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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"

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Peculiarities of Instantaneous Frequency and Envelope of CFSKn-n-Signal in the Channel with Memory

Peculiarities of Instantaneous Frequency and Envelope of CFS...

引用

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

作者： R. R. Fayzullin I. M. Lerner V. L. Odintsov V.I. Il'in G. A. Garifullina Kazan National Research Technical University n.a. A.N. Tupolev - KAI (KNRTU-KAI) Kazan Russia Kazan (Volga region) Federal University Kazan Russia Kazan National Research Technological University Kazan Russia

The article is dedicated to the study of peculiarities of the behavior of the envelope and instantaneous frequency of the CFSK-n-signal at the output of channel with memory caused by it frequency selective properties. New properties and phenomena are revealed that allow to increase the efficiency of communication systems with this type of signals, built on the basis of the theory of resolution time.

关键词： Time-frequency analysis Communication systems Memory management Signal resolution

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Applying Blind Signal processing Methods in Data-Transmission systems

Applying Blind Signal Processing Methods in Data-Transmissio...

引用

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

作者： P. S. Tyapkin N. A. Vazhenin Moscow Aviation Institute (National Research University) Moscow Russia

The problem of increasing the noise-proof feature of communication systems, along with increasing the communication channel capacity, is currently important. In many areas of wireless engineering (in radiolocation and communications for example), it becomes necessary to receive and process signals, some characteristics of which (for example, amplitude, frequency, or initial phase) are unknown. Methods of statistical radio engineering, as well as algorithms for blind signal processing, can be used to eliminate a priori uncertainty. The problem of comparative analysis of some common algorithms for blind signal processing in the tasks of separating radio signals from mixtures with interference and noise was considered. In the study, the algorithms JADE, FastICA, SOBI and AMUSE were considered. Amplitude-, frequency- and phase-shift keyed signals against the background of additive noise, impulse noise and cochannel noise were considered as useful signals. Based on the results of simulation modeling, the effectiveness of these algorithms is compared when distinguishing between several types of signals in the presence of various types of interference. The above research results can be useful when choosing a blind processing algorithm for subsequent practical application.

关键词： Wireless communication Interference suppression Uncertainty Transmitting antennas Signal processing algorithms Receiving antennas Signal processing

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Spline Signal Generators for a Given Form on Continual Processors

Spline Signal Generators for a Given Form on Continual Proce...

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

作者： Nikolay Dembitskiy Moscow Aviation Institute (National Research University) Moscow Russia

The article discusses the use of continuous processors to generate analog signals of a given shape in a continuous time interval. The purpose of the development is to create built-in devices for monitoring signal parameters for radio engineering systems. The main element of the generator is an analog function interpolator controlled by continuous processors. The generator's operation is based on the approximation of signal functions by its tabulated values. The signal is synthesized at conjugate time intervals by the method of forming a spline model of the function. To calculate the spline coordinates, the polynomials of Newton, Bessel and Stirling are used. The proposed approach makes it possible to create small-sized devices for synthesizing signals of a given shape using analog elements.

关键词： Program processors Shape Computational modeling Process control Signal generators Control systems Generators

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Features of Converting signals to Binary and Minimizing Distortion

Features of Converting Signals to Binary and Minimizing Dist...

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

作者： A. S. Adzhemov A. Y. Kudryashova Moscow Technical University of Communications and Informatics Moscow Russia

A well-known complex of methods for converting signals into binary digital form is shown, potential theoretically achievable boundaries of such conversions are determined. Values are calculated that indicate the value of the code distance between the original values and those obtained after transformation. Euclidean space metric. A correspondence is established between these messages and binary code combinations in the Hamming space. It is proved that in some cases the values that determine the distance between messages and the metric are quite general and should be clarified for specific situations. Distortion minimization is suitable for cases where the minimum code distances of the primary metric space are related to the minimum code distances of the secondary metric space. And also in the article the admissible limits of such minimization are found.

关键词： Binary codes Distortion Minimization Extraterrestrial measurements Entropy Optimization

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Impact of Vehicles and Motorcycles on the Environment and "Smart City" as a way to Solve Transportation Problems of a Megapolis

Impact of Vehicles and Motorcycles on the Environment and "S...

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

作者： V. V. Gaevskiy A. M. Ivanov Ghith Sater Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

This article examines the consequences of a large number of vehicles and their impact on the environment and creating a smart city to solve the transport problems of the megapolis. During the study, it was found out that at the moment the most dangerous impact from the car on the environment are: the consequences of an accident; emissions of harmful substances; thermal effects; noise; vibration; wear products; problems of recycling. One of the ways to solve the problem of environmental pollution can be the development of recuperation energy in road transport.

关键词： Vibrations Smart cities Roads Motorcycles Transportation Hybrid power systems Thermal noise

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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...

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

作者： Kh. A. Dzhabrailov M. E. Chantieva R. A. Gematudinov A. V. Ilyukhin I. V. Safyanov Moscow Automobile and Road Construction State Technical University (MADI) Moscow Technical University of Communications and Informatics Moscow Russia Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

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.

关键词： Weight measurement Roads Tire pressure Wheels Process control Quality control Control systems

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Diagnostics of Controlled Discrete-Nonlinear Dmitriev-Kislov System by Fractional Power Spectra

Diagnostics of Controlled Discrete-Nonlinear Dmitriev-Kislov...

引用

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

作者： V.V. Afanasiev S. S. Loginov Kazan National Research Technical University named after A. N. Tupolev - KAI Kazan Russia

ISBN: (纸本)9781665415484;9781665446983

The features of diagnostics of a controlled multimode discrete-nonlinear Dmitriev-Kislov system based on the non-harmonic spectra of the generated signals are considered. Serial and parallel analyzers of fractional-power spectra based on selective suppression of signal components using fractional order differentiation and integration are proposed and compared. The multidimensional non-harmonic fractional-power spectra of signals of the discrete-nonlinear Dmitriev-Kislov system are investigated. An approach has been developed in the diagnostics of a controlled discrete-nonlinear system Dmitriev-Kislov, modified by control actions on the parameters of time sampling, based on fractional-power spectra of the generated 3-D signals.

关键词： Correlation Chaotic communication Modulation Control systems Random processes Nonlinear dynamical systems Spectral analysis

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The Autonomous Object Trajectory Correction Using Neural Networks

The Autonomous Object Trajectory Correction Using Neural Net...

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

作者： Z. V. Ilyichenkova S. M. Ivanova A. I. Volkov A. Yu. Ermakova MIREA - Russian Technological University Moscow Russia Moscow Technical University of Communications and Informatics Moscow Russia

The issue of using neural networks to construct and correct the transport object trajectory is considered in this article. The control system, which includes the analysis of general unchangeable information received from global sensors, is considered. The decision on the need to change the trajectory is made depending on the data received from sensors located directly on the object. A method is proposed for correcting the autonomous object route depending on the occurrence of stationary obstacles during movement. A neural network is defined that minimizes the functional characterizing the cost of movement and its safety, taking into account the rebuilding.

关键词： Neural networks Sensor phenomena and characterization Control systems Sensor systems Trajectory Safety

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Interference Compensator for Communication systems with Space-Time Coding

Interference Compensator for Communication Systems with Spac...

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

作者： S. A. Samoylov A. G. Samoylov S. A. Nasir I. A. Al Tahar Vladimir State University named after Alexander and Nikolai Stoletovs Vladimir Russia Iraqi Technological University Vladimir State University named after Alexander and Nikolai Stoletovs Vladimir Russia

ISBN: (纸本)9781665415484;9781665446983

The known methods of signal processing of information transmission systems with space-time coding are quite successful in combating signal fading. However, these methods do not reduce the influence of external interference signals correlated in different reception channels. The article proposes a method for compensating external interference to systems with space diversity. The structure of the interference compensator is described. The method has been experimentally investigated. The experiments used a communication system with 2x space diversity. The proposed interference compensator showed the ability to suppress external narrow-band radio interference by at least 40 dB, and broadband barriers by 15 dB.

关键词： Fading channels Spatial diversity Electromagnetic interference Information processing Encoding Broadband communication

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Method of Receiving-Transmitting Module Testability for Radar with Active Electronically Scanned Antenna

Method of Receiving-Transmitting Module Testability for Rada...

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

作者： A. M. Matveev I. V. Petrov M. N. Ushkar Moscow Aviation Institute National Research University Moscow Russia

ISBN: (纸本)9781665415484;9781665446983

The principle of monitoring the technical state and the structure of a receiving-transmitting module with a closed loop of end-to-end verification of the transmitting and receiving channels by branching the signal from the output of the transmitting channel to the input of the receiving channel in the time interval when the reflected signal is not received are proposed. The advantages, disadvantages and limitations of alternative options for organizing end-to-end test monitoring from the input to the output of transceiver module of an active electronically scanned array due to the use of passive and active elements in the control loop are shown.

关键词： Resistors Transmitting antennas Receiving antennas Microstrip antennas Radar antennas Control systems Transceivers

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