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Maheshwari, D. (author)Offshore Communication Networks utilize multiple of communication technologies to eradicate any possibilities of failures, when the network is operational. Offshore Oil and Gas platforms and Wind parks (manned / unmanned) have strict and tight requirements for robust communication. Robustness of communication networks can be evaluated by the...master thesis 2010
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Wang, J. (author), Prasad, R.V. (author), Niemegeers, I. (author)With the increase in the capacity of mobile communication devices, it is but natural to expect that these devices would work ubiquitously anywhere anytime to offer high data rate support. Recently 60 GHz frequency band has been identified as an obvious choice for the high data rate indoor communications. However, as the 60 GHz radio system...journal article 2010
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Liu, D. (author), Wang, H. (author), Van Mieghem, P. (author)In recent years, many network perturbation techniques, such as topological perturbations and service perturbations, were employed to study and improve the robustness of complex networks. However, there is no general way to evaluate the network robustness. In this paper, we propose a global measure for a network, the reconstructability...journal article 2010
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Otto, T. (author), Russchenberg, H.W.J. (author)In 2007, IRCTR (Delft University of Technology) installed a new polarimetric X-band LFMCW radar (IDRA) at the meteorological observation site of Cabauw, The Netherlands. It provides plan position indicators (PPI) at a fixed elevation with a high range resolution of either 3 m or 30 m at a maximum observation range of 1.5 km and 15 km,...journal article 2010
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Huijssen, J. (author), Verweij, M.D. (author)The development and optimization of medical ultrasound transducers and imaging modalities require a computational method that accurately predicts the nonlinear acoustic pressure field. A prospective method should provide the wide-angle, pulsed field emitted by an arbitrary planar source distribution and propagating in a three-dimensional, large...journal article 2010
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Gu, Y. (author), Prasad, R.V. (author), Niemegeers, I.G.M.M. (author)A Personal Network (PN) is a user-centric design interconnecting numerous devices belonging to a user in different geographic locations, such as home, office, car, etc., to form a single global network to offer fully personalized services. In PNs devices of the user move in different groups, where these groups merge and split. In this paper, we...journal article 2009
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Fernández Pantoja, M. (author), Yarovoy, A.G. (author), Rubio Bretones, A. (author), González García, S. (author)This paper presents a procedure to extend the methods of moments in time domain for the transient analysis of thin-wire antennas to include those cases where the antennas are located over a lossy half-space. This extended technique is based on the reflection coefficient (RC) approach, which approximates the fields incident on the ground...journal article 2009
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Kooij, R.E. (author), Klos, V.B. (author), Godana, B.E. (author), Nicolai, F.P. (author), Ahmed, O.K. (author)Nowadays various digital television services are available. However, the user of these services experiences longer delays than the traditional analog TV while switching from channel to channel. The digital TV operator usually displays a black screen with the channel number during zapping. However, it could be interesting for the TV viewer, if...journal article 2009
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Budiarjo, I. (author)Cognitive Radio is a new paradigm in the wireless communications. It puts the intelligence and awareness dimension to the radio communication system. A Cognitive Radio system will be aware of the changing condition in its environment. The awareness in this thesis is related to the spectrum and the channel stipulation. By intelligent learning and...doctoral thesis 2009
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Van den Dungen, F.W. (author)A key element of the operational concept of the air traffic management modernization program SESAR (‘Single European Sky ATM Research’) is managing air traffic through 4D-trajectories that are based on the three spatial dimensions plus time. This master thesis treats the early stage of the design of an airborne human machine interface for...master thesis 2009
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Figueras i Ventura, J. (author)The impact of the increase in anthropogenic aerosols on the global climate and the precipitation cycle is not yet fully understood. One of the reasons for that is the lack of sound measurements. In particular, high temporal and spatial resolution measurements of precipitation, coupled with measurements from other instruments, would be desired to...doctoral thesis 2009
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Budko, N.V. (author)Analytical solutions are presented for the electromagnetic radiation by an arbitrary pulsed source into a homogeneous time-varying background medium. In the constant-impedance case an explicit radiation formula is obtained for the synchronous permittivity and permeability described by any positive function of time. As might be expected, such a...journal article 2009
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Wu, J. (author)Complex networks describe a wide range of systems and structures in the world. Any real network can be modeled as graph, expressed by an adjacency matrix or list. In many complex networks, when a graph of a certain type grows in size, its properties are expected to change. Each complex network presents specific topological features which...master thesis 2009
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Rao, V.S. (author)Cognitive Radios (CRs) address the problems of spectrum scarcity and under-utilization of the spectrum. However, realizing a CR network is neither easy nor straight-forward. The link layer in CR Ad hoc Networks is responsible for allocating suitable channels, out of the currently available channels. It is also responsible for setting up...master thesis 2009
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Hao, J. (author)By simulating the integrated networks with multiple gateways and TCP flows, we get the unfairness in the HSDPA and IEEE 802.11 integrated networks. The unfairness has two sources: the HSDPA cellular subnetwork and the IEEE 802.11 subnetwork. A novel scheduling algorithm - Multi-hop Aware Scheduling has been proposed to resolve the unfairness...master thesis 2009
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Lam, L. (author), Koç, Y. (author)This bachelor thesis is written for the bachelorproject 'Where is my baby?'. This is one of the three thesis for the project, describing the technology choices, hardware design and concept demonstration of the ChildFinder. The ChildFinder is device that keeps an eye on children.bachelor thesis 2009
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Blocq, G. (author), Simons, C. (author)In deze thesis gaat het voornamelijk over het multipatheffect en over de algoritmes die gebruikt worden om een betere benadering van de positie van de bron te krijgen. Het totale project van de gehele groep gaat over een positioneringsysteem genaamd ChildFinder. De thesis is in duidelijke delen verdeeld. Eerst wordt voornamelijk theorie...bachelor thesis 2009
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Simeoni, M. (author), Lager, I.E. (author), Coman, C.I. (author), Roedener, A.G. (author)A method for ensuring polarization agility in conjunction with beam steering in planar array antennas is proposed. It relies on interleaving two subarrays with orthogonal, linear polarizations that, together, can generate arbitrary polarization states: adjustable linear, elliptical, and left- or right-handed circular. The complexity of the...journal article 2009
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Peddemors, A.J.H. (author)In the past several years, personal mobile devices have developed rapidly as versatile computing platforms, capable of installing and running many different applications. Often, these devices are equipped with multiple (wireless) network interfaces supporting internet access through one or more networks. The availability of these networks is...doctoral thesis 2009
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Rizvi, U.H. (author), Janssen, G.J.M. (author), Weber, J.H. (author)In this letter, closed-form expressions for the bit error rate of M-ary pulse amplitude modulated signal constellations as a function of the analog-to-digital converter word length, the signal-to-noise ratio and the fading distribution, are derived. These results allow for a rapid and accurate evaluation of the system performance when the analog...journal article 2009