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- Yarovoy, A.G. (author), Savelyev, T.G. (author), Aubry, P.J. (author), Ligthart, L.P. (author) conference paper 2007
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Amaldoss, S.E. (author), Yarovoy, A. (author)The effectiveness of a cavity for dual-band patch radiator with a frequency ratio of 1.65:1 is analysed. The use of cavities can help in maintaining impedance matching, reducing the levels of mutual coupling between the elements as well as in containing the surface waves, aspects vital to array performance. Results demonstrate that with the use...conference paper 2011
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Oude Nijhuis, A.C.P. (author), Krasnov, O.A. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author), Yarovoy, A. (author)A new trend is to observe atmospheric turbulence fields by using scanning Doppler radars and/or lidars. See e.g. Chan (2011) for the retrieval of eddy dissipation rate (EDR) maps at the Hongkong International Airport.conference paper 2014
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Yanovsky, F.J. (author), Turenko, D.M. (author), Oude Nijhuis, A.C.P. (author), Krasnov, O.A. (author), Yarovoy, A. (author)This paper presents mathematical models that are necessary to describe the relationship between Doppler spectrum width of the signal reflected from precipitation and eddy dissipation rate of turbulence kinetic energy. The feature of the models is taking into account the contribution of drop fall velocity variance, which is analyzed in detail,...conference paper 2015
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Homogeneous isotropic turbulence (HIT) models are compared, with respect to optimization of turbulence remote sensing. HIT models have different applications such as load calculation for wind turbines (Mann, 1998) or droplet track modelling (Pinsky and Khain, 2006). Details of vortices seem of less relevance for modelling `realistic measurements...conference paper 2015
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Oude Nijhuis, A.C.P. (author), Krasnov, O.K. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author), Yarovoy, A. (author)Homogeneous isotropic turbulence (HIT) models are compared, with respect to optimization of turbulence remote sensing. HIT models have different applications such as load calculation for wind turbines (Mann, 1998) or droplet track modelling (Pinsky and Khain, 2006). Details of vortices seem of less relevance for modelling `realistic measurements...conference paper 2015
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Blanco Campo, A. (author), le Chevalier, F. (author), Yarovoy, Alexander (author)One of the most striking challenges that radar designers have to deal with, when developing new doppler systems, is to overcome the difficulty of working with ambiguous velocities. Even using high PRF’s, target’s velocities become ambiguous because wavelengths are getting shorter. This article tries to depict an idea of becoming unambiguous in...conference paper 2015
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- Oude Nijhuis, A.C.P. (author), Krasnov, O.A. (author), Unal, C.M.H. (author), Russchenberg, H.W.J. (author), Yarovoy, A. (author) conference paper 2015
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Petrov, N. (author), le Chevalier, F. (author), Yarovoy, Alexander (author)In this paper the influence of clutter power spectrum on unambiguous radar target detection with single low pulse repetition frequency wideband waveform is analyzed. Impact of both stationary and diffuse clutter components for different signal bandwidths and coherent processing intervals (CPI) is studied. Exponential model of the ground clutter...conference paper 2016
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Petrov, N. (author), le Chevalier, F. (author), Yarovoy, Alexander (author)In this paper the problem of unambiguous moving target detection using wideband radar is considered. Doppler ambiguities, which are present in the low pulse repetition frequency mode, are transformed into ambiguous sidelobes of targets and clutter using range migration effect. However, the level of these sidelobes is typically high, such that...conference paper 2016
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Puskely, J. (author), Yarovoy, Alexander (author), Roederer, A.G. (author)A novel two-port, dual-band square-ring microstrip antenna element for wide-angle scanning planar phased array is proposed. The two ports are used to operate the antenna array over the L and S radar bands. Microstrip square-ring radiators are chosen due to their smaller dimensions compared to the conventional microstrip patch. To extend...conference paper 2016
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Petrov, N. (author), le Chevalier, F. (author), Bogdanovic, N. (author), Yarovoy, Alexander (author)The problem of range-migrating target detection in a compound-Gaussian clutter is studied here. We assume a target to have a range-walk of a few range cells during the coherent processing interval, when observed by wideband radar with high range resolution. Two CFAR detectors are proposed assuming different correlation properties of clutter over...conference paper 2017
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Xu, S. (author), Wang, J. (author), Yarovoy, Alexander (author)Radar imaging using ultra-wideband (UWB) automotive radar is investigated. To overcome poor cross-range resolution of traditional beamforming (BF) algorithms, super resolution technique is applied for the Direction of Arrival (DOA) estimation. Both super-resolution algorithm and conventional BF method are used to process experimental data...conference paper 2018
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Kabakchiev, C. (author), Garvanov, I. (author), Behar, V. (author), Kabakchiev, A. (author), Kabakchieva, D. (author), Rohling, H. (author), Kulpa, K. (author), Yarovoy, Alexander (author)In this paper, by comparing the GPS shadow parameters of the same cars obtainedf om the same satellites and recorded by the two different systems under the same conditions, the Stereo dual GNSSfi ont end (NSL's) and the GPS recording system of the Colorado University, we assess indirectly the capabilities of the new system for FSR...conference paper 2018
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Wang, J. (author), Aubry, P.J. (author), Yarovoy, Alexander (author)A matrix-pencil based wavenumber-domain multiband fusion approach is proposed for improved microwave imaging. The suggested fusion approach is based on the fact from the Born approximation that the wavenumber-domain signal in a given scattering direction can be represented as a sum of the same number of contributions over the whole bandwidth....conference paper 2018
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Kabakchiev, H. (author), Behar, V. (author), Garvanov, I. (author), Kabakchieva, D. (author), Kabakchiev, K. (author), Rohling, H. (author), Kulpa, K. (author), Yarovoy, Alexander (author)In this paper, the possibility of GPS-based Forward Scatter Radar (GPS FSR), where satellites are exploited as sources of signals, to detect falling cosmic objects is examined. It is known that in FSR systems, the signal re-reflected by falling cosmic objects as masked by a much stronger direct signal. The goal of the article is to evaluate...conference paper 2018
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Puskely, J. (author), Aslan, Y. (author), Roederer, A.G. (author), Yarovoy, Alexander (author)In this paper, we present a 5G base station phased antenna array concept based on the power equalization in the elevation cut. We designed aperture coupling microstrip patch array exploiting a substrate integrated waveguide structure as feeding line for realization of the cosecant radiation pattern in elevation cut. The antenna is designed to be...conference paper 2018
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Aslan, Y. (author), Puskely, J. (author), Roederer, A.G. (author), Yarovoy, Alexander (author)A convex iterative algorithm for the synthesis of uniform amplitude, space-tapered linear phased arrays with simultaneous multiple beam optimization for 5G applications is presented. The performance of the algorithm is demonstrated by the synthesis of two arrays having 16 and 24 elements with 60 and 90 degree scan range, respectively. The effect...conference paper 2018
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Schöpe, M.I. (author), Driessen, J.N. (author), Yarovoy, Alexander (author)In this paper, waveforms for MIMO phased array radar to enhance cross-range resolution are investigated. The problem of high sidelobes in range created by the use of Hybrid Codes with a single waveform and spatial coding is considered and a method to reduce these sidelobes by the use of Golay sequences as spatial codes is proposed. It is shown...conference paper 2018
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Feng, Ruoyu (author), Uysal, Faruk (author), Yarovoy, Alexander (author)A novel target azimuth estimation algorithm called ”MIMO-Monopulse” is proposed by combining monopulse approach with multiple-input multiple-output (MIMO) radar. Chebyshev and Zolotarev weighting are applied to synthesis sum and difference pattern of MIMO-monopulse. A new visualization method for monopulse ratio is discussed. Finally, the...conference paper 2018