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Caratelli, D. (author), Yarovoy, A. (author)Ground-penetrating radar (GPR) technology finds applications in many areas such as geophysical prospecting, archaeology, civil engineering, environmental engineering, and defence applications as a non-invasive sensing tool [3], [6], [18]. One key component in any GPR system is the receiver/transmitter antenna. Desirable features for GPR antennas...book chapter 2011
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Tran, D. (author), Haider, N. (author), Aubry, P. (author), Szilagyi, A. (author), Lager, I.E. (author), Yarovoy, A. (author), Ligthart, L.P. (author)The number of topside shipboard antennas doubled every decade; in 1990s they were close to 200 and have no sight of stop growing (Tavik, 2005). The over-crowded present of such many topside antennas in a limited-space of littoral warfare ship has created/caused many critical, unavoidable problem like antenna blockage, electromagnetic...book chapter 2011
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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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- Yarovoy, A.G. (author), Savelyev, T.G. (author), Aubry, P.J. (author), Ligthart, L.P. (author) conference paper 2007
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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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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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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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Guendel, Ronny (author), Kruse, N.C. (author), Fioranelli, F. (author), Yarovoy, Alexander (author)Recognition of continuous human activities is investigated in unconstrained movement directions using multiple spatially distributed radar nodes, where activities can occur at unfavourable aspect angles or occluded perspectives when using a single node. Furthermore, such networks are favourable not only for the aforementioned aim, but also for...conference paper 2022
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Su, Guigeng (author), Petrov, N. (author), Yarovoy, Alexander (author)In this paper, we propose a method for continuous monitoring of vital signs-in particular, respiration frequency-with a commercial mm-wave radar. The nearly constant frequency (NCF) model is adopted to represent chest displacement due to respiration and simulate radar response. Based on this model, an extended Kalman filter (EKF) based...conference paper 2021
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Papanastasiou, V. S. (author), Trommel, R. P. (author), Harmanny, R. I.A. (author), Yarovoy, Alexander (author)For the first time identification of human individuals using micro-Doppler (m-D) features measured at X-band has been demonstrated. Deep Convolutional Neural Networks (DCNNs) have been used to perform classification. Inspection and visualization of the classification results were performed using Uniform Manifold Approximation and Projection ...conference paper 2021
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Rol, M.P. (author), Nijboer, Ronald (author), Yarovoy, Alexander (author)Electromagnetic (EM) waves propagate through the atmosphere where they are refracted depending on the composition of the atmosphere. This refraction highly influences the propagation of the EM-waves. Certain atmospheric conditions can cause EM-waves to get trapped within a duct. In these ducts blind zones may occur, where there is no EM-wave...conference paper 2022
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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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Krasnov, O.A. (author), Zhang, Q. (author), Yarovoy, Alexander (author)In this paper, the full calibration chain of FMCW radar with simultaneous transmission of two orthogonally polarized orthogonal waveforms is considered. Specifically for this type of polarimetric radar, compensation of signals’ biases and equalization of the amplification gains of the parallel polarimetric channels in the receiver are jointly...conference paper 2024
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Dash, T.K. (author), Driessen, J.N. (author), Krasnov, O.A. (author), Yarovoy, Alexander (author)The challenge of reconstructing the Doppler spectrum of a precipitation-like event observed by a fast-scanning weather radar is addressed. A novel method is proposed where the echo sequence in time is assumed to be a complex Gaussian process with a known covariance structure. It is a two-step approach where the first step is the estimation of...conference paper 2024
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Aslan, Y. (author), Roederer, A.G. (author), Yarovoy, Alexander (author)The system effects and trade-offs of varying the minimal angular separation among multiple simultaneous co-frequency users are investigated for a high-capacity multibeam communication scenario. Through the statistical system simulations, it is demonstrated that the optimal (non-zero) value of the required separation depends on the base station...conference paper 2020
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Sethuraman, H. Visvanathan (author), Yarovoy, Alexander (author), Fioranelli, F. (author)The ability of a fully polarimetric radar to discriminate between payloads carried by UAVs is demonstrated. A novel approach has been employed in the feature extraction algorithm, where features from individual and combined polarimetric channels are extracted for classification. Decision and ensemble fusions on the respective extracted features...conference paper 2022
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Han, Y. (author), Yarovoy, Alexander (author), Fioranelli, F. (author)This research aims to develop a contactless, radar-based sleep apnea detection method. A novel identification approach for this is proposed, based on the envelope of UWB radar spectrograms and machine learning. The envelope of the spectrogram is extracted by an image-based method, followed by signal smoothing via variational mode decomposition ...conference paper 2022
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Guo, Zhongyuan (author), Guendel, Ronny (author), Yarovoy, Alexander (author), Fioranelli, F. (author)Radar-based Human Activity Recognition(HAR) is considered by using snapshots of point clouds. Such point cloudsinterpret 2D images generated by an mm-wave FMCW MIMO radar enriched byincluding Doppler and temporal information. We use the similarity between suchradar data representation and the core of the self-attention concept inartificial...conference paper 2023
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Kumbul, U. (author), Chen, Yue (author), Petrov, N. (author), Silveira Vaucher, C. (author), Yarovoy, Alexander (author)Mutual interference in the frequency modulated continuous wave (FMCW) radar is studied, and the influence of the FMCW interference on the beat frequency is analyzed. An analytical expression for the victim radar received signal spectrum is derived. Different interference scenarios are investigated by means of interference impact on the range...conference paper 2023