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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"

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Transforming the Structure of Spectrally Effective Radio signals for Amplification in Nonlinear Power Amplifiers

Transforming the Structure of Spectrally Effective Radio Sig...

引用

2021 systems of signals generating and processing in the field of on board communications, SOSG 2021

作者： Pechnikov, S.S. Sherstukov, S.A. Voronezh Institute of the Russian Ministry of the Interior Voronezh Russia

ISBN: (纸本)9780738130897

The article discusses signals with amplitude-phase modulation used in special-purpose communication networks. A description of the transformation of the structure of spectrally effective radio signals for amplification in nonlinear power amplifiers is given and the element base for its implementation is considered. Simulation of the application of the transformation of the signal structure in the baseband for nonlinear amplification of spectrally effective narrowband radio signals is carried out. © 2021 IEEE.

关键词： Power amplifiers

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Virtual Advanced Driver-Assistance systems Tests

Virtual Advanced Driver-Assistance Systems Tests

引用

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

作者： V. V. Gaevskiy N. V. Popov S. R. Kristalniy M. A. Toporkov A. N. Andreev Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

The article deals with the issue of testing highly automated vehicles (HAVs). Particular attention is paid to virtual testing using hardware-software complex (HSC). Siemens PreScan is used as a software implementation environment for HSC. A technique for testing vision aids based on radar sensors as part of an automatic emergency braking system (AEBS) is proposed. Special attention is paid to the influence of such effects as atmospheric attenuation of radio waves, as well as occlusion. A methodology is also proposed for conducting virtual tests of the effectiveness of LANE SUPPORT systems (LSS). The methodology includes test scenarios implemented in various weather and road conditions in the Advanced driver-assistance systems (ADAS) testing software package. Test scenarios for virtual simulation were developed based on the ISO 17361:2007 test type: changeover to the left lane on a straight section of road through a broken marking line. The results of virtual testing according to the proposed methodology for the effectiveness of the Lane departure warning (LDW) system of the Audi A8 are presented. A monochrome video camera is used as a technical vision device for the operation of the LDW system.

关键词： Software packages Roads Software algorithms systems architecture Radar Sensor systems Sensors

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Evaluation of Influence of the Radio Receiving Devices Heterodynes Functioning Quality on the Quadrature Amplitude Modulation Digital signals Reception Noise Immunity

Evaluation of Influence of the Radio Receiving Devices Heter...

引用

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

作者： German Leon D. S. Koptev Department of Space Instrumentation and Communication Systems Southwest State University Kursk Russia

In digital transmission lines with quadrature amplitude modulation of signals the information is contained in the change in the amplitude and phase transmission of the signal. Therefore, in comparison with other types of modulation, there are more stringent requirements for the level of phase noise of the signal at the input of the QAM-signal demodulator, leading to a decrease in the reliability of reception. This article will consider the requirements for short-term frequency stability of synthesizers of transmission lines, which use signals of multi-position quadrature-amplitude modulation in conjunction with quasi-coherent reception of these signals. The carrier is extracted on the receiving side directly from the received QAM-signal using a carrier recovery device by demodulating the received signal and then its subsequent narrow-band filtration. As a narrow-band tunable filter, an auto-tuning frequency switching system is used. With the improvement in the filtering quality of the demodulated signal, the phase fluctuations of the restored carrier associated with the action of additive noise are reduced, the energy losses of the applied quasi-coherent reception are reduced in comparison with the ideal one, which requires the complete absence of the phase error of the selected reference signal. The approximation of the noise immunity of real coherent QAM-signal demodulators to the theoretical one limits the phase noise of the signal at the input of the demodulator associated with the imperfection of the frequency synthesizers on the transmitting and receiving sides of digital communication lines.

关键词： Phase noise Frequency synthesizers Power system measurements Frequency modulation Power transmission lines Density measurement Quadrature amplitude modulation

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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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Reflexive Control of Data Transmission in the Human-Machine Interface

Reflexive Control of Data Transmission in the Human-Machine ...

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2021 systems of signals generating and processing in the field of on board communications, SOSG 2021

作者： Dronseiko, V.V. Zabudskiy, A.Yu. Vorobyev, A.I. Shalagina, E.A. Pakhomova, A.A. Moscow Russia

ISBN: (纸本)9780738130897

The article considers the principle of reflexive control in relation to the design of the human-machine interface in vehicles with different levels of automation. The principle of information processing and decision-making by the driver in the 'D-A-R' system is considered, as well as the mathematical apparatus of the decision-making process in reflexive reasoning and an example of the corresponding reflexive control is given. © 2021 IEEE.

关键词： Man machine systems

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Problemic Issues of Deploying Cooperative Intelligent Transport systems during of Digital Transformation

Problemic Issues of Deploying Cooperative Intelligent Transp...

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2021 systems of signals generating and processing in the field of on board communications, SOSG 2021

作者： Mikhalevich, I.F. Russian University of Transport Moscow Institute of Transport Engineers Moscow Russia

ISBN: (纸本)9780738130897

The article discusses the problematic issues of the development of intelligent transport systems and the deployment of cooperative intelligent transport systems, taking into account the issues of ensuring the safety of critical infrastructures during digital transformation. Attention is paid to terminology as an effective means of bringing together the opinions of specialists from interdependent but in fact weakly interacting areas of knowledge, as well as a strategy for digital transformation. © 2021 IEEE.

关键词： Intelligent systems

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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...

引用

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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The Energy Spectrum of the Noise Modulation Function under the Influence of Slow Multiplicative Noise

The Energy Spectrum of the Noise Modulation Function under t...

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

作者： V. M. Artyushenko V. I. Volovach Information Technology and Management Systems Department Technological University Korolev City Russia Informational and Electronic Service Department Volga Region State University of Service Togliatty City Russia

The effect of slow multiplicative noise on the energy spectrum of the noise modulation function is analyzed. Two cases of determining the energy spectrum are considered: with signal distortions described by a narrow-band normal stationary random process, and under the influence of pulse-fluctuation noise. The corresponding mathematical expressions of the energy spectra are obtained, including the case of deep phase distortions. It is shown that when narrow-band multiplicative noise affects the signal, a discrete component is present in the energy spectrum of the noise modulation function. Wherein the depth of the phase distortions will determine the power of said discrete component. The distribution pattern of the continuous part of the energy spectrum of phase distortion is determined by the ratio of the width of the named spectrum to its average frequency. With pulse-fluctuation modulating noise with a deterministic clock interval, the energy spectrum of the noise modulation function is the sum of continuous and discrete parts. Expressions are obtained for determining the discrete and continuous parts of the energy spectrum of the noise modulation function under the influence of modulation noise. The conditions under which the spectrum consists only of discrete components are given.

关键词： Frequency modulation Phase modulation Random processes Phase distortion Manganese Clocks

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Methodology for Calculating the Mass of a Vehicle in Dynamics using a Discrete Piezoelectric Sensor in Automatic Weight and Dimensional Control systems

Methodology for Calculating the Mass of a Vehicle in Dynamic...

引用

2021 systems of signals generating and processing in the field of on board communications, SOSG 2021

作者： Dzhabrailov, Kh.A. Chantieva, M.E. Gematudinov, R.A. Ilyukhin, A.V. Safyanov, I.V. Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9780738130897

The technique of calculation of vehicle weight with the use of discrete piezoelectric sensor for automatic weight and dimensional control systems of vehicles, allowing to make calculations with the least errors in comparison with the existing monocrystal analogues, is presented. Improving the accuracy of measurements is necessary to improve the quality of the procedure for assessing the physical characteristics of the vehicle at the points of automatic weight and dimensional control © 2021 IEEE.

关键词： Piezoelectricity

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Some Aspects of the Synthesis of Automated Singularly Perturbed Control systems

Some Aspects of the Synthesis of Automated Singularly Pertur...

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

作者： V. S. Artemyev M. N. Makhiboroda S. L. Yablochnikov I. O. Yablochnikova F. K. Khutugova Russian Biotechnological University Moscow Russia Russian University of State for Social Moscow Russia Moscow Technical University of Communications and Informatics Moscow Russia North Ossetian State University Named After Kosta Levanovich Khetagurov Vladikavkaz Russia

Researchers of numerous aspects of the implementation of optimal control over the past few decades have paid significant attention to solving problems related to the synthesis of object control systems, phenomena and processes of various nature, including such systems, the structure and content of which significantly change during their operation. Mathematical modeling of the processes of functioning of such systems, as a rule, is realized by forming systems of a large number of differential equations. At the same time, in order to ensure the quality of modeling and subsequent effective control of various objects, special attention is paid to the analysis of the properties of the set of coefficients of the above differential equations. In turn, the above circumstance necessitates a deep modernization of algorithms for solving the so-called "regular problems" of system synthesis. The purpose of this article is to develop a number of approaches and a set of algorithms that allow you to successfully synthesize adequate mathematical models of the so-called singular-perturbed systems in general, and in particular, their individual structural components. The methodology for implementing this scientific research is based on mathematical modeling and subsequent forecasting of the functioning of specific controlled objects and processes, as well as their control systems.

关键词： Analytical models Process control Optimal control Differential equations Predictive models Mathematical models Approximation methods

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