Searched for: department:"Circuits%5C+and%5C+Systems"
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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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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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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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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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Feenstra, C. (author)
As recon?gurable hardware such as FPGA’s become bigger and bigger, large and complex systems can be implemented in such devices. It becomes a challenge for engineers to manually convert an algorithm in an HDL, considering the pushing time-to-market constraints. High Level Synthesis tools are developed to make this process less laborious. HLS...
master thesis 2011
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Jagtap, R.S. (author)
Planar scaling of semiconductor ICs for achieving higher integration seems to be on the brink of saturation. As an alternative solution, three-dimensional (3D) integration follows a more than Moore strategy in which circuit layers are stacked vertically. Although, 3D integration technology has moved from Lab to Fab, a complete supply chain is...
master thesis 2011
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Kok, S. (author)
Wireless communications have numerous applications in terrestrial and space environ-ments, but for one environment the number of civil wireless applications is small. This is the uderwater environment where for wireless communications acoustic waves are used instead of electromagnetic waves. The underwater acoustic channel is a very difficult...
master thesis 2011
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Broeders, J.Z.M. (author)
Modern embedded systems are far to complex to describe their hardware and software at a low-level of abstraction. SystemC is a popular modeling language which can be used to specify systems at a higher abstraction level. The primary way to deal with complexity in SystemC is to apply modularization. The module hierarchy of a SystemC model is...
master thesis 2010
Searched for: department:"Circuits%5C+and%5C+Systems"
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