Physics and Astronomy, Mathematical Physics, Electrical and Electronic Engineering, Computational Theory and Mathematics
38
Scopus Publications
141
Scholar Citations
5
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1
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Scopus Publications
OFF-AXIS TARGET ILLUMINATION IN RADAR OVER-SEA TRACKING USING AN ACTIVE PHASED ARRAY ANTENNA Yu. Logvinov, Yu. Pedenko, O. Bukin, and Radio Physics and Radio Astronomy, 2025 Subject and Purpose. Th is paper addresses the challenge of measuring the angular coordinates of over-sea low-altitude targets and strives to improve the measurement accuracy of radar systems that employ high-resolution algorithms implemented through active phased array antennas (APAAs). The primary purpose is to substantiate the eff ectiveness of off-axis target illumination in the context of sea clutter and multipath. Off-axis target illumination reduces the depth of the probing signal interference fading over the radar-to-target path. The investigated illumination method focuses on mitigating errors in target angle measurements by multi-channel methods based on high-resolution algorithms, such as root-MUSIC. One of the main spoilers of measurement accuracy when using those algorithms is the noise in the radar receiving channels. Off-axis target illumination helps avoid a deep fade of the signal, thereby enhancing the signal-to-noise ratio (SNR) in the receiving channels of APAA-equipped radar systems, which contributes to target tracking stability despite destructive multipath interference. Methods and Methodology. The study employs computer simulations within a multipath radio-wave propagation model for a rough sea surface, allowing for both specular and diffuse reflections. The power distribution of diffuse reflections and their mapping along the propagation path are evaluated using the empirical glistening-surface model, the most advanced to date. Results. Quantitative assessments of the effectiveness of off-axis target illumination have been obtained in the context of fading conditions produced by multipath radio wave propagation over the sea surface. The optimal illumination angles have been identified. They help avoid deep fades over a wide range of sea states. These optimal angles are confined within 0.6 to 0.75 of the beamwidth of the radiation pattern. The lower end of the indicated range refers to the diffuse sea clutter, and the upper end corresponds to the specular reflection of the probing signal. In the most adverse cases, a gain in the SNR reaches 6—8 dB. Conclusions. It has been confirmed that off-axis illumination allows decreasing the depth of the illumination signal fades, which ensures more stable target tracking by angular coordinates. Recommendations for selecting off-axis illumination angles have been formulated.
ON THE ACHIEVABLE UPPER LIMIT OF THE ELEVATION ANGLES OF EFFECTIVE DIRECTION FINDING OF TARGETS OVER THE SEA BY THE ROOT-MUSIC METHOD PROVIDED WITH ADEQUATE A PRIORI PARAMETERS Yu Logvinov, Yu. Pedenko, N. Reznichenko, and Radio Physics and Radio Astronomy, 2024 Subject and Purpose. The paper investigates the accuracy of measurements of the elevation angles of targets located near the sur- face of a disturbed sea in the area from the upper limit of their extremely small values to the free space zone. The main part of the study concerns measurements using the root-MUSIC method based on the analysis of the eigenvalues of the autocorrelation matrix of signals received from the target. Under the same conditions, the accuracy of measurements using the amplitude sum-difference (monopulse) method was obtained. The purpose of the work was to determine the upper limit of the location angles up to which the accuracy of the root-MUSIC method exceeds the accuracy of the monopulse method measurements, and thereby determine the area of its effective use. Methods and Methodology. The study was conducted using computer modeling of the measurement of elevation angles by two types of radio direction finders. The first one used the root-MUSIC measurement method, and the second one used the monopulse method. Both operated at a wave of 3.2 cm and had the same receiving antenna aperture of 2.5 m. The modeling was performed for sea waves from calm to heavy. In addition to interference from the sea, interference caused by internal noise of the direction finders’ receiving channels was taken into account. The modeling calculated the distance dependencies of the measurement errors of the tar- get’s position angles moving at a constant height of 20 m at a distance from 2 to 0.5 km. This ensured the overlap of the position angles in the range of 0.57...2.28 of the width of the sum directional pattern of the monopulse direction finder. Results. Under the same sea waves and using equal apertures of the receiving antennas, the values of the errors in measuring the target elevation angles by both methods were obtained. Recommendations for choice the a priori parameters of the root-MUSIC method have been developed, which ensure high measurement accuracy in different interference conditions. Conclusions. It was found that the root-MUSIC method has a higher accuracy of measuring the elevation angles of low-altitude targets over the sea compared to the widely used monopulse method up to position angles equal to twice the width of the sum direc- tional pattern of the monopulse direction finder antenna
NEAR THE ORIGINS OF MILLIMETER WAVE RADAR (90-th anniversary of Vadym В. Razskazovsky) O. Kostenko, Yu. Logvinov, Yu. Pedenko, and Radio Physics and Radio Astronomy, 2023 This paper is dedicated to the 90-th anniversary of Vadym Borysovych Razskazovsky, an outstanding scientist in the fields of radio engineering and radio science, holder of the titles and positions like DSc (Engineering), Professor, and Head of the Statistical radio physics department at the O.Ya. Usikov Institute for Radio Physics and Electronics within the Academy of Sciences of Ukraine.
SELECTION OF SHF-BACKSCATTERING MODEL OF THE SEA SURFACE WITH REGARD TO SHADOWING A. Bukin, V. Gutnik, Yu. Lohvinov, N. Reznichenko, and Radio Physics and Radio Astronomy, 2023 Subject and Purpose. The article is devoted to the analysis of theoretically and experimentally obtained values of the specific effective sea-scattering surface in the region of super-high-frequencies (SHF). The study is reasoned by the need to know characteristics of the electromagnetic wave scattering from various objects at the modeling stage. The focus is on the choice of backscattering model with a methodology of specific effective scattering surface estimation that takes into account the shadowing effect of the sea surface under given conditions. Methods and Methodology. The study is based on mathematical modeling techniques and is accompanied by the comparison of the modeling results with experiment. Results. Proceeding from the simulation results with the effect of sea-surface shadowing taken into account and relying on the check of consistency with the measured data, a comparison analysis has been performed among theoretical models of specific effective sea-scattering surface calculation at low grazing angles. Conclusion. Analysis has been given to the specific effective sea-scattering surface obtained by the facet and two-scale models and to the values measured by experiment. Quantitative estimates of the specific effective scattering surface have been obtained with the shadowing effect of the sea surface taken into account. Analysis of the quantitative estimates has been carried out.
Novel Planar Self-Similar Fractal Sets with a Variable Hausdorf Dimension Andrew G. Koshovy, George I. Koshovy, Yuryi F. Logvinov 2022 IEEE 2nd Ukrainian Microwave Week Ukrmw 2022 Proceedings, 2022 Two different approaches to generalizations of the classical two-dimensional Sierpinski carpet are presented in correct mathematical sense. The first generalization is based on classical principle of fractal carpet creation. It relates to the change of the fractal creator. In the result a series of two-dimensional self similar fractal square sets can be arisen. The second generalization is reworked on the base of one-dimensional self similar fractal sets with a variable fractal dimension. For all generalized classes of self similar fractal square sets have been presented basic elements of their mathematical analyses.
The Plane Wave Scattering by Not Classic Multi Level Coplanar Systems of Flat Impedance Strips George I. Koshovy, Yuryi F. Logvinov, Valentina. I. Karpenko Proceedings IEEE International Conference on Electronics and Nanotechnology Elnano, 2022 The problem of the plane (electromagnetic or acoustic) wave scattering by a multi level not classical coplanar system of flat impedance strips is analyzed on the base of the singular integral equation method. Considerable attention is focussed on some types of terrible “Devil stairs” functions, corresponding to some self similar fractals with a variable fractal dimension. It is important to have a lot of not classical sets for usage in construction of the coplanar system of impedance strips. The stages of the “Devil stairs” function constructive procedure can be useful for modelling of natural specific irregular zones in regular two-dimensional space. A partial (but important for applications) case of sparsely filled coplanar strip system is analyzed. In this case, the plane wave scattering problems have explicit asymptotical solutions in the closed analytical form.
Determination of Surface Parameters when Modeling Backscattering of Radio Waves Alexsandr Bukin, Yurii Logvinov, Victor Gutnik, Nikolai Reznichenko 2020 IEEE Ukrainian Microwave Week Ukrmw 2020 Proceedings, 2020 The article is devoted to modeling the backscattering of the electromagnetic field as applied to the millimeter and centimeter ranges of radio wavelengths. The relevance of such studies is determined by the need to obtain the characteristics of the scattering of electromagnetic waves by various objects at the modeling stage. The aim of the work is to determine the acceptable values of surface discretization in the implementation of known and promising methods for calculating the scattered field.To achieve this goal, methods of mathematical and statistical modeling were used. The simulation results were compared with theoretical studies.The results of numerical simulation of electromagnetic field scattering using the Fresnel-Kirchhoff diffraction formula and a method based on representing the surface in the form of elementary flat areas are considered. Comparison of model and theoretical data on the effective scattering surface for the simplest objects (ball and plane) made it possible to determine the allowable value of the discretization of surfaces during backscattering of electromagnetic fields on them. It is shown that the determination of the field strength by the Fresnel-Kirchhoff method allows one to obtain an effective scattering surface with values that most closely coincide with theoretical data.It is shown that the Fresnel-Kirchhoff method most accurately describes the basic properties of a scattered field. When applying the modeling method, when the surface is represented as a set of flat elements with scattering patterns characteristic of them, it is necessary to normalize the results taking into account theoretical and experimental data.
Modeling Sea Waves for Radiophysical Problems Ihor Deineka, Vladimir Zuykov, Viktor Gutnik, Yurii Logvinov 2020 IEEE Ukrainian Microwave Week Ukrmw 2020 Proceedings, 2020 The relevance of modelling of sea waves is determined by the need to produce a model of sea-based radio performance at the design stage. One of the main parts of these models have the underlying surface. The paper presents a methodology for creating digital models of wind waves with respect to the modeling of propagation over the sea surface. The criteria of choice of the lower and upper boundaries of the spectrum of sea waves, the sampling frequency of the spectrum, the angle and pitch to create random sampling surface.
Determination of Characteristics of Illuminated Elements of the Sea Surface during the Propagation of Radio Waves at Small Glide Angles Victor Gutnik, Valentina Karpenko, Georgii Koshovoi, Yurii Logvinov 2020 IEEE Ukrainian Microwave Week Ukrmw 2020 Proceedings, 2020 The article is devoted to modeling the backscattering of the electromagnetic field on the sea surface in relation to the millimeter and centimeter ranges of radio wavelengths. The relevance of such studies is determined by the need to model the characteristics of sea-based radio systems at the design stage. The aim of the work was to determine the characteristics of the illuminated elements of the underlying surface in relation to the backscattering of radio waves at small slip angles.To achieve this goal, the methods of mathematical and statistical modeling were used. The simulation results were compared with experimental data.Comparison of the lifetimes of the scattering elements of the sea surface and the speeds of their movement with the durations of bursts of the scattered radio signal and Doppler shifts of the radio frequency when moving the diffusers of the electromagnetic field showed the consistency of the results obtained from the simulation with experimental data. The characteristics of the scattering elements of the sea surface are obtained as applied to the backscattering of radio waves at small slip angles. Among them are the probabilities of the illumination of the scattering elements of the surface, their average radii of curvature, as well as the local angles of incidence of the radio wave on the illuminated surface elements.It is shown that with the propagation of radio waves, significant surface shading occurs. This leads to the fact that the electromagnetic field is scattered almost only on the tops of the highest sea waves. In this case, the local angles of incidence of the electromagnetic field on the scattering element of the surface approach 90°. At such local angles of incidence, the illuminated surface element has a very low reflectivity in the opposite direction.
Mikrowave propagation factor at small grazing angle over sea V.B. Razskazovskyy, Yu.F. Logvinov Msmw 07 Symposium Proceedings the 6th International Kharkov Symposium on Physics and Engineering of Microwaves Millimeter and Submillimeter Waves and Workshop on Terahertz Technologies, 2007
The influence of shadowings on the spectrum of fluctuations of millimeter waves in the multipath propagation over the sea Radiotekhnika I Elektronika, 1998
Influence of Shadowings on the Spectrum of Fluctuations of Millimeter Waves in Multipath Propagation over the Sea Journal of Communications Technology and Electronics, 1998
Off-Axis Target Illumination in Radar Over-Sea Tracking Using AN Active Phased Array Antenna Y Logvinov, Y Pedenko, O Bukin Radio Physics and Radio Astronomy 30 (4), 250-257 , 2025 2025
On the Achievable Upper Limit of the Elevation Angles of Effective Direction Finding of Targets Over the Sea by the Root-Music Method Provided with Adequate a Priori Parameters Y Logvinov, Y Pedenko, N Reznichenko РАДИОФИЗИКА И РАДИОАСТРОНОМИЯ 29 (4), 281-292 , 2024 2024
Determination of characteristics of illuminated elements of the sea surface during the propagation of radio waves at small glide angles V Gutnik, V Karpenko, G Koshovoi, Y Logvinov 2020 IEEE Ukrainian Microwave Week (UkrMW), 974-977 , 2020 2020 Citations: 1
Modeling Sea Waves for Radiophysical Problems I Deineka, V Zuykov, V Gutnik, Y Logvinov 2020 IEEE Ukrainian Microwave Week (UkrMW), 970-973 , 2020 2020
Determination of Surface Parameters when Modeling Backscattering of Radio Waves A Bukin, Y Logvinov, V Gutnik, N Reznichenko 2020 IEEE Ukrainian Microwave Week (UkrMW), 978-982 , 2020 2020
Mathematical models of the plane sonic wave scattering by pre-fractal flat impedance strips system VI Karpenko, GI Koshovy, YF Logvinov Telecommunications and Radio Engineering 79 (15) , 2020 2020 Citations: 3
Характеристики рассеивающих элементов морской поверхности при распространении радиоволн под малыми углами скольжения ВГ Гутник, МЮ Логвинов, ЮФ Логвинов Радіофізика та електроніка, 24-32 , 2019 2019
Specific features of sea wave modeling for radiophysical applications AS Glazunov, VG Gutnik, MY Lohvinov, YF Lohvinov Telecommunications and Radio Engineering 76 (20) , 2017 2017 Citations: 1
Features of sea wave modeling for radiophysical problems AS Glazunov, VG Gutnik, MY Logvinov, YF Logvinov Radiofiz. Elektron 22 (2), 41-49 , 2017 2017 Citations: 3
Особенности моделирования морского волнения для радиофизических задач АС Глазунов, ВГ Гутник, МЮ Логвинов, ЮФ Логвинов Радіофізика та електроніка, 41-49 , 2017 2017
Влияние двукратного взаимодействия при многолучевом распространении под малыми углами скольжения ЮФ Логвинов, ВБ Разсказовский Вісті вищих учбових закладів. Радіоелектроніка 58 (11), 27-38 , 2015 2015 Citations: 1
Influence of double interaction in multipath propagation at small grazing angles YF Logvinov, VB Razskazovsky Radioelectronics and Communications Systems 58 (11), 497-505 , 2015 2015
Nontraditional methods and means of radar VD Erjomka, VA Kabanov, YF Logvinov, IM Mytsenko, VB Razskazovskiy, ... Kharkov:«V lavke» Publ.(in Russian) , 2015 2015 Citations: 2
Distinctive features of forming the space-time millimeter radio-wave field at low altitudes above the sea surface VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 73 (5) , 2014 2014 Citations: 4
A model of multipath propagation of millimeter radio waves over the sea surface at strong shadowings VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 73 (4) , 2014 2014 Citations: 2
Влияние затенений на статистические характеристики зеркальных элементов при многолучевом распространении над морем YF Logvinov РАДИОФИЗИКА И РАДИОАСТРОНОМИЯ 2 (4), 450 , 2013 2013
Особенности распространения радиоволн над морской поверхностью ВД Ерёмка, ВА Кабанов, ЮВ Логвинов, ИМ Мыценко, ... Севастополь: Вебер , 2013 2013 Citations: 8
Модель многолучевого распространения миллиметровых радиоволн над морской поверхностью при сильных затенениях ВБ Разсказовский, ЮФ Логвинов Радиофизика и электроника, 30-39 , 2013 2013 Citations: 2
WAVE PROPAGATION AND SCATTERING-Influence Produced by the Multipath Propagation of Radio Waves on Accuracy of Measurement of the Angle of Elevation of the Low-Level Radiator … VB Razskazovskiy, YF Logvinov, YA Pedenko Telecommunications and Radio Engineering 71 (5), 387 , 2012 2012
Influence produced by the multipath propagation of radio waves on accuracy of measurement of the angle of elevation of the low-level radiator using a root-MUSIC algorithm VB Razskazovsky, YF Logvinov, YA Pedenko Telecommunications and Radio Engineering 71 (5) , 2012 2012 Citations: 3
MOST CITED SCHOLAR PUBLICATIONS
Дифракционная модель многолучевого распространения над неровной поверхностью при малых углах скольжения ЮФ Логвинов, ЮА Педенко, ВБ Разсказовский Изв. вузов. Радиофизика-1996.-39, 547-558 , 1996 1996 Citations: 10
Heuristic model of microwave field over the rough sea surface under intense shadowing VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 70 (14) , 2011 2011 Citations: 9
Multipath simulating model of the microwave propagation near the sea surface VA Kirichenko, YF Logvinov, YA Pedenko, VB Razskazovskyy Fourth International Kharkov Symposium'Physics and Engineering of Millimeter … , 2001 2001 Citations: 9
Особенности распространения радиоволн над морской поверхностью ВД Ерёмка, ВА Кабанов, ЮВ Логвинов, ИМ Мыценко, ... Севастополь: Вебер , 2013 2013 Citations: 8
Множитель ослабления радиоволн при распространении над морем под малыми углами скольжения: модель многократной дифракции ВБ Разсказовский, ЮФ Логвинов Радиофизика и электроника 12 (1), 168-176 , 2007 2007 Citations: 7
Microwave propagation factor at small grazing angle over sea: Transient domain VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 66 (18) , 2007 2007 Citations: 5
Distinctive features of forming the space-time millimeter radio-wave field at low altitudes above the sea surface VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 73 (5) , 2014 2014 Citations: 4
Влияние затенений на статистические характеристики зеркальных элементов при многолучевом распространении над морем ЮФ Логвинов Радиофизика и радиоастрономия 2 (4), 450-457 , 1997 1997 Citations: 4
Diffraction model of mutipath propagation over rough surface at low grazing angles YF Logvinov, YА Pedenko, VB Razskazovsky Procs. of Higher School. Radio Physics 39 (5), 547-558 , 1996 1996 Citations: 4
Mathematical models of the plane sonic wave scattering by pre-fractal flat impedance strips system VI Karpenko, GI Koshovy, YF Logvinov Telecommunications and Radio Engineering 79 (15) , 2020 2020 Citations: 3
Features of sea wave modeling for radiophysical problems AS Glazunov, VG Gutnik, MY Logvinov, YF Logvinov Radiofiz. Elektron 22 (2), 41-49 , 2017 2017 Citations: 3
Influence produced by the multipath propagation of radio waves on accuracy of measurement of the angle of elevation of the low-level radiator using a root-MUSIC algorithm VB Razskazovsky, YF Logvinov, YA Pedenko Telecommunications and Radio Engineering 71 (5) , 2012 2012 Citations: 3
Дифракционная модель распространения радиоволн: азимутальные ошибки источника излучения ВБ Рассказовский, ЮФ Логвинов Матер. IV Междунар. радиоэлектронного форума «Прикладная радиоэлектроника … , 2011 2011 Citations: 3
Errors of direction-finding of radiant under the action of radio waves diffraction on the obstacle boundary VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 70 (12) , 2011 2011 Citations: 3
Эвристическая модель поля миллиметровых и сантиметровых радиоволн над взволнованной морской поверхностью при сильных затенениях ВБ Разсказовский, ЮФ Логвинов Радиофизика и электроника 15 (4), 23 , 2010 2010 Citations: 3
Распространение сантиметровых и миллиметровых радиоволн под малыми углами скольжения: модель многократной дифракции на экранах ВБ Разсказовский, ЮФ Логвинов Известия высших учебных заведений. Радиофизика 51 (8), 700-710 , 2008 2008 Citations: 3
Microwave propagation factor at small grazing angle over sea: The model of multiple knife-edge diffraction VB Razskazovsky, YF Logvinov Telecommunications and Radio Engineering 66 (18) , 2007 2007 Citations: 3
Закон распределения флуктуаций множителя ослабления миллиметровых и сантиметровых радиоволн над морем ВА Кириченко, ЮФ Логвинов, ЮА Педенко, ВБ Разсказовский Радиофизика и электроника.-Харьков: Ин-т радиофизики и электрон. НАН Украины … , 1998 1998 Citations: 3
Влияние затенений на спектр флуктуаций ММВ при многолучевом распространении над морем ЮФ Логвинов, ЮА Педенко, ВБ Разсказовский Радиотехника и электрон.-1998.-43, 786-791 , 1998 1998 Citations: 3
Тез. докладов П ЮФ Логвинов Всесоюзной школы по распростр. ММ и СубММ волн в ат-мосфере. Н. Новгород … , 1991 1991 Citations: 3