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检索条件"任意字段=Systems of Signals Generating and Processing in the Field of on Board Communications"

共 238 条记录，以下是211-220 订阅

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Research of an Ultra-Wideband Distributed Amplifier Based on field-Effect Transistors

Research of an Ultra-Wideband Distributed Amplifier Based on...

引用

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

作者： N. D. Shmakov R. Yu. Ivanyushkin Moscow Technical University of Communications and Informatics Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The main tasks are discussed in this paper such as in the construction of transmitters of digital television broadcasting, in particular the task of constructing a universal preamplifier, which can be used regardless of any particular channel. Distributed amplifiers permit to build wide-range power amplifiers with constant gain in the preset frequency range. The main feature of the construction of distributed amplifiers is using input and output capacitances of amplifying device in the artificial transmission lines. The main advantages and disadvantages of this type of amplifiers are presented in the paper. The method of calculation of distributed amplifier for UHF and the research its energetic characteristics are discussed in the paper. The further research tasks for this type of amplifier are given.

关键词： Distributed amplifier traveling wave amplifier field-effect transistor energy characteristics methods of calculation an amplifier 3rd order LPF links artificial long lines AM-AM characteristic AM-PM characteristic nonlinear distortions distributed amplifiers field effect transistors energy characteristics Amplifiers travelling wave amplifiers Ultra wideband technologies Nonlinear distortion digital video broadcasting computational methods

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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

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

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

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

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.

关键词： calibration planar scanner measurement error anechoic chamber Anechoic chambers Error measure Antenna measurements Calibration Scanner Planar Amplitude Phase shifters

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Synchronous Methods of BPSK Signal Generation

Synchronous Methods of BPSK Signal Generation

引用

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

作者： V. E. Martirosov G. A. Alekseev Moscow Aviation Institute (National Research University) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The description and research results of characteristics of the patented by the authors BPSK signal shaper based on the globally linearized synchronization system (GLSS) are presented. GLSS is a phase locked loop (PLL) system with an unconventional structure optimized for speed in transient operation mode in accordance with the Pontryagin maximum principle. The structural algorithm of shaper provides the implementation of binary phase manipulation by the method of sequentially synchronizing system at neighboring points of stable equilibrium located on the phase portrait of GLSS, in contrast to traditional PLL, with a period of π radians. With using simulation program methods illustrate the possibilities of generating a BPSK signal directly at a carrier frequency of 6.4 GHz, with an information transfer rate of 300 Mbit/s. The obtained results indicate the promise of using a synchronous BPSK signal shaper based on GLSS in applications requiring high values of information transfer rates and signals shaping in the microwave range at the operating frequency of the infocommunication system, under conditions when the programmable element base is no longer applicable.

关键词： BPSK signal modulator high-speed synchronous technologies signals shaping directly in the microwave range of the operating frequencies Binary phase shift keying information transfer rate Shapers microwave range Phase diagrams Phase locked loops signals maximum principle patenting operating frequency CARRIER FREQUENCY Prolymphocytic Leukemia Outcomes Research

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Blockchain Models to Improve the Service Security on board communications

Blockchain Models to Improve the Service Security on Board C...

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

作者： A. G. Vladyko A. V. Spirkina V. S. Elagin I. A. Belozertsev E. A. Aptrieva The Bonch-Bruevich Saint-Petersburg State University of Telecommunications Saint Petersburg Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The present article introduces a definition of Blockchain, describes services implemented by this technology and the field of its application. The authors identify the main technical characteristics and their features associated with data transmission through the network. This article provides the operation principles of Blockchain technology and a block structure. The authors determine the network scheme working with blockchain transactions and the dependence of network characteristics on application parameters. The security aspects of data transmission within Blockchain technology are analyzed as well. The types of network attacks and Blockchain devices are listed in the article. In addition, the authors propose a Blockchain traffic identification model that allows discrediting the existing security mechanisms of this technology and makes services vulnerable to these attacks. Furthermore, the article offers recommendations on hiding the Blockchain traffic profile, which will significantly complicate its identification on the data network.

关键词： Blockchain distributed registry security data protection network computer information security Data Security DADANET Security data transmission technical features network characteristic computer network attack Legal Services Network

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

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

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

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.

关键词： multibeam antenna system adaptive compensation for interference interference compensation methods spatial interference filtering dish antenna system type of antenna system feed RADIO signals adaptive compensation reception multibeam antennas interference Radio ANTENNA SYSTEM interference signal reception

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Cyclostationary Evaluation of Voltage Crosstalk Between PCB's Transmission Lines

Cyclostationary Evaluation of Voltage Crosstalk Between PCB'...

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

作者： A. B. Baev Yu. V. Kuznetsov M. A. Konovalyuk A. A. Gorbunova M. Nuzhnov Moscow Aviation Institute (National Research University) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

Theoretical and experimental evaluation of the crosstalk between transmission lines of the printed circuit boards (PCB) induced by the electromagnetic interference emitted by the random signals with cyclostationary properties are presented. The quantitative analysis of the crosstalk between two adjacent lines was evaluated by the bit error ratio (BER) of the communication link. The interference signal measured by the real time digital oscilloscope was characterized as a cyclostationary stochastic process. The cyclic averaging of the induced interference reveals the instantaneous periodic power corresponding to the variance of the probability density function (PDF). The PDF was obtained from the amplitude histograms constructed for each instant of time over the bit duration. Experimental evaluation of the BER for the communication link influenced by the voltage crosstalk was performed.

关键词： stochastic processes time-domain analysis electromagnetic interference electromagnetic compatibility Electromagnetic interference Time domain analysis electromagnetic compatibility Markov chain crosstalk Telecommunication links Bit error rate Stochastic Processes Transmission Lines Polychlorinated Biphenyls Inductive interference Power cables Printed Circuit board Device Component interfering signal RANDOM signals

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Near-field Measurement System for the Upper Mid-Band 58

Near-Field Measurement System for the Upper Mid-Band

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58th Asilomar Conference on signals, systems and Computers, ACSSC 2024

作者： Rasteh, Ali Hari, Raghavendra Palayam Guo, Hao Mezzavilla, Marco Rangan, Sundeep Tandon School of Engineering New York University BrooklynNY United States Chalmers University of Technology Department of Electrical Engineering Gothenburg Sweden Milan Italy

ISBN: (纸本)9798350354058

The upper mid-band (or FR3, spanning 6-24 GHz) is a crucial frequency range for next-generation mobile networks, offering a favorable balance between coverage and spectrum efficiency. From another perspective, the systems operating in the near-field in both indoor environment and outdoor environments can support line-of-sight multiple input multiple output (MIMO) communications and be beneficial from the FR3 bands. In this paper, a novel method is proposed to measure the near-field parameters leveraging a recently developed reflection model where the near-field paths can be described by their image points. We show that these image points can be accurately estimated via triangulation from multiple measurements with a small number of antennas in each measurement, thus affording a low-cost procedure for near-field multi-path parameter extraction. A preliminary experimental apparatus is presented comprising 2 transmit and 2 receive antennas mounted on a linear track to measure the 2 × 2 MIMO channel at various displacements. The system uses a recently-developed wideband radio frequency (RF) transceiver board with fast frequency switching, an FPGA for fast baseband processing, and a new parameter extraction method to recover paths and spherical characteristics from the multiple 2 × 2 measurements. © 2024 IEEE.

关键词： Receiving antennas

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S-band Radar Based on Lyrtech Software Defined Radio

S-band Radar Based on Lyrtech Software Defined Radio

引用

IEEE National Aerospace and Electronics Conference (NAECON)

作者： Cao, Siyang Zheng, Yuan F. Ewing, Robert L. Ohio State Univ Dept Elect & Comp Engn Columbus OH 43210 USA US Air Force Res Lab Sensors Directorate Wright Patterson AFB OH 45433 USA

ISBN: (纸本)9781479946891

The focus of this paper is on the development of S-band radar using the Lyrtech Small Form Factor (SFF) Software Defined Radio (SDR) for generating the Chirp-Z signal. The Lyrtech SDR platform has a high speed AD/DA conversion board and a tunable RF board, which enable a flexible radar design. To achieve a functional radar system, the development kids of the SFF SDR have to be fully utilized. This paper introduces the usage of both software and hardware resources of the SDR for converting the SDR into a waveform-programmable radar, which can benefit the study of radar systems using generic SDR platforms. Based on our approach, we develop an S-band radar which is used to transmit a Chirp-Z radar waveform modulated on a 2.2GHz carrier. The structure and the development kits of the SFF platform are introduced, and the development of the S-band radar by using the development kits discussed. Finally, both transmitted and received Chirp-Z signals using the developed radar system are demonstrated.

关键词： Data conversion Digital signal processing field programmable gate arrays Radar Radio frequency Real-time systems Software

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Analysis of Distortions in the De-ramped LFM-CW Signal of an Extended Target

Analysis of Distortions in the De-ramped LFM-CW Signal of an...

引用

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

作者： K. V. Kamenskiy K. Yu. Gavrilov Moscow Aviation Institute (National Research University) Moscow Russia

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

Purpose. Analysis of distortions in the de-ramped linear frequency modulated continuous wave (LFM-CW) signal reflected from an extended target (ET), which model is presented by a set of point scatterers. Definition of parameters affecting distortions in the de-ramped signal spectrum, and development of ET radar profile restoration methods. Methodology. Numeric computations method based on the equation describing the de-ramped LFM-CW signal of an ET. The de-ramped signal properties analysis by means of numeric computation with varying values of properties of the probing signal and the ET. Findings. Parameters of the transmitted signal and the ET model that affect the distortions have been determined: starting frequency, frequency change rate, the ET relative height, the distance between the reflectors, the limits of phase noise values. The spectrum distortion index has been introduced. Value. ET radar profile restoration methods that can be used for signal processing have been developed.

关键词： radiolocation linear frequency modulated continuous wave spectrum distortions moire pattern speckle noise RADIO LOCATING Moire Patterns speckle noise extended target Fault trees signals frequency modulated continuous wave signal spectrum

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Partial discharge detection system for counting PD signals in high voltage underground cable by using FPGA technology

Partial discharge detection system for counting PD signals i...

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作者： Emilliano Chakrabarty, Chandan Kumar Ramasamy, Agileswari K. Ghani, Ahmad Basri A. Department of Electronics and Communications Engineering College of Engineering Universiti Tenaga Nasional Jln. Kajang-Puchong 43009 Selangor Darul Ehsan Malaysia TNB Research Sdn. Bhd. High Voltage Testing Laboratory Jln. Kajang-Puchong 43009 Selangor Darul Ehsan Malaysia

ISBN: (纸本)9788392131571

Currently, FPGA (field Programmable Gate Array) technology is being widely used for signal processing and control owing to its fast digital processing capability. We have recently developed successfully a high-speed data acquisition system that combines a commercial FPGA board (ML405) with the high speed ADC in ADC 083000RB that has 8 bit pairs LVDS in resolution, sampling rate of 3 GS/s and bandwidth of 3 GHz for counting very high speed transient signals. The programming is in VHDL. This system enables direct measurement and counting of transient signals at 1-10 ns pulse width at a sampling frequency 3 GHz. The partial discharge (PD) signals in this work are simulated by using Pico Pulse generator. All the counting is performed in the FPGA without the use of oscilloscope. The count rates are displayed in the LCD monitor of the FPGA hence rendering it to be highly mobile. © 2011 Institute of Electrical Power.

关键词： Data acquisition

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