Searched for: department%3A%22Circuits%255C%2Band%255C%2BSystems%22
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Taal, A.J. (author)
This thesis presents a novel nanophotonic Metal-Insulator-Metal (MIM) grating structure that diffracts incident light by filtering colour based on interference. The grating creates two independent self-images (Talbot patterns) for two almost arbitrarily tuneable wavelengths in the visible spectrum. Lens-less imaging is promising for its ability...
master thesis 2017
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Saboerali, T. (author)
The MRI scanner with an ultrahigh magnetic field of 7T not only increases the image resolution but it also increases the Specific Absorption Rate (SAR) of the patient. In other words, the body temperature of the patient increases due to the absorption of heat produced by the 7T MRI scanner. This is dangerous for the health of the patient. In...
master thesis 2017
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Coutiño Minguez, M.A. (author)
Echoes generated by the sound reflected off the walls of a room carry information about the geometry of the enclosure. Capitalization of this acoustic property could lead to improvements in current state-of-the-art methods for sound field estimation, where prior information can be used to improve the conditioning of the problem. In this thesis,...
master thesis 2016
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Zhou, M. (author)
After the development in the past 120 years since the invention of the first radio transmission, worldwide wireless communication systems are nowadays part of daily life. Behind the shining and astonishing achievement of modern communication systems, the exhaustion of existing frequency spectrum resources has been a concern. In higher frequency...
doctoral thesis 2015
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Kumar, S.S. (author)
The sustained increase in computational performance demanded by next-generation applications drives the increasing core counts of modern multiprocessor systems. However, in the dark silicon era, the performance levels and integration density of such systems is limited by thermal constraints of their physical package. These constraints are more...
doctoral 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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Bruinsma, W.P. (author), Hes, R.P. (author), Kroep, H.J.C. (author), Leliveld, T.C. (author), Melching, W.M. (author), Aan de Wiel, T.A. (author)
This document describes the design process of a software toolkit to perform high-performance wideband spectrum sensing. A prominent application of this is Cognitive Radio, a technique that aims to make more efficient use of the available radio spectrum. An extensive theoretical analysis will be performed. Various non-uniform sampling techniques...
bachelor thesis 2015
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Bijwaard, M. (author)
Typically in synchronous digital systems time-based tasks are synchronized using hard-wired clock distribution networks. However in the growing application of large (wireless) sensor networks it is not always feasible to connect each sensor node to a hard-wired clock distribution network. Generally in such systems the sensor nodes are only...
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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Bloom, R. (author), Bonsema, C. (author), Wijtemans, L. (author)
In dit werk wordt het ontwerp en de implementatie beschreven van een systeem dat draadloos de transmissie van audiosignalen realiseert. Het systeem accepteert zowel analoge als digitale audiosignalen aan de ingang en biedt aan de uitgang het audiosignaal zowel als een digitaal als een analoog signaal. Het systeem is ontworpen rond een...
bachelor thesis 2014
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Gishkori, S.S. (author)
Wireless communications is undergoing massive development in all forms of its manifestations. In the field of short-range communications, technologies like ultra- wideband (UWB) systems are promising very high data rates, fine timing resolution and coexistence with other physical layer standards. Along with these benefits, the promise of low...
doctoral thesis 2014
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Geelhoed, J. (author)
In electronic warfare information about radio signals is gathered. Parameters as the direction-of-arrival (DOA) and the frequency can be estimated from sampled data received on antenna arrays. The objective of this thesis is to investigate the use of circular arrays for joint angle-frequency estimation (JAFE). A 1-D (azimuth and frequency) and 2...
master thesis 2014
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Masoud, A. (author), Warmerdam, K.P. (author)
In this work an implementation of a newly proposed indoor localization algorithm is described. The new algorithm is based on acoustic signals that are readily available in the environment and not intended for this purpose, called "signals of opportunity". The proposed algorithm is intended to be implemented on mobile devices running the Android™...
bachelor thesis 2013
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Zegov, L.T. (author)
Compressive sensing (CS) provides a new paradigm in data acquisition and signal processing in radar, based on the assumptions of sparsity of an unknown radar scene, and the incoherence of the transmitted signal. The resolution in the conventional pulse-compression radar is foreseen to be improved by the implementation of CS. An unknown sparse...
master thesis 2013
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Rajan, R.T. (author), Van der Veen, A.J. (author)
Synchronization and localization are critical challenges for the coherent functioning of a wireless network of mobile nodes. In this paper, a novel joint non-linear range and affine time model is presented based on two way time stamp exchanges, extending an existing affine time-range model. For a pair of nodes, a closed form pairwise least...
conference paper 2013
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Elsayed, A.H. (author)
In recent years, exciting new low-power design methods have been introduced, such as: multiple supply voltages, body bias techniques and power shut-off. In order to use these low power design methods, strict requirements for both libraries and tools are needed. An additional challenge is the introduction of more accurate characterization models...
master thesis 2012
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Shakeri, S. (author)
In this work a new location fingerprinting-based localization algorithm is proposed for an underwater medium by utilizing ultra-wideband (UWB) signals. In many conventional underwater systems, localization is accomplished by utilizing acoustic waves. On the other hand, electromagnetic waves haven't been employed for underwater localization due...
master thesis 2012
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Tamerus, P.D. (author)
Cryptographic devices are vulnerable to so-called Side Channel Attacks. As attackers become smarter, hardware designers and chip manufacturers need to keep up with the security demands against these Side Channel Attacks. Side Channel Attacks such as timing analysis, power consumption analysis or electromagnetic analysis, are based upon the...
master thesis 2012
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Michos, A. (author)
Transactional memory is a lock-free parallel programming model, which aims at replacing conventional lock-based threaded programming techniques, currently used by multi-core systems. These techniques are difficult to implement and impose unnecessary overheads caused by conservative programming practices. In this thesis, the scalability potential...
master thesis 2012
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Molenaar, M. (author)
Today’s production processes are more and more optimized to be competitive. The production demands are increased for speed and quality. These increased demands do not pass the roll shops in the steel industry. In the roll shop periodically the rolls from the rolling mill are checked for imperfections. The imperfections are detected by special...
master thesis 2012
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