Theses - Department of Electrical and Electronics Engineering
Faculty of Engineering
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Development of an experimental image processing tool and flow-cytometry based electromagnetic scattering analysis for medical diagnosis of red blood cell pathology
(Bilkent University, 2020-11)The morphological, biophysical and biochemical properties of biological cells are critical markers for many fields, including life sciences, medical diagnosis, etc. Label-free, high-throughput classification and detection ... -
Innovative designs of RF transmit array coils and RF heating analysis of patients with implanted DBS
(Bilkent University, 2020-11)A safe and efficient magnetic resonance imaging (MRI) test would rely on informed specification, design, implementation, assessment, and application of appropriately selected radiofrequency (RF) coils. Towards these ... -
Selection field induced artifacts in magnetic particle imaging and a novel framework for nanoparticle characterization
(Bilkent University, 2020-11)Magnetic particle imaging (MPI) is a recent imaging modality that uses nonlinear magnetization curves of the superparamagnetic iron oxides. One of the main assumptions in MPI is that the selection field changes linearly ... -
Fast and efficient solutions of multiscale electromagnetic problems
(Bilkent University, 2020-11)Frequency-domain surface integral equations (SIEs) used together with the method of moments (MoM), and/or its accelerated versions, such as the multilevel fast multipole algorithm (MLFMA), are usually the most ... -
Frequency response analysis and reconstruction weighting schemes for MR elastography
(Bilkent University, 2020-09)Magnetic resonance elastography (MRE) non-invasively and quantitatively assesses the elasticity of the in-vivo tissue. In MRE, shear waves are induced to the tissue by an actuator, while phase-contrast images are obtained ... -
Contextual multi-armed bandits with structured payoffs
(Bilkent University, 2020-09)Multi-Armed Bandit (MAB) problems model sequential decision making under uncertainty. In traditional MAB, the learner selects an arm in each round, and then, observes a random reward from the arm’s unknown reward ... -
Multiple-precision MLFMA for efficient and accurate solutions of broadband electromagnetic problems
(Bilkent University, 2020-08)The multilevel fast multipole algorithm (MLFMA) is a popular full-wave electromagnetic solver that enables the solution of electrically large problems with an extremely large number of unknowns. As with all computational ... -
Novel techniques and innovative designs for the RF chain of magnetic resonance imaging scanners
(Bilkent University, 2020-08)In this dissertation, novel techniques and innovative designs are proposed to serve one of the main goals of MRI, which is achieving the best image quality by improving signal-to-noise ratio (SNR) while confined to the ... -
Dynamic decoupling and noise analysis for simultaneous transmission and reception imaging
(Bilkent University, 2020-08)In simultaneous transmission and reception (STAR) MRI, along with the coupling of the excitation pulse to the received signal, noise, and undesired distortions (spurs) coming from the transmit chain also leak into the ... -
Polar Reed-Solomon concatenated codes for optical communications
(Bilkent University, 2020-08)A concatenated forward error correcting (FEC) code is developed by targeting optical communications. Polar and product Reed-Solomon (RS) codes are used as inner and outer codes, respectively. An interleaver block is designed ... -
Dielectric metasurfaces as passive radiative coolers, colorimetric refractive index sensors, color filters, and one-way perfect absorber/reflectors with transparent sidebands
(Bilkent University, 2020-07)Metamaterials define the class of synthetic, man-made materials with exotic properties that cannot be observed with natural materials. Their sub-wavelength counterparts are called metasurfaces. In particular, dielectric ... -
Fast and robust solution techniques for large scale linear least squares problems
(Bilkent University, 2020-07)Momentum Iterative Hessian Sketch (M-IHS) techniques, a group of solvers for large scale linear Least Squares (LS) problems, are proposed and analyzed in detail. Proposed M-IHS techniques are obtained by incorporating the ... -
Colloidal optoelectronics of self-assembled quantum well superstructures
(Bilkent University, 2020-07)Advances in the colloidal nanocrystal synthesis enabled creation of quasi twodimensional colloidal quantum wells (CQWs) in the last decade. These CQWs possess similar properties to those of epitaxially grown quantum wells ... -
GaN HEMT based MMIC design and fabrication for Ka-band applications
(Bilkent University, 2020-08)Gallium Nitride (GaN) technology has recently dominated the high power applications in the mm-wave frequencies, and its commercial use is emerging with the upcoming 5G technology. High Electron Mobility Transistors (HEMTs) ... -
Advanced asynchronous random access protocols
(Bilkent University, 2020-08)Fifth generation wireless systems and beyond require linking an enormous number of simple machine type devices leading to a new wave of interest in massive machine type communications (mMTC). Different from the human-centric ... -
Rapid and robust image reconstruction for magnetic particle imaging
(Bilkent University, 2020-07)Magnetic Particle Imaging (MPI) is a rapidly developing medical imaging modality, which can image with high resolution, contrast, and sensitivity the spatial distribution of superparamagnetic iron oxide nanoparticles. ... -
Envelope tracking RF power amplifier design
(Bilkent University, 2020-06)In modern wireless communication systems, the requirement of achieving high data rates results in non-constant envelope signals with high peak to average power ratio (PAPR). However, the operation of conventional power ... -
Optimization and machine learning in MRI: applications in rapid MR image reconstruction and encoding models of cortical representations
(Bilkent University, 2020-03)Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging modality that is widely used by clinicians and researchers to picture body anatomy and neuronal function. However, long scan time remains a major problem. ... -
Cost constrained sensor selection and design for binary hypothesis testing
(Bilkent University, 2020-03)We consider a sensor selection problem for binary hypothesis testing with costconstrained measurements. Random observations related to a parameter vector of interest are assumed to be generated by a linear system corrupted ... -
Analytical model and design of load modulated balanced amplifier
(Bilkent University, 2020-02)RF power amplifiers (PA) with high efficiency and linearity are in high demand for modern communication systems. Modulated signals having a high peakto-average power ratio (PAPR) require PA’s to maintain these features in the ...
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