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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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Monitoring Anomalous States of Computer systems by Intellectual Analysis of Data of System Journals

Monitoring Anomalous States of Computer Systems by Intellect...

引用

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

作者： Sheluhin, O.I. Kostin, D.V. Gorodnichev, M.G. Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9781728147727

The ways and algorithms for automating the control of computer systems by intelligently analyzing unstructured data from system logs in order to detect and diagnose abnormal states are analyzed. This information is needed by the technical support service to localize the problem and accurately diagnose it. Because of the ever-increasing size of logs, intelligent analysis data models are being used to help developers extract system information. The research was conducted on a network infrastructure consisting of 6 hosts that make up a cluster under Rancher management. Expertly, events that significantly affect the system and are abnormal, related to problems with the passage of traffic on the network, or denial of service. Of the 988 message templates, 81 patterns are marked as abnormal. © 2020 IEEE.

关键词： Decision making

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Evaluation of the Efficiency of Blind Signal Separation in the Problem of Detecting BPSK signals

Evaluation of the Efficiency of Blind Signal Separation in t...

引用

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

作者： Liberovskiy, N.Yu. Chirov, D.S. Priputin, V.S. Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9780738130897

This paper investigates the effectiveness of the blind signal separation algorithm in the problem of detecting digital BPSK signals. The classical methods of blind separation of signals and criteria for signal independence are considered. A model of the studied algorithm for blind signal separation is shown, based on the calculation of a mixing matrix that brings the joint cumulants of the second and fourth orders to zero. To exclude a trivial solution, additional restrictions are imposed on signal dispersions. A system of equations for finding the mixing matrix coefficients is presented. The form of the coefficients of the mixing matrix is shown, which brings the signals to an uncorrelated form. The possibility of an analytical solution of the equation associated with the equality of the joint fourth-order cumulant to zero is shown. A model of modulation and detection of digital signals is described. The simulation result of the blind signal separation algorithm is presented graphically. The efficiency of the proposed algorithm is shown. © 2021 IEEE.

关键词： Blind source separation

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Restoration of Complex signals Distorted by Aliasing as a Result of Bandpass Sub-Nyquist Sampling

Restoration of Complex Signals Distorted by Aliasing as a Re...

引用

2023 systems of signals generating and processing in the field of on board communications, SOSG 2023

作者： Lesnikov, Vladislav Naumovich, Tatiana Chastikov, Alexander Metelyov, Alexander Vyatka State University Department of Radio Electronic Systems Kirov Russia

ISBN: (纸本)9798350397727

The purpose of this article is to develop a technique for recovering a complex signal distorted by aliasing as a result of sub-Nyquist bandpass sampling. The developed technique is based on the use of multichannel sampling. Its essence is that the signal is processed in several channels. All channels are analog-to-digital converted with different sampling rates, each of which leads to aliasing in its channel. For each channel, a system of equations is compiled that describes the corresponding aliasing. The joint solution of these systems of equations makes it possible to restore the distorted signal. Consideration in this article is limited only to first-order aliasing, in which no more than two aliases overlap at each frequency. This work is a continuation of the approach developed by the authors, called multichannel multirate sampling. © 2023 IEEE.

关键词： Restoration

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Measuring of Optical Signal to Noise Ratio in High-Speed Coherent Channels of Optical Transmission systems

Measuring of Optical Signal to Noise Ratio in High-Speed Coh...

引用

2024 systems of signals generating and processing in the field of on board communications, SOSG 2024

作者： Isaeva, L.N. Lobzov, A.V. Kogan, S.S. Moscow Technical University of Communications and Informatics Moscow Russia LLC «T8» St-Peterburg Russia

ISBN: (纸本)9798350383614

In this paper we discuss the methods for measuring optical signal to noise ratio (OSNR) in high-speed coherent channels of optical transmission systems. The following OSNR measurement methods are presented in this article: out-of-band without channel disabling (but such a method has its own limitations in the field of application) and in-band with or without disabling the optical channel. In-band or in-service methods of measuring of the OSNR in next generation optical dense wavelength division multiplexing (DWDM) systems with coherent optical channels, polarization multiplexing and quadrature amplitude modulation (QAM) format is still under discussion. This article states that it is preferable to calculate OSNR without disabling the optical channels based on an estimation of the correlation relationships between spectral components at predetermined pairs of spaced wavelengths. ©2024 IEEE.

关键词： Light transmission

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Analysis of Power Spectrums in Heart signals to Detect the Presence of Low-Amplitude High-Frequency Components

Analysis of Power Spectrums in Heart Signals to Detect the P...

引用

2023 systems of signals generating and processing in the field of on board communications, SOSG 2023

作者： Ryabov, D. Yu. Mukhametzyanov, O.A. Sedov, S.S. Shcherbakova, T.F. Kazan National Research Technical University Named after A. N. Tupolev - Kai Department of Radio-Electronic and Telecommunication Systems Kazan Russia

ISBN: (纸本)9798350397727

Purpose of this study is effective registration of low-amplitude high-frequency components with predictive value - ventricular late potentials (VLPs) - in electrocardiosignals (ECS) by Ist standard lead. 232 signals were preliminary evaluated to detect VLPs by Simson's method. VLPs were detected in 34 signals. Modification of signal-averaged approach was applicated to analyzed signals. Power spectrums of heartbeat signals' terminal part were analyzed in this study. Designed algorithm showed 82.75% of correct decisions. Originality: new parameter to detect VLPs by Ist standard lead lead was proposed. Parameter's threshold value is calculated. Threshold frequencies with maximal percentage of correct decisions were determined. Opportunity to detect VLPs in signals by Ist standard was evaluated: it is possible to detect VLPs using spectral analysis. Practical significance: results will be useful for ECS analysis block in telemedicine systems and onboard communications. © 2023 IEEE.

关键词： Spectrum analysis

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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

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

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

ISBN: (纸本)9781728147727

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. © 2020 IEEE.

关键词： Calibration

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Algorithm for Improving of Geo- Location Accuracy in Distributed Monitoring Mobile systems of Traffic Flow Characteristics

Algorithm for Improving of Geo- Location Accuracy in Distrib...

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

作者： Buslaev, D.A. Yashina, M.V. Tatashev, A.G. Susoev, N.P. PAO 'Radiophysics' Moscow Russia Moscow Technical University of Communications and Informatics Moscow Russia Moscow Automobile and Road Construction State Technical University Moscow Russia

Problems of accuracy of measurements on highway are considered. We have developed an algorithm for correlation analysis of the vehicle velocity. We have proposed an approach for measurement on highway. This approach d... 详细信息

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147727

关键词： info-communication technology traffic flow model GPS-track NMEA protocol correlation statistical analysis algorithms Flow models traffic flow characteristics Distributed monitoring positioning accuracy Freeway Correlation analysis Mobile

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Modeling of Nonlinear Distortions in 5G NR systems

Modeling of Nonlinear Distortions in 5G NR Systems

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

作者： Kulygin, S.V. Kazachkov, V.O. Moscow Aviation Institute National Research University Moscow Russia

ISBN: (纸本)9780738130897

Due to the peculiarities of the physical level of 5G NR (Fifth Generation New Radio) systems, nonlinear distortion of the amplifying path is one of the main negative affecting on the signal. Existing mathematical models of amplifier nonlinearities in the context of their application in the simulation of fifth-generation signals require adaptation. The work proposes the coefficients for nonlinear distortion of power amplifiers for Saleh and Ghorbani models. Based on the simulation model developed in MA TLAB, the spectral characteristics of the simulated processes of nonlinear distortion, amplitude-amplitude and amplitude-phase distortions, as well as the effect of nonlinearity on the noise immunity of the system (the dependence of the bit error rate (BER) from the signal-to-noise ratio (SNR)) for the 5G NR signal of the second numerology (200 MHz signal bandwidth) for all types of modulation supported by the standard on sub carrier frequencies (QPSK, 16QAM, 64QAM, 256QAM) are studied. © 2021 IEEE.

关键词： Bit error rate

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Combined Precoding Tehcnique with Antenna Selection for Massive MU-MIMO systems

Combined Precoding Tehcnique with Antenna Selection for Mass...

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

作者： Bakulin, M.G. Ben Rejeb, Taoufik Kreyndelin, V.B. Smirnov, A.E. Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (纸本)9780738130897

Frequency plan of the new standard of mobile communication systems 5G New Radio contain a large number of time division duplex bands. At the same time number of antennas in MIMO systems increases at the both sides on base station and on user equipment. The main goal of new technologies applying is to achieve high throughput according new enhanced mobile broadband scenarios: eMBB, uRLLC, mMTC. There are a lot of different methods for spatially signals processing, including precoding, beamforming, space-time codes, antenna selection. We proposed combined precoding technique with antenna selection, based on channel reciprocity principle, implemented in frequency bands with TDD mode. Proposed precoding technique with antenna selection can significantly increase the energy efficiency of multi-antenna systems with antenna configurations of the considered type, where user equipment has a large number of antennas. In addition, the proposed precoding algorithm has a low computational complexity and does not require the high efficiency feedback channel. © 2021 IEEE.

关键词： Antennas

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Adaptive Compensation for Interference under Radio signals Reception by the Multibeam Antenna System

Adaptive Compensation for Interference under Radio Signals R...

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

作者： Vorontsov, A.P. Maslov, M. Yu Bosomykin, D.V. Gavrilov, A.A. Federal State Unitary Enterprise Radio Research Development Institute FSUE NIIR Moscow Russia Head of the Center Samara Branch Federal State Unitary Enterprise Radio Research Development Institute FSUE NIIR Moscow Russia

ISBN: (纸本)9781728147727

The concept of organizing interference compensation when receiving a radio signal by the multipath antenna system is considered. Methods for improving the quality of radio signal reception in a complex interference environment with the definition of a promising method for use are considered and analyzed. Schemes for constructing a dish antenna system of a compensation antenna with the development of recommendations for construction are considered and analyzed. Variants of technical solutions for creating a broadband antenna feed are considered, an analysis of the results is carried out, and proposals for further research are formulated. © 2020 IEEE.

关键词： Antenna feeders

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