narrowband interference performance

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Direct Digital Synthesizers of Complex Broadband signals

Direct Digital Synthesizers of Complex Broadband Signals

引用

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

作者： Ryabov, I., V Strelnikov, I., V Tolmachev, S., V Kljuzhev, E. S. Volga State Univ Technol Yoshkar Ola Russia

ISBN: (纸本)9781728106069

Principles of design and structural-schematic schemes of direct digital synthesizers, based on the direct digital frequency and signal synthesis method are presented. The block diagrams of direct digital synthesizers based on digital code accumulators and with an M-shaped frequency variation law are given. DDS allow synthesizing signals with amplitude, frequency and phase modulation in the frequency range from 0.001 to 400 MHz.

关键词： direct digital synthesis direct digital synthesizers digital frequency synthesizers DAC low-pass filter function generator code-sine digital frequency accumulator digital phase accumulator level of amplitude noises phase noise

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Some Generalization of the Theory of generating Functions

Some Generalization of the Theory of Generating Functions

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

作者： I. V. Chernova Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The author invites readers to consider some very unusual methods of calculations that he performed while solving the problem of analytic continuation of the Riemann function containing the critical strip inside of which there is an infinite set of nontrivial zeros of function by B. Rieman's hypothesis. Similar methods are used by the author when studying the properties of the generating function of Hermite polynomials with a nonnegative integer exponent.

关键词： generating function generalized summation of rows analytic continuation critical band the Riemann function ? (s) generating functions critical band infinite set RIEMANN FUNCTION Hermite polynomials

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Information Technology in The Mobile Application of Analysis and Correction of The Diet of Individual Healthy Nutrition

Information Technology in The Mobile Application of Analysis...

引用

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

作者： Bruevich, N. A. Ivashkin, Yu A. Nikitina, M. A. Moscow Tech Univ Commun & Informat Moscow Russia Russian Acad Sci VM Gorbatov Fed Res Ctr Food Syst Moscow Russia

ISBN: (纸本)9781728106069

This article deals with the problem of developing and implementing a mobile software product for compiling a healthy human nutrition ration using IT technologies. An analysis of existing software applications in this area for desktops;developed functional requirements for a mobile computer system for healthy nutrition, formulated the conceptual foundations of information technology, formalized the general decision-making support algorithm in the preparation and optimization of a healthy diet.

关键词： healthy nutrition diet composition interchangeability compatibility it-technologies expert systems mobile applications

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