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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451-460 订阅

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The Study of the Topological Elements of the Printed Circuit board as an Antenna when Receiving GPS signals

The Study of the Topological Elements of the Printed Circuit...

引用

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

作者： I. V. Malygin A. S. Luchinin A. A. Plesovskikh Ural Federal University Yekaterinburg Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The number of electronic and service devices using GPS/Glonass/Beidow/Galileo receiver location data is continuously increasing in the modern world. This process can be attributed to the ever-decreasing cost of the elemental base, as well as the improvement of distribution and logistics problems due to accurate knowledge of object coordinates. Mass production of receivers of global navigation systems (GNS), as well as any other electronic devices, is critical to the cost of electronic components included in it. The proposed article is devoted to the study of the possibility of replacing the antenna of GNS receivers with elements of the topology of the printed circuit board of the third-party electronic device.

关键词： GPS Glonass Beidou Galileo antenna topology printed circuit board Printed Circuit board Device Component ANTENNA antennae galileo satellite navigation systems Global Positioning systems topology Global Navigation Satellite System Circuit board Device Component Electron devices Receivers GNS gene Electronic components

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Review Methods for Calculating the Path Losses in a Closed Trans-Horizon Radio Link

Review Methods for Calculating the Path Losses in a Closed T...

引用

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

作者： I. V. Golovkin M. M. Tolkachev Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The article presents 2 methods for calculating the losses in the propagation of the radio signal of the tropospheric horizontal line. The key topic is the consideration and comparison of the described methods in Russian literature by scientists *** and *** and comparing them with the ITU international recommendation calculations. The presented calculations are valid for propagation paths of a radio signal with frequencies from 30 MHz and for distances up to 700 km. The article mentions the main signal transmission mechanisms used through the troposphere.

关键词： channel model propagation loss diffraction tropospheric scattering over-the-horizon communication Propagation losses channel model RADIO signals diffraction path loss troposphere Radio links

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Direction of Arrival Estimation Using Cyclostationary Properties of Wi-Fi signals

Direction of Arrival Estimation Using Cyclostationary Proper...

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

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

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

In this paper the DOA estimation of Wi-Fi signals is consider based on their cyclostationarity property due to the digital modulation. The cyclic autocorrelation and complementary cyclic autocorrelation characteristics are shown for various modulation types used in 802.11 a/b/g standards. The simulations and experimental investigation results are presented.

关键词： direction of arrival Wi-Fi signals cyclostationary properties cyclic frequency complementary cyclic correlation extended cyclic correlation matrix MUSIC algorithm Direction of arrival estimation Wi-Fi cycle efficiency Angle of arrival modulation type

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Technology for Collecting and Data processing of Street-Road Network Monitoring Objects

Technology for Collecting and Data Processing of Street-Road...

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

作者： A. A. Tsesar S. V. Varshavskiy Yu. E. Vasiliev M. A. Fineeva SIE "MADiDT" Moscow Russia Department of Road Building Materials Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

The scheme of monitoring objects of the street-road network using mobile road laboratories is described. Examples of the most successful domestic laboratories are given. The data flows and data exchange formats of the mobile complex of multi-criteria assessment of the operational condition of the objects of the road network "Automated Road Scanner" are considered. The dependencies for predicting the international roughness, wheel tracking, and traction coefficient index are given. An original technology for a comprehensive assessment of the transport and operational condition of street and road network objects based on modern high-tech equipment, which can be used for all types of inspections, is described. A reasonable conclusion is made that the use of the proposed technology has significantly reduced the cost of monitoring and the number of errors in the detection of pavement defects. The study justified the use of the pavement condition index to decide on the assessment of its condition: normal, satisfactory, unsatisfactory, or emergency. The conclusion outlines the prospects for the development of research toward the creation and use of specialized decision support systems, providing the accumulation and use of data and knowledge in the subject area.

关键词： Decision support systems Asphalt Data analysis Costs Roads Laboratories Wheels

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Recognition of Analog signals of a Given Shape Using Continuous Processors

Recognition of Analog Signals of a Given Shape Using Continu...

引用

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

作者： N. L. Dembitskiy S. V. Polyakov A. V. Timoshenko Moscow Aviation Institute (National Research University) Moscow Russia JSC “Radiotechnical Institute named after academician A.L. Mintsa Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The article discusses the use of analogue neural processors to solve the problem of isolating a periodic radio signal from interference. The development goal is to achieve high performance hardware recognition of signals by trained neuro-like devices. It is proposed to perform signal isolation from interference without its digital conversion.

关键词： analog neuro-filter periodic signal noise neuro-processor selection signal interference Noise interference interference PERIODIC SIGNAL Recognition (Psychology) digital conversion ANALOG signals PROCESSOR RADIO signals signals

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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...

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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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Wideband signals Dispersion Distortions Optimum Tracking Compensator Based On Digital Filter Banks Using Farrow Filters

Wideband Signals Dispersion Distortions Optimum Tracking Com...

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

作者： V. I. Lipatkin E. O. Lobova N. A. Kandaurov Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The article proposes a computationally effective scheme of the dispersion distortions compensation device, based on a filter bank using the Farrow filter. The possibility of constructing a tracking compensator for dispersion distortions of broadband signals when transmitting them through the ionospheric channel is considered. The tracking compensator allows the estimation of dispersion distortions and their compensation. The results of simulation of the proposed algorithms are presented: the obtained estimate and the true value of the frequency dispersion parameters.

关键词： HF communication ionosphere dispersion distortion compensation nonlinear optimal filtering digital filter bank Farrow Filter Filter banks ionospheres broadband ionospheric channel Filters true value tracking compensating device signals

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Use of Flexible Payloads for Russian Communication and Broadcast Satellites

Use of Flexible Payloads for Russian Communication and Broad...

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

作者： E. A. Dyakova O. V. Mentus Space Systems Centre Radio Research and Development Institute (NIIIR) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

This article analyzes the global trends in satellite communications and broadcasting and discusses the use of Flexible payloads using multi-beam antennas with electronic forming of service areas for communication and broadcasting satellites in Russia. This approach allows you to use the satellite for almost any orbital position and to provide redundancy of companions in orbit in case of their failure. Satellites using multibeam antennas with electronic forming of service areas can be manufactured practically in series, and not for a specific orbital position.

关键词： satellite payload multi-beam antenna communication service area service areas multibeam antennas Payload satellites Communication Research Satellite communication Companions broadcasting Orbital Position

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Interoperability Application Package

Interoperability Application Package

引用

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

作者： G. V. Malshakov Moscow Aviation Institute National Research University Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

To simplify the solution of the problem of ensuring the ability to interact with ready-made software systems, the paper considers the creation of a set of interconnected modules as tool software. When developing a set of interconnected modules to ensure interaction between software systems at the physical level, it is proposed to use CALS technologies, at a logical level, a program for frequency data identification. The developed modules allow to reduce the time needed to create a single data warehouse using PDM technology and to ensure the interaction of software systems using standard CALS interfaces and a frequency data identification program.

关键词： interoperability application package STEP standard PDM technology CALS interfaces frequency data identification program EXPRESS language IDEF0 diagram software suite Interoperability Software systems Data warehousing

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Electric Propulsion System Simulation as Basis for the Electric Vehicle Digital Twin Development

Electric Propulsion System Simulation as Basis for the Elect...

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

作者： K. M. Sidorov A. G. Grishchenko B. N. Sidorov V.I. Stroganov Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

Given the current automobile industry development state and its outlined trends we can confidently assert that the intrinsic part of implemented technologies both in near and far future will comprise of powertrain electrification in order to aid low-carbon development, complex intellectualization of vehicles and associated infrastructure. Thus, aspects mentioned above explain the objective topicality for creation of an electric vehicle virtual copy, digital twin, based on electric vehicle components and systems simulation. This being said, simulation models as such, apart from traditional use in theoretical studies at the development stage, become part of a strictly practical application - real vehicle operation. The present article suggests a traction inverter with integrated charger simulation model implementation as a part of a complex electric vehicle propulsion system simulation. Basic equation systems are applied in presented complex simulation that are fundamental for component simulation model and presented as structural schemes for further software implementation. The article additionally focuses on recreation of a fast charger as part of a suggested traction inverter. The depicted simulation model allows recreation of electric propulsion system processes in a scope of electric vehicle operation modes.

关键词： Computational modeling Digital twin Propulsion Electric vehicles Inverters Software systems simulation

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