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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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Methods of Laboratory Testing of Radiometrics of Space Monitoring systems for Mobile Objects

Methods of Laboratory Testing of Radiometrics of Space Monit...

引用

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

作者： V. V. Ionov A. V. Pestryakov Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

This article proposes a methodology for verifying the operability and compliance with regulatory documents of radio beacon of the space monitoring system of moving objects Argos. This technique is based on many years of experience in the development of such radio beacon. In addition, the graphs necessary for the analysis of the output signal are presented, among them the graphs of phase change, power and spectral characteristics, etc.

关键词： radio beacon space monitoring Argos laboratory tests methodology Radio beacons laboratory procedure space monitor monitoring systems outgoing signal methodology

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Monitoring of RF-field Strength in the Environment by Mobile Telecommunications in the Moscow

Monitoring of RF-Field Strength in the Environment by Mobile...

引用

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

作者： A. A. Yelizarov D. M. Ikonnikova A. I. Katsnelson P. I. Gromova D. S. Ilyanova National Research University «Higher School of Economics» Moscow Russia

The growing popularity and use of the wireless Internet of Things and cyber-physical systems increase the demand for "green" technologies in the field of mobile telecommunications. To be completely wireless, such devices need an integrated RF energy harvesting system that ensures efficient recharging of the batteries and accumulators used in them. This article provides an assessment of the coverage areas of mobile operators in Moscow and the Moscow region by the frequency ranges used, taking into account the power distribution. An experimental study of the RF-field strength of telecommunication equipment was carried out using a log periodic antenna (KM6-600/6000) with linear polarization and a portable spectrum analyzer with an Arinst SSA-TG R2 tracking generator. The results of attenuation of electromagnetic waves of GSM and Wi-Fi bands under various environmental conditions are obtained, which is of interest for the development of effective intelligent harvesting systems.

关键词： Radio frequency GSM Electromagnetic scattering Power distribution Mobile antennas Attenuation Generators

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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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Microwave Photonic Sensing for Temperature Monitoring of On-board Photovoltaic Panels

Microwave Photonic Sensing for Temperature Monitoring of On-...

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

作者： O. G. Morozov A. Zh. Sakhabutdinov D. N. Matveev I. I. Nureev K. A. Khodjanepesov Kazan National Research Technical University named after A.N. Tupolev-KAI Kazan Russia Institute of Telecommunications and Informatics of Turkmenistan Ashgabat Turkmenistan

The development and use of on-board photovoltaic panels (PVP) makes it possible to improve the energy supply of unmanned or manned aerial vehicles, which are respectively positioned, for example, as flying base stations or vehicles with on-board batteries with a large energy reserve, capable of carrying more payload during long flights. The efficiency of a photovoltaic element (PVE) is seriously affected by clouds, blocking solar radiation, possible contamination or precipitation accumulated on its protective coating, aging of the PVE material, and the most important parameter - temperature. The aging effects and to a greater extent their temperature, affect the current-voltage characteristics of the PVE, so an on-board measurement system for its performance parameters can provide valuable information for optimizing the power generation process. The article proposes a methodology for monitoring the temperature of PVE and PVP in whole, which provides determination of their temperature over an area based on networks of fiber-optic sensors (FOS) and their addressed interrogation using a microwave-photonic approach.

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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...

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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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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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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...

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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...

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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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The Concept of Program-Modeling Complex in order to Create a System of Anti-Jamming Satellite communications systems (Radio Links to “Earth-Spacecraft”)

The Concept of Program-Modeling Complex in order to Create a...

引用

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

作者： V. V. Prikhodko Specialist JSC SPC Vigstar Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The work examines the construction of program-modeling complex (PMC) in relation Fto the establishment and operation of an integrated system of anti-jamming (ISA) of the radio links of the “Earth-spacecraft”. ISA consists of a broadband communication system (based on signals from the RF and noise-resistant codes) and a system of spatial filtering of signals (based on a multi-beam antenna and adaptive noise compensators. The methodology of construction of PMK on the basis of the maximum strategy of decision-making is given.

关键词： frequency hopping adaptive compensators interference system of a spatial filtration of signals repeater adaptive compensators interference ISA PMC ACI Maximum strategy Frequency hopping Repeater Device Component PARAMYOTONIA CONGENITA OF VON EULENBURG Automatic car identification Radio links Antijamming broadband PMVK gene Satellite communication systems signals spatial filtering

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