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Driessen, E.F.C. (author), Heemskerk, P.O.M. (author), Stolwijk, D. (author), Van der Drift, E.W.J.M. (author), De Dood, M.J.A. (author)
The measured reflection spectra of two-dimensional photonic crystal slabs consist of an asymmetric peak on top of an oscillating background. For p-polarized light, the asymmetry of the peak flips for angles of incidence beyond Brewster’s angle. We explain the observed line shapes with a Fano model that includes loss and use a waveguide model to...
conference paper 2008
document
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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Schöpe, M.I. (author), Driessen, J.N. (author), Yarovoy, Alexander (author)
The radar resource management problem in a multitarget tracking scenario for multi-function radar is considered. To solve it, an optimal balancing of the sensor budget by applying Lagrangian relaxation and the subgradient method is proposed. In a time-invariant scenario it is shown that the proposed method will lead to balanced budgets based on...
conference paper 2020
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Schöpe, M.I. (author), Driessen, J.N. (author), Yarovoy, Alexander (author)
The sensor resource management problem in a multi-object tracking scenario is considered. In order to solve it, a dynamic budget balancing algorithm is proposed which models the different sensor tasks as partially observable Markov decision processes. Those are being solved by applying a combination of Lagrangian relaxation and policy rollout....
conference paper 2020
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Kladogenis, Chrysovalantis (author), Driessen, J.N. (author), Krasnov, O.A. (author), Yarovoy, Alexander (author)
Wind turbines usually cause significant interference in the conventional radar operations which might degrade the detection capabilities. Wind turbines do not only block the radar beam focusing on a specific target, thus creating shadowing effects, but also impose Doppler spectra contamination due to the continuous blade rotation. Therefore...
conference paper 2019
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van der Werk, Bas (author), Schöpe, M.I. (author), Driessen, J.N. (author)
Radar Resource Management in a multi-sensor multi-target scenario is considered. A dynamic resource balancing algorithm is proposed which optimizes target task parameters assuming an underlying partially observable Markov decision process (POMDP). By applying stochastic optimization methods, such as policy rollout, the POMDP is solved non...
conference paper 2021
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de Boer, Thies (author), Schöpe, M.I. (author), Driessen, J.N. (author)
The radar resource management problem in a multi-target tracking scenario is considered. Partially observable Markov decision processes (POMDPs) are used to describe each tracking task. Model predictive control is applied to solve the POMDPs in a non-myopic way. As a result, the computational complexity compared to stochastic optimization...
conference paper 2021
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Stouthamer, Esther (author), Erkens, Gilles (author), Cohen, Kim (author), Hegger, Dries (author), Driessen, Peter (author), Weikard, Hans Peter (author), Hefting, Mariet (author), Hanssen, R.F. (author), Fokker, Peter A. (author), Akker, Jan van den (author), van Rijswick, Marleen (author)
In the Netherlands land subsidence is a continuously ongoing process. Consequently, an increasing number of people and economic assets are exposed to subsidence, damage costs are soaring, and flood risk and greenhouse gas emissions are increasing. In some areas tipping points have already been reached, where current land-use can no longer be...
conference paper 2020
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