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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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About One Cloud Computing Simulation Model

About One Cloud Computing Simulation Model

引用

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

作者： P. E. Golosov I. M. Gostev Moscow Russia The Institute for Information Transmission Problems (Kharkevich institute) Moscow Russia

Today, the use of cloud resources is becoming increasingly popular. On the one hand, it is mere data storage and their respective sharing by a number of users, on the other hand, it is the opportunities that open up following large computing resources available “in the cloud”. An important aspect is the hash function search technologies and adjusting approaches to managing computing resources due to the specifics of their service algorithms. The article considers a simulation model for a computational process built in the Simulink environment (SimEvent) and based on the queueing theory of a G/G/n/inf. system with a set of input streams, an infinite queue, two feedbacks formed by re-processing a request in case of a device failure, and because of the possibility of an extranonce situation and its handling. The results of modeling are considered for different input flows - deterministic, uniformly distributed, Poisson and exponential, with different service disciplines and different laws of processing requests in the queue. The advantages and disadvantages of the proposed model are analyzed in comparison with the well-known methods of controlling input streams (scheduling tasks in operating systems).

关键词： Cloud computing Software packages Processor scheduling Computational modeling Operating systems Memory Mathematical model

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Methodology for Evaluating the Probability of Communication Disconnection in Radio Channels of the systems with Space-Time Coding of Signal

Methodology for Evaluating the Probability of Communication ...

引用

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

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

The paper presents a methodology for assessing the probability of communication disruptions in one beam of a radio communication system operating on the technology of space-time coding of signals. Expressions are given for an accurate and for an approximate estimate of the probability of communication disruptions in radio channels with multipath and signal fading. Long-term experimental studies of signal fading on a long-range tropospheric radio link have been carried out. It has been experimentally proven that the Rayleigh description of interference fading in multipath propagation of signals is observed in 60% of the time of communication sessions. For the rest of the communication sessions, other laws of probability distribution are observed. It is confirmed that they, together with Rayleigh's description of fading, are special cases of the four-parameter law of probability distribution. Convenient for practical use formulas are obtained for estimating the noise immunity of a communication channel. The graphs of the dependence of the probability of communication failure on the ratio of the average received signal power and the threshold level of the receiver signal are given.

关键词： Channel estimation Rayleigh channels Receivers Interference Radio links Probability distribution Encoding

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Modeling of Nonlinear Distortions in 5G NR systems

Modeling of Nonlinear Distortions in 5G NR Systems

引用

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

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

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.

关键词： Adaptation models Phase shift keying Nonlinear distortion Bit error rate Power amplifiers New Radio Mathematical model

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Influence of Auxiliary Braking systems on Deceleration of Vehicles of Category M1

Influence of Auxiliary Braking Systems on Deceleration of Ve...

引用

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

作者： I. S. Gladushevskiy A. V. Terentyev S. S. Evtyukov D. B. Efimenko Saint Petersburg State University of Architecture and Civil Engineering St. Petersburg Russia Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

The auxiliary braking systems of vehicles of category M1, installed from the factory and affecting deceleration, are considered. Comparison of the results of steady-state deceleration on dry asphalt concrete pavement at an air temperature of +17 ± 0,5°C will be carried out. For further experimental studies, factors and systems will be identified. Studies have shown that auxiliary systems affect the stability of deceleration and its magnitude. Comparison of vehicle deceleration with different blocks of auxiliary systems is made. The influence of developing auxiliary systems allows for a shorter braking distance, improved braking stability and an increased deceleration value. Keywords-brake system, ABS, braking, car component, smart system.

关键词： Temperature Asphalt Production facilities Steady-state Brakes Automobiles Thermal stability

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Bit Error Rate Performance of Power Domain Non-Orthogonal Multiple Access systems

Bit Error Rate Performance of Power Domain Non-Orthogonal Mu...

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

作者： V. O. Kazachkov N. A. Soldatenkova Moscow Aviation Institute (National Research University) Moscow Russia

Article focuses at research Bit Error Rate (BER) for Orthogonal Frequency-Division Multiple Access (OFDMA) infocommunication system with Power-Domain Non-Orthogonal Multiple Access (PD-NOMA) for two user equipments. Developed imitation model in MATLAB/Simulink environment with Symbol Level - Successive Interference Cancellation (SL-SIC) is presented. Simulation parameters are equivalent of downlink 5G New Radio (5G NR) standard by 3GPP for second numerology with Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM) with order M = 16, 64, 256 on subcarriers. Presented dependencies BER from Signal-to-Noise Ratio (SNR) for different levels mean power of signals on subcarriers for Additive White Gaussian Noise (AWGN) channel. All presented results received for sample size providing confidence level no lower 90% and relative accuracy no more 10%.

关键词： AWGN channels NOMA Interference cancellation Quadrature amplitude modulation Bit error rate Tools Downlink

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Multi-Sensory Strain Measurement Using Addressed Fiber Bragg Structures in Load Sensing Bearings

Multi-Sensory Strain Measurement Using Addressed Fiber Bragg...

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

作者： T. A. Agliullin R. R. Gubaidullin A. Zh. Sakhabutdinov Kazan National Research Technical University named after A.N. Tupolev-KAI Kazan Russia

The work presents modeling results of the fiber-optic multi-sensory strain measurement system for load sensing wheel hub bearings based on the addressed fiber Bragg structures (AFBS) with two symmetrical phase shifts. The system includes six strain sensors attached to the outer ring of the bearing and one senor isolated from strain for temperature compensation. The results of the numerical modeling are presented, as well as the simulation results of a complete optoelectronic interrogation scheme, which confirm the high accuracy of the AFBS central wavelengths determination by means of the microwave-photonic interrogation approach. The proposed load-sensing bearings can be used to estimate of the loads acting on the wheels of the vehicle, which serve as input parameters for active safety systems or fully automated driving, in order to enhance their effectiveness and safety of the vehicle.

关键词： Optical fiber sensors Wheels Strain measurement Optical fiber communication Sensor systems Sensors Numerical models

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Comparison of Energy Metrics and Levels of Passive Interference for UWB Radars With Radio and Video Pulse Probing signals

Comparison of Energy Metrics and Levels of Passive Interfere...

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

作者： V. N. Skosyrev V. M. Nuzhdin P. V. Sokolov A. N. Kharlamov Moscow State Technical University named after N.E. Bauman (National Research University) Moscow Russia Moscow Aviation Institute (National Research University) Moscow Russia

signals properties comparative analysis is carried out for ultra-wideband pulse radar probing signals, which have equal spatial resolution and duration, but differ by presence or absence of high frequency filling. The broadband factor is used, defined as the relation of the probing signal bandwidth to its spectrum average frequency. Signal-to-noise and signal-to-passive interference ratios dependences on the broadband coefficient are obtained. It is shown that for the same antenna system aperture, dimensions and radiation power, the signal-to-noise ratio in a radar with a radio-pulse probing signal will be higher. That benefit is inversely proportional to the broadband factor square. Assuming that the passive interference level is proportional to the selection element area, its estimation is obtained. It is shown that when the spectral bands of ultrashort video and radio pulse probing signals are equal, the pulse with high-frequency filling has an advantage, in terms of the considered parameters.

关键词： Airborne radar Interference Radar antennas Filling Broadband communication Broadband antennas Optical pulse generation

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Algorithm for Building a Cluster for Implementing the “Memory as a Service” Service in the IoT Concept

Algorithm for Building a Cluster for Implementing the “Memo...

引用

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

作者： D. V. Gadasin A. V. Koltsova D. D. Gadasin Moscow Technical University of Communications and Informatics Moscow Russia Tomilinskaya SES N№ 19 Moscow Russia

In the next 5 years, the total amount of data transmitted from devices is likely to exceed the limit of 160 zettabytes, which is more than 3 times higher than the current value. As the volume of information increases, the volume of traffic also increases, so the possibility of maintaining a stable network operation is seen in the further deepening of virtualization, the transition from cloud to foggy computing and dew computing. The introduction of fog computing technology leads to changes in the algorithms of information transmission, processing and storage technologies, which allows users to receive new types of services at a new level, and the main scope of fog computing technology is the Internet of things. This paper examines the issues of building a cluster model designed for one of the types of boundary computing - the concept of dew computing. It involves user interaction with an electronic device, including the emergence of a new concept based on the emergence of an environment in which it is possible to lease memory on a device owned by another user-memory as a service.

关键词： Road transportation Cloud computing Spirals Computational modeling Real-time systems Trajectory Internet of Things

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Detection of signals with a Random Moment of Occurrence Using the Cumulative Sum Algorithm

Detection of Signals with a Random Moment of Occurrence Usin...

引用

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

作者： V. I. Volovach V. M. Artyushenko Volga Region State University of Service Togliatty Russia Technological University Korolev Russia

A method for detecting signals with a random moment of occurrence based on the algorithm of cumulative sums with a reflecting screen under the influence of non-Gaussian noise is presented. An example of detecting a signal exposed to non-Gaussian quasi-deterministic additive noise is used for obtaining the dependences of the probability of false detection on the value of the signal-to-noise ratio for different values of the detection threshold. An increase in the detection threshold value, as well as the value of the signal-to-noise ratio, leads to a decrease in the probability of false detection. It is shown that the case of coordinated noise has the highest probability of correct detection. The algorithm for detecting a signal against the background of pulse noise and fluctuating non-Gaussian noise is analyzed and curves for probability of correct detection are obtained. It is found that the mismatch of the cumulative sum algorithm and the real density of probability distribution of noise leads to a decrease in the probability of correct detection. It is shown that the cumulative sum algorithm allows not only to solve the problem of detecting a signal in real time, but is also simple enough to be used when solving some practical problems.

关键词： Additive noise Additives Real-time systems Probability distribution Signal detection Signal to noise ratio

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Methods of Detecting Latent Defects in Cells of the Super-Operative Memory of Microcircuits Used in the Digital Signal processing systems

Methods of Detecting Latent Defects in Cells of the Super-Op...

引用

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

作者： Smirnov, K.K. Ushkar, M.N. Nazarov, A.V. Blinov, V.V. Moscow Aviation Institute National Research University Scientific Research Institute of System Analysis Moscow Russia Moscow Aviation Institute National Research University Moscow Russia Scientific Research Institute of System Analysis Moscow Russia

ISBN: (纸本)9781728147727

The article reveals the reasons for the low efficiency of modern methods for detecting latent defects in the chips of super operative memory (further, memory chips) used in digital signal processing systems. The first reason is due to the constant decline in technological design standards. The second reason is that modern systems of functional testing the memory chips are not able to detect latent defects in the chips in real time. As a third reason, we can point out the insufficient effectiveness of modern 'marching' tests, which are widely used for testing memory chips. In this paper, we propose a complex approach to organizing memory chips testing. The main idea this approach is supporting a close relationship is maintained between the mathematical and topological models of the tested chip. It is this connection that eliminates the first two of the above reasons for the low efficiency of memory chips testing methods. The hardware-software complex, that implements this approach, ensures the maintenance of a unified information environment based on the original hardware-oriented programming language STeeL. To eliminate the third reason mentioned above, a special component 'Memory' was implemented as part of complex, which, unlike the well-known implementations, allows you to create functional tests of any complexity. This component implements the version of the 'marching' test, which is a short dynamic memory test based on statistics from previous tests. The latter circumstance significantly reduces the total time spent on testing chips. © 2020 IEEE.

关键词： Efficiency

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