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Wang, H. (author)Prior work of network coding is mainly focusing on multicast traffic. In this thesis, we propose a new network coding based communication algorithm called Network Coded Flooding (NCF) which is related to network wide broadcast. This designed algorithm is an integration of network coding and one of the commonly used broadcasting techniques in...master thesis 2009
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Ruggiano, M. (author), Stolp, E. (author), Van Genderen, P. (author)Orthogonal frequency division multiplexing (OFDM) waveforms offer strong advantages for integrated communication and radar systems. However, they exhibit inherent high-range sidelobes after matched filtering when standard communication constellation symbols are used for the coding of the carriers. Consequently, they require filtering at the...journal article 2009
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Ghaseminezhad Marandi, I. (author)The IEEE 802.11n standard is a promising technology for near future Wireless LAN's. By utilizing enhanced techniques like MIMO communication and OFDM digital modulation extremely high data rates over large distances are possible for wireless communications. Predecessors like 802.11b/g standards are succesfully outnumbered and a strong competitor...master thesis 2009
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Pawelczak, P. (author), Pollin, S. (author), So, H.S.W. (author), Bahai, A.R.S. (author), Prasad, R.V. (author), Hekmat, R. (author)In this paper, different control channel (CC) implementations for multichannel medium access control (MAC) algorithms are compared and analyzed in the context of opportunistic spectrum access (OSA) as a function of spectrum-sensing performance and licensed user activity. The analysis is based on a discrete Markov chain model of a subset of...journal article 2009
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Zhang Xin, X. (author)Nowadays, energy saving for wireless communication is more important than before. Lots of wireless devices are battery operated, like devices used in WLAN, ad hoc mode, sensor network, cellular network and so on. For example, Ad hoc networks which are composed of these wireless mobile devices can automatically establish peer to peer...master thesis 2009
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Doerr, C. (author), Grunwald, D. (author), Sicker, D.C. (author)In a network deployment, a cognitive radio will have to perform two fundamental tasks. First, each cognitive radio needs to optimize its internal operation, and second, it needs to derive a configuration that will enable and optimize communication with other nodes in the network. This latter requirement, however, relies on knowledge about the...journal article 2009
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Van Genderen, P. (author), Kovalenko, V. (author)Detection in most surveillance radars is based on the condition of point targets against a more or less homogeneous background. Currently, the resolution of many new types of radar is increasing, at least in the range dimension. Therefore many objects can no longer be considered as points. Also as a consequence, the background is becoming more...journal article 2009
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Babur, G. (author)The thesis consists of two parts. The first part is devoted to the theory of dual-orthogonal polarimetric radar signals with continuous waveforms. The thesis presents a comparison of the signal compression techniques, namely correlation and de-ramping methods, for the dual-orthogonal sophisticated signals. The novel time-frequency representation...doctoral thesis 2009
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Kleiberg, T.J. (author)During the past two decades the Internet has been widely deployed and integrated into the society, radically altering the way people communicate and exchange information. Although the Internet was intended as a research network between few a institutions in the United States, it has grown to take a central role in day-to-day communications and...doctoral thesis 2009
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Hoogeboom, P. (author), Van Vliet, F. (author)Under the auspices of the European Microwave Association (EuMA) the 11th annual European Microwave Week was organized in the Amsterdam RAI Congress Centre, The Netherlands, 27-31 October 2008. This major event consisted this year of five conferences, an exhibition, and various side events. The 38th European Microwave Conference (EuMC), the Third...journal article 2009
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- Maleki, S. (author) master thesis 2009
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- Pawelczak, P. (author) doctoral thesis 2009
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Schoonover, R.W. (author), Visser, T.D. (author)Recent studies of singularities in scalar wave fields in Young’s classic experiment are extended to electromagnetic fields diffracted by an N-pinhole interferometer. Linearly polarized fields whose direction of polarization may be different at each pinhole are examined. It is shown that for two pinholes, only surfaces of linear polarization are...journal article 2009
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Lakshmanan, M.K. (author), Nikookar, H. (author)The growing popularity of wireless applications has placed enormous burden on valuable resources such as spectral bandwidth. This has brought about a major revamp of traditional resource allocation policies culminating in an explosion of research activity in the field of cognitive radio (CR) (Mitola, Cognitive radio: an integrated agent...journal article 2009
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Verweij, M.D. (author), Huijssen, J. (author)The full-wave computation of transient acoustic fields with sizes in the order of 100x100x100 wavelengths by 100 periods requires a numerical method that is extremely efficient in terms of storage and computation. Iterative integral equation methods offer a good performance on these points, provided that the recurring spatiotemporal convolutions...journal article 2009
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De Hoop, A.T. (author), Lager, I.E. (author), Tomassetti, V. (author)A novel time-domain approach to the derivation of the pulsed electromagnetic field multiport antenna system reciprocity theorem is presented. The theorem interrelates the field and system properties in two states: the transmitting state and the receiving state. General time-domain Thevenin (voltage-source, impedance-based) and Norton (electric...journal article 2009
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Lakshmanan, M.K. (author), Nikookar, H. (author)Ultra wideband (UWB) wireless systems are highly susceptible to interference from other services. To reduce the effect of interference from co-existing sources such as the WLAN standard IEEE 802.11a on UWB Communication, the construction of a modified template waveform using multi-carrier sinusoids is proposed in Ohno and Ikegami (2003), Ohno et...journal article 2009
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Gunput, S.G. (author)Recently the need for ultra high data rate wireless networks has increased. With the improvement of CMOS technologies, 60 GHz WPANs has become more interesting commercially. 60 GHz radio operates at wave lengths in the order of millimeters at a frequency band between 57 and 64 GHz. The 802.15.3 MAC is specified to provide high data rate and also...master thesis 2009
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Van Dijk, T. (author), Schouten, H.F. (author), Visser, T.D. (author)We analyze the coherence singularities that occur in the far field that is generated by a broad class of partially coherent sources. It is shown that for rotationally symmetric planar quasihomogeneous sources the coherence singularities form a two-dimensional surface in a reduced three-dimensional space. We illustrate our results by studying the...journal article 2009
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Gu, Y. (author), Lo, A. (author), Niemegeers, I. (author)Recently, indoor positioning systems (IPSs) have been designed to provide location information of persons and devices. The position information enables location-based protocols for user applications. Personal networks (PNs) are designed to meet the users' needs and interconnect users' devices equipped with different communications technologies...journal article 2009