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Wang, Y. (author), Leus, G. (author), Van der Veen, A.J. (author)A complete detection, channel estimation, synchronization, and equalization scheme for a transmitted reference (TR) ultra-wideband (UWB) system is proposed in this paper. The scheme is based on a data model which admits a moderate data rate and takes both the interframe interference (IFI) and the intersymbol interference (ISI) into consideration...journal article 2009
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Bellusci, G. (author), Janssen, G.J.M. (author), Yan, J. (author), Tiberius, C.C.J.M. (author)A statistical model for the range error provided by TOA estimation using UWB signals is given, based on UWB channel measurements between 3.1 and 10.6?GHz. The range error has been modeled as a Gaussian random variable for LOS and as a combination of a Gaussian and an exponential random variable for NLOS. The distance and bandwidth dependency of...journal article 2009
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Budko, N.V. (author)Since the 1983 definition of the speed of light in vacuum as a fundamental constant with the exact value of 299 792 458 m/s the question has remained as to what apart from the wave front travels at that speed. It is commonly assumed that the entire electromagnetic waveform in free space does. Here it is demonstrated, both theoretically and...journal article 2009
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Otto, T. (author), Lu, J. (author), Chandra, M. (author)Polarisation diversity in radar remote sensing proved to be very successful in a variety of applications. Hydrometeors as raindrops or ice crystals are anisotropic radar targets giving rise to the use of polarisation diversity in weather radars. One advanced polarimetric weather radar is DLR's POLDIRAD in Oberpfaffenhofen. The huge data archive...journal article 2009
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Viganó, M.C. (author), Toso, G. (author), Caille, G. (author), Mangenot, C. (author), Lager, I.E. (author)A deterministic procedure to design a nonperiodic planar array radiating a rotationally symmetric pencil beam pattern with an adjustable sidelobe level is proposed. The elements positions are derived by modifying the peculiar locations of the sunflower seeds in such a way that the corresponding spatial density fits a Taylor amplitude tapering...journal article 2009
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- Budiarjo, I. (author), Nikookar, H. (author), Ligthart, L.P. (author) journal article 2008
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Budiarjo, I. (author), Nikookar, H. (author), Ligthart, L.P. (author)This article presents the performance comparison of TDCS and OFDM based cognitive radio for MIMO system using VBLAST receiver architecture to reconstruct the transmitted data. The interference avoidance performance in terms of BER and bitrate are improved by adding multiple antennas to the system and the use of V-BLAST technique at the receiver....journal article 2008
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Savelyev, T.G. (author), Yarovoy, A.G. (author), Ligthart, L.P. (author)This paper presents a 3-D imaging technique for an ultra-wideband (UWB) ground penetrating radar (GPR) with a single transmit antenna and a linear receive array. The video impulse GPR working in the frequency band of 0.3–3 GHz has been designed in IRCTR for landmine detection, i.e., for a near-field application. Installed on a vehicle it can...journal article 2008
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Prasad, R.V. (author), Pawelczak, P. (author), Hoffmeyer, J.A. (author), Berger, H.S. (author)This article discusses recent standardization efforts related to cognitive radio focusing on the work of IEEE Standards Coordinating Committee 41, formerly known as IEEE 1900. Some important tasks to be performed by the CR standardization community also are presented. These tasks will expedite the introduction of CR devices to the market while...journal article 2008
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- Shenario Ezhil, A. (author) master thesis 2008
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- Wang, H. (author), Martin Hernandez, J. (author), Van Mieghem, P. (author) journal article 2008
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Roebeling, R.A. (author), Placidi, S. (author), Donovan, D.P. (author), Russchenberg, H.W.J. (author), Feijt, A.J. (author)Partly due to aerosol effects stratocumulus clouds vary considerably in liquid water path (LWP), geometrical thickness (h) and droplet number concentration (Nc). Cloud models have been developed to simulate h and Nc using satellite retrieved cloud optical thickness (?) and effective radius (re) values. In this paper we examine the consistency...journal article 2008
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Weber, J.H. (author), Abdel-Ghaffar, K.A.S. (author)The performance of iterative decoding techniques for linear block codes correcting erasures depends very much on the sizes of the stopping sets associated with the underlying Tanner graph, or, equivalently, the parity-check matrix representing the code. In this correspondence, we introduce the notion of dead-end sets to explicitly demonstrate...journal article 2008
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Cempaka Wangi, N.I. (author), Prasad, R.V. (author), Jacobsson, M. (author), Niemegeers, I. (author)With the advent of smaller devices having higher computational capacity and wireless communication capabilities, the world is becoming completely networked. Although, the mobile nature of these devices provides ubiquitous services, it also poses many challenges. In this article, we look in depth at the problem of addressing in wireless ad hoc...journal article 2008
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- Pausini, M. (author) doctoral thesis 2007
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Wang, J. (author), Pouwelse, J. (author), Fokker, J. (author), De Vries, A.P. (author), Reinders, M.J.T. (author)We introduce personalization on Tribler, a peer-to-peer (P2P) television system. Personalization allows users to browse programs much more efficiently according to their taste. It also enables to build social networks that can improve the performance of current P2P systems considerably, by increasing content availability, trust and the...journal article 2007
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Dang, B.L. (author), Venkatesha Prasad, R. (author), Niemegeers, I. (author)Radio over Fiber (RoF) techniques have been long recognized as the promising solution for indoor networking at millimeter-wave bands. We discuss the possible deployment scenarios of an RoF network for indoor environment. In this paper, we try to find the answer to the question as to which Medium Access Control (MAC) protocol is suitable for an...journal article 2006
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Yarovoy, A. (author), Pugliese, R. (author)The impact of an azimuthal slot in the antenna flair on the performance of a bowtie antenna has been analyzed. It has been shown that the slot is equivalent to resistance-capacitance loading. The resistance of the slot is physically caused by radiation of electromagnetic energy from the slot. Equivalent resistance and capacitance of the slot...journal article 2006
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Tadema, J. (author), Koeners, J. (author), Theunissen, E. (author)In the past fifteen years, several research programs have demonstrated potential advantages of synthetic vision technology for manned aviation. More recently, some research programs have focused on integrating synthetic vision technology into control stations for remotely controlled aircraft. The contribution of synthetic vision can be divided...conference paper 2006
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De Hoop, A.T. (author), Lam, C.H. (author), Kooij, B.J. (author)Closed-form analytic time-domain expressions are obtained for the acoustic pressure associated with the reflection of a monopole point-source excited impulsive acoustic wave by a planar boundary with absorptive and dispersive properties. The acoustic properties of the boundary are modeled as a local admittance transfer function between the...journal article 2005