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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Fedosov, V.P. Jameel, J.S. Kucheryavenko, S.V. Institute of Radio Systems and Control / Theoretical Foundations of Radio Engineering Southern Federal University Taganrog Russia

ISBN: (纸本)9798350322378

The emergence of a new type of information infrastructure that has the potential to support a variety of advanced healthcare services is being advanced by rapid advancements in information technology, telecommunications, and, more specifically, wireless and mobile communications - and their convergence ('telematics'). In order to improve network performance in the case of non-line-of-sight communications, which are typical in urban environments, the objectives of this paper is to provide an appropriate adaptive algorithm for use in telemedicine communication based on MIMO OFDM WiMAX (MIMO - Multiple Input Multiple Output, OFDM - Orthogonal Frequency-Division Multiple Access, WiMAX - Worldwide Interoperability for Microwave Access). In comparison to traditional wired methods, OFDM WiMAX technology is today regarded as one of the most widely used technologies for delivering faster implementations and lower costs for broadband wireless connectivity in urban areas. MSE, SNR, and noise components are used to perform the mathematical model analysis of the adaptive algorithm in MIMO systems. The throughput of medical images was improved, according to simulation results, using the adaptive algorithm. The experiments verified no data loss during wireless communication. It can also be concluded that the use of adaptive algorithms under conditions of multipath signal propagation has a better result on noise immunity. © 2023 IEEE.

关键词： MIMO systems

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EDSA-Ensemble: an Event Detection Sentiment Analysis Ensemble Architecture

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IEEE Transactions on Affective Computing 2024年第2期16卷 1-18页

作者： PETRESCU, Alexandru TRUICA, Ciprian-Octavian APOSTOL, Elena-Simona PASCHKE, Adrian Computer Science and Engineering Department Faculty of Automatic Control and Computers National University of Science and Technology Politehnica Bucharest Bucharest Romania Fraunhofer Institute for Open Communication Systems Berlin Germany

As global digitization continues to grow, technology becomes more affordable and easier to use, and social media platforms thrive, becoming the new means of spreading information and news. Communities are built around sharing and discussing current events. Within these communities, users are enabled to share their opinions about each event. Using Sentiment Analysis to understand the polarity of each message belonging to an event, as well as the entire event, can help to better understand the general and individual feelings of significant trends and the dynamics on online social networks. In this context, we propose a new ensemble architecture, EDSAEnsemble (Event Detection Sentiment Analysis Ensemble), that uses Event Detection and Sentiment Analysis to improve the detection of the polarity for current events from Social Media. For Event Detection, we use techniques based on Information Diffusion taking into account both the time span and the topics. To detect the polarity of each event, we preprocess the text and employ several Machine and Deep Learning models to create an ensemble model. The preprocessing step includes several word representation models: raw frequency, TFIDF, Word2Vec, and Transformers. The proposed EDSA-Ensemble architecture improves the event sentiment classification over the individual Machine and Deep Learning models. Authors

关键词： Sentiment analysis

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Influence of Active Interference on the Capacity of a MIMO-OFDM System Using an Adaptive Processing Algorithm

Influence of Active Interference on the Capacity of a MIMO-O...

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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Fedosov, V.P. Patsyuk, T.T. Institute of Radio Systems and Control / Theoretical Foundations of Radio Engineering Southern Federal University Taganrog Russia

ISBN: (纸本)9798350322378

The influence of active interference on the bandwidth of a MIMO-OFDM communication system is studied using an adaptive signal processing algorithm in the receiver. Theoretical calculations of the features and characteristics of MIMO systems are presented, and a mathematical model for calculating the throughput of MIMO systems is presented. Experiments on signal detection in a communication channel with and without adaptation using the Viner criterion and the presence of interference with one type of modulation (QPSK) are presented. The results show that the adaptation allows us to achieve an increase in throughput along the entire line of the dependence curve and for all SNRs, even in the presence of interference. © 2023 IEEE.

关键词： Orthogonal frequency division multiplexing

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Algorithm Pre-processing Images of the Underground Surface to Reduce the Background Noise

Algorithm Pre-processing Images of the Underground Surface t...

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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Fedosov, V.P. Ibadov, R.R. Ibadov, S.R. Institute of Radio Systems and Control / Theoretical Foundations of Radio Engineering Southern Federal University Taganrog Russia

ISBN: (纸本)9798350322378

The article presents an algorithm for pre-processing images of the map of the underlying surface to reduce background noise. The aim of the development is to create an algorithm for a fast and highly efficient system for processing noisy areas of the underlying surface map. Methods for averaging images using filters are considered. The object of the research is the methods of preprocessing and filtering of map images. Preprocessing is an important step for analyzing the map of the underlying surface in order to eliminate image defects that prevent obtaining complete information about objects, areas of interest taken from the UAVs. An image preprocessing algorithm based on a median filter using a deep learning neural network has been studied and its software implementation has been developed. The efficiency of the developed algorithm was evaluated using two quality criteria, such as the peak signal-to-noise ratio and the standard error criterion. © 2023 IEEE.

关键词： Median filters

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Developing an Automated Design System for radio Frequency Planning of Wireless Communication Coverage in Mathcad Environment

Developing an Automated Design System for Radio Frequency Pl...

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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Vaganova, Anastasia A. Panychev, Andrey I. Kisel, Natalia N. Institute of Radio Engineering Systems and Control Southern Federal University Taganrog Russia

ISBN: (纸本)9798350322378

The problem of creation of wireless communication systems is complex enough, that is why software allowing to simulate the propagation of an electromagnetic field in a certain place is a thing of interest. Although several foreign commercial programs for the simulation of radio wave propagation in indoor and urban scenarios exist, developing domestic software is an important task in the current time. The program for three-dimensional tracing of the electromagnetic field in the room, proposed in this paper, is implemented in Mathcad environment. The aim of this article is to describe the main principles underlying the proposed program and to demonstrate its operation by solving several model tasks. The obtained results are compared with results of the same tasks solved in a well-known WinProp program. The results obtained in both programs are rather similar and this fact proves that the proposed algorithm is correct and can be used as the foundation for further developing a full-fledged domestic software. © 2023 IEEE.

关键词： Electromagnetic fields

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Reduction of Parasitic Reflections in an Anechoic Chamber

Reduction of Parasitic Reflections in an Anechoic Chamber

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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Yuhanov, Yuriy Merglodov, Ilya Ilin, Igor Sinanyan, Karekin Institute of Radio Engineering Systems and Control South Federal University Taganrog Russia

This article is devoted to measurements of stealth objects in an anechoic chamber. The paper discusses methods for reducing parasitic reflections in an anechoic chamber (chamber) for the correct measurement of stealth... 详细信息

ISBN: (纸本)9798350322378

关键词： Anechoic chambers

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Investigation of the influence of the CSRR resonator parameters on the characteristics of a Ku-band microstrip SIW antenna 5

Investigation of the influence of the CSRR resonator paramet...

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5th International Youth Conference on radio Electronics, Electrical and Power engineering, REEPE 2023

作者： Kisel, Natalia N. Panychev, Andrey I. Vaganova, Anastasia A. Southern Federal University Institute of Radio Engineering Systems and Control Taganrog Russia

ISBN: (纸本)9798350399523

The paper presents the results of simulation of a Kuband microstrip substrate integrated waveguide antenna (SIW antenna) with a complementary split ring resonator (CSRR) using the computational electromagnetics code FEKO. Structural synthesis of the antenna design is used to study the influence of geometrical parameters of a resonator on the main antenna characteristics. The frequency dependences of the return loss, gain and voltage standing wave ratio in 9.5 - 13.5 GHz band are analyzed. The field distribution inside the antenna, the distribution of surface currents and the parameters of radiation patterns at resonant frequencies are also discussed. The research shows that the combination of substrate integrated waveguide technology and CSRR structure allows reducing the resonant frequency by 12.7% and obtaining the second resonant frequency, which is 8.5% higher in comparison with a SIW antenna without CSRR. It also leads to the improvement of the antenna parameters at the second resonant frequency, except for the operating band, which narrows by almost 1.5 times. © 2023 IEEE.

关键词： Microstrip antennas

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Research of the Effect of PUMA Cell Design Dimensions on its Radiation Characteristics

Research of the Effect of PUMA Cell Design Dimensions on its...

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2023 Radiation and Scattering of Electromagnetic Waves, RSEMW 2023

作者： Nazarova, Valeria V. Yukhanov, Yuri V. Institute of Radio Engineering Systems and Control Southern Federal University Taganrog Russia

ISBN: (纸本)9798350322378

An ultra-wideband tightly coupled array antenna with low profile is proposed in this paper. PUMA arrays are broadband, but they don't always have good frequency overlap, but benefit from the size and lightness of design. The presented model is characterized by simplicity of design and simplified feeding from coaxial cables. The analyses in this paper focus on a PUMA cell as part of a tightly coupled infinite array, where the mutual coupling between the elements is used to extend the operating frequency bandwidth of the array by changing its dimensions, the shape of the dipole arms and the capacitive metal plates. Metal cylinders printed on dielectric layers adjacent to the dipoles provide capacitive coupling between the arms of the dipoles. The first design considered, with a size of 30×30 mm, has a low profile, at a high frequency of 5.13 GHz, the cell height is λhigh/2.7, with a frequency overlap of 4.66:1. A design with reduced dimensions was also considered, which made it possible to extend the working frequency band, it is also low profile (λhigh/2.5), the frequency overlap is 4.4:1. © 2023 IEEE.

关键词： Antenna arrays

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Simulation of energy absorption in a device for microwave heating of liquid 5

Simulation of energy absorption in a device for microwave he...

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5th International Youth Conference on radio Electronics, Electrical and Power engineering, REEPE 2023

作者： Kisel, Natalia N. Vaganova, Anastasia A. Panychev, Andrey I. Southern Federal University Institute of Radio Engineering Systems and Control Taganrog Russia

ISBN: (纸本)9798350399523

Microwave energy can be used for heating, drying, pasteurization and thawing of different foods, as this technology is suitable for processing various dielectric materials, efficient and environmentally friendly. This paper is devoted to simulation of energy absorption in a liquid pasteurizer. The device consists of a rectangular waveguide with hollow dielectric tubes passing through it. Flowing through the tubes, the liquid absorbs microwave energy and heats up. The electric field distribution in the waveguide and specific absorbed power are simulated for various parameters of the device using a specialized computer-aided design software. Based on performed calculations, the angle of inclination of the tubes equal to 43° is optimal. It is not possible to achive an even power distribution across all the tubes, and the power absorption in the first and last tubes differs by about 20 times. However, the liquid flows through all tubes consequentially, therefore, the resulting unevenness is acceptable. The evaluation of precision of the results is performed. © 2023 IEEE.

关键词： Electric fields

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Voltage and power control for distributed generation units in islanded microgrids 6th

Voltage and power control for distributed generation units i...

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6th International Conference on Renewable Energies Offshore, RENEW 2024

作者： Rouch, T. Bagheri M’zoughi, F. Aboutalebi, P. Ahmad, I. Garrido, A.J. Garrido, I. Institute of Research and Development of Processes—IIDP Department of Automatic Control and Systems Engineering Faculty of Engineering of Bilbao University of the Basque Country Bilbao Spain

ISBN: (纸本)9781032905570

This article presents an optimized control strategy tailored for DC islanded microgrids, featuring a voltage controller based on mixed H2/H∞ state feedback using linear matrix inequalities (LMIs) and a power controller guided by droop characteristics. A polytopic modeling approach addresses system uncertainties and nonlinearities. The controller aims to stabilize the system, reject disturbances, equitably distribute power among distributed generation units (DGUs), and minimize energy consumption. Regional pole placement ensures welldamped transient responses. Simulation results demonstrate effective management of load perturbations and DGU disconnections, with a comparative analysis against an H∞ controller offering additional insights into performance. © 2025 The Author(s).

关键词： Microgrids

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