Searched for: mods_note_programme_s%3A%22Telecommunications%22
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Fernández Lezaun, A. (author)
A pulsed-field, time-domain study of a loop-to-loop configuration in a layered medium is effectuated for assessing the feasibility of near-field, pulsed-field, ultra-high data-rate, wireless transfer. In view of ensuring the accuracy and effectiveness of the study, the problem is subdivided into subproblems of increasing complexity. Firstly, a...
master thesis 2017
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Boelhouwer, W.L. (author)
A frequency-pattern reconfigurable antenna based on a foreshortened non-radiative dielectric (NRD) waveguide structure with a tunable liquid crystal dielectric is proposed. The antenna operates within the full range of the unlicensed 60G-band. The antenna is fed by a stripped semi-rigid coaxial feed that is inserted directly into the liquid...
master thesis 2016
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Zhou, S. (author)
Photoconductive antennas (PCA) are widely used in contemporary THz systems, especially in terahertz time-domain spectroscopy. They are used to radiate and receive THz power. The study of the generation and reception of THz radiation involves both semiconductor theory, electromagnetics, and antenna theory. In this work, after a review of some...
master thesis 2015
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Chen, C. (author)
The pervasiveness of the Internet and smartphones enables individuals to participate in online social networks such Twitter and Facebook, besides the classic physical contact network. Such multi-layer network allows for feedback between networks / layers. For instance, the spread of a biological disease such as Ebola in a physical contact...
master thesis 2015
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Majid, A.Y. (author)
master thesis 2015
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Rao, S. (author)
Direction-of-arrival (DOA) estimation of acoustic sources is of great interest in a number of applications. Acoustic vector sensors (AVSs) provide an edge over traditional scalar sensors since they measure the acoustic velocity field in addition to the acoustic pressure. It is known that a uniform linear array (ULA) of M conventional scalar...
master thesis 2015
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Van Berkel, S.L. (author)
In this contribution, a quasi-analytical model is proposed allowing for fast characterization of a wide variety of printed transmission lines in terms of characteristic impedance, effective dielectric constant and losses. These losses are composed out of conductor losses, dielectric losses and radiation losses due to space and surface wave...
master thesis 2015
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Naghibzadeh, S. (author)
Providing automated granular control of lighting, along with user-driven control, results in an energy-efficient smart lighting system design while catering to personal occupant preferences. Two functional ingredients in such a system are: (i) sensing that provides granular information on occupant location, and (ii) a communication system to...
master thesis 2014
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Kadathanad, S.R. (author)
Multiple-input multiple-output (MIMO) radars achieve improved performance by the simultaneous transmission and reception of waveforms from different locations. Orthogonality of the transmitted waveforms is a requirement for allowing waveform separation at the receiver. In addition, signals with a large BT- product (e.g. coded signals) could be...
master thesis 2013
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Mensingh, J.D. (author)
One of the engineering challenges in high-field MRI is to have a homogeneous distribution of the RF magnetic field inside human tissue. In this project we develop a design tool for a HEM wrist applicator that has the ability to generate a homogeneous magnetic field inside human wrist. By taking into account the dominant RF scattering effects...
master thesis 2013
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De Heer, P. (author)
The appearance of severe signal drop-outs in abdominal Magnetic Resonance Imaging at 3 Tesla arises primarily from areas of very low magnetic flux density B1 of the transmit field in the body, and is problematic in both obese as well as very thin subjects. In this study, we show how thin patient-friendly pads containing new high permittivity...
master thesis 2012
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Tessema, N.M. (author)
The wide deployment of wireless sensor nodes for varieties of applications calls the need for distributed beamforming as a cooperative scheme to efficiently use spectrum, to improve communication range and to save precious battery power during transmission. Given that there are a large set of cooperative cognitive radio users, ensuring the...
master thesis 2012
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Sridharan, V. (author)
Non-coherent on-off keying (OOK) receivers are preferred in ultra low power (ULP) wireless devices as they consume less power when compared to receivers based on other modulation schemes. However, these devices are highly susceptible to co-channel interference (CCI). Therefore, interference cancellation (IC) techniques for ULP non-coherent OOK...
master thesis 2012
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Van Kester, S. (author)
Online social networks showed an enormous growth in the last decade. With the rise of online social networks such as Twitter and Facebook, researchers got the opportunity to access the data of social behavior of millions of people, whereas in the past it was limited to hundreds of people. For these researchers and marketeers it is of great...
master thesis 2011
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Huang, Z. (author)
In the development of wireless sensor networks, power consumption is one of the bottlenecks for wide applications. In order to improve the energy efficiency of wireless sensor networks, a wakeup radio scheme is presented. The main transceiver that is responsible for data communication is in the sleep mode most of the time. An additional device...
master thesis 2011
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Bajpai, A. (author)
Wavelet Packet Modulation (WPM) is a multicarrier modulation technique like the well-established Orthogonal Frequency Division Multiplexing (OFDM). It has several advantages over OFDM, such as flexibility of operation and excellent localization in frequency. The Channel Equalization for WPM is new and an unexplored research area. It is also...
master thesis 2011
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Veres, T.Z. (author)
master thesis 2011
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Apeldoorn, M.A. (author)
Radio telescopes are quite often used for astronomy. Since these telescopes are wideband systems, they encounter standing waves between the reflector and the feed. This interaction has been studied by investigation the radar cross section (RCS) of the feed and the effect the standing waves have on the antenna performance (gain and beamwidth).
master thesis 2011
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Ajagbe, A.O. (author)
The goal of this project is to analyze video calls over the Internet Protocol (Video over IP) using a simulated IMS environment (IMS-in-a-box). The thesis presents an overview of IMS, its purpose and how it has evolved. The thesis also attempts to give the reader a full and comprehensible understanding of what the IMS is all about, its purpose...
master thesis 2010
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Altin, I.A. (author)
We present new low complexity decoders for LDPC codes by improving existing methods.
master thesis 2010
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