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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431-440 订阅

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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...

引用

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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Analysis of the Effect of Multiplicative Noise on the Patterns of Phased and Synthesized Antenna Arrays

Analysis of the Effect of Multiplicative Noise on the Patter...

引用

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

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

The influence of multiplicative noise on the directional patterns of phased and synthesized antenna arrays is analyzed. Multiplicative noise is regarded as a source of fast phase and amplitude distortion of signals received or radiated by the antenna. It is shown that multiplicative noise changes the multiplier of the array. Expressions of the directional pattern of the phased array exposed to multiplicative noise are obtained, taking into account the aperture distribution of phasing errors, as well as a generalized directional pattern of the array with phase shifters. The features of arrays with delay lines are described, and an expression for determining the directional pattern of such arrays is obtained. The features of synthesized antenna arrays are considered. The directional pattern of a focused antenna array under the influence of multiplicative noise is analyzed. Expressions for the directional pattern are obtained taking into account the time of the relative delay of signal reception relative to the central element of the array. It is shown that the obtained expressions for the phased antenna array and the array with phase shifters are also valid for synthesized antenna arrays.

关键词： Phased arrays Array signal processing Phase shifters Directive antennas Delay lines Radar antennas Aperture antennas

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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...

引用

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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Determining Channels Number in the Digital Filter Bank for the Wideband signals Dispersion Distortion Compensation

Determining Channels Number in the Digital Filter Bank for t...

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

作者： E. O. Lobova Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The article is devoted to determining the parameters of a dispersion distortion compensation device. Dispersion compensator device is based on digital filter bank, and main parameter needed to determine is number of channels. The article presents some theoretical results which bind a channel number and a quality of non-linear phase correction.

关键词： HF communication ionosphere dispersion distortion compensation digital filter bank ionospheres Filter banks Channel numbers broadband phase correction Banks abnormal shapes Filters Digit distortion compensating device dispersion compensator compensated Digital

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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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Assessment of Information Capacity of Compressed Video Sequences for Information Security systems

Assessment of Information Capacity of Compressed Video Seque...

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

作者： A. Komina K. Nezhivleva S. Votyakov N. Stepanov I. Vlasuyk Moscow Technical University of Communications and Informatics Moscow Russia

During the exponential increase in online video streaming services, the development of information concealment technologies directly depends on video encoding and is essential for video streaming companies. The structure of the video remains to contain areas invisible to humans and can be used to conceal prohibited content. Steganography is a science exploring various methods of hiding information in multimedia objects, which should remain undetectable both statistically and for human perception. A large variety of video content can be used as a container to conceal information from unauthorized viewers. To solve this problem, the current research focus is on finding areas, where information can be hidden, or, in other words, areas inaccessible to human perception. The conference work proposes a new method and hardware-software system for creating a new assessment of the information capacity of compressed video sequences for information security systems, which would allow providing recommendations for the protection and detection of prohibited information in the network.

关键词： Steganography TV Limiting Video sequences Information security Streaming media Visual systems

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Design Features of the On-board Complex for Image Recognition Tasks in Driver Assistance systems (DAS)

Design Features of the On-Board Complex for Image Recognitio...

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

作者： M. S. Moseva M. V. Yashina E. A. Nosov Moscow Technical University of Communications and Informatics Moscow Russia Moscow Automobile and Road Construction State Technical University Moscow Russia

This research is focused on analysis of modern methods of detecting and recognizing objects in the transport area. An active monitoring method for detecting vehicles on video stream is proposed and the requirements fo... 详细信息

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

关键词： driver assistant systems traffic flow monitoring pattern recognition computer vision vehicle detecting traffic problems images computer vision Pattern recognition TRANSPORT fieldS Driver Assistance systems Image recognition design features defensive aids suite amsonic acid

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Autonomous Vehicles Safety Provision Before and During Operation on Public Roads

Autonomous Vehicles Safety Provision Before and During Opera...

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

作者： S. S. Shadrin A. M. Ivanov D. A. Makarova Yu. M. Furletov Moscow Automobile and Road Construction State Technical University (MADI) Moscow Russia

The article analyzes the admission process, as well as the procedure and composition of the required reporting on the operation of autonomous vehicles in Russia, the USA, and the countries of the European Union. The methods and relevant standards used by advanced developers of autonomous vehicles to ensure safety are described. Approaches to ensuring the safety of a highly automated vehicle developed by 'BaseTracK Rus' LLC are presented. The results of experimental operation of the developed highly automated vehicle on public roads are analyzed. Based on the comprehensive analysis, an approach is proposed to assess and improve the safety level of autonomous vehicles during operation, which will allow achieving a high level of safety before implementation on public roads, timely identify problems with the current version of the software and hardware of the automated control system during operation and effectively generate requests for improvements and improvements of the developed solutions for improving system performance, reliability and, accordingly, safety.

关键词： Roads System performance Europe Control systems Software Hardware Safety

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Measuring Far-field Radiation Patterns of Digital Beamforming Antenna Arrays

Measuring Far-Field Radiation Patterns of Digital Beamformin...

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

作者： V. I. Djigan Department of Integrated Circuits Design Methodology Institute for Design Problems in Microelectronics of RAS Moscow Russia

A method of the antenna array far-field Radiation Pattern (RP) measurement is considered. This method is designed for the usage with the receiving Digital Beamforming Antenna Arrays (DBAA). Such type of antenna arrays typically does not have a radiofrequency output. Hence, the standard methods of the RP measurement, based on the radiation and the reception of the monochromatic probing signal, cannot be used for the DBAA RP measurement. The proposed method assumes the radiation of a probing signal modulated by a pseudo-noise sequence and the base-band processing of the DBAA output signal by means of a matched filter or a correlator. The paper presents the description of the measurement setup and the mathematical explanation of the measuring procedure. It has been shown that the accuracy of the RP measurement depends on the Signal-to-Noise Ratio (SNR) at the outputs of the DBAA channel receivers, the number of the array channels and the number of the pseudo-noise sequence symbols. The accuracy increases on 3 dB each time as the number of the array antennas or the pseudo-noise sequence symbols is doubled. This result is confirmed by the simulation of the RP measurement of the eight and the sixteen channel linear antenna arrays with the usage of the maximum length pseudo-noise sequence of 1023 and 2047 symbols.

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