Browsing Ph.D. Theses by Title

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  • A generalized pareto front approach for performance estimation in analog design automation systems 
    Deniz, Engin. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    The design of analog circuits requires a deep insight into both physical and technological parameter interactions. In addition, every application of analog circuits has speci c constraints and requirements with large number ...
  • A high voltage triboelectric energy harvesting system utilizing parallel-SSHI rectifier and DC-DC converters for SUB-5 hz motions 
    Kara, İsmail. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    In this thesis, the first integrated circuit (IC) implementation of parallel synchronized switching harvesting on inductor (parallel-SSHI) is presented for triboelectric energy harvester targeting 1 Hz to 5 Hz mechanical ...
  • Achievable rates and transceiver design in ultra-wideband communications 
    Güney, Nazlı. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In a multipath dominated environment, ultra-wideband (UWB) systems that transmit trains of subnanosecond duration pulses exhibit the desirable property of fine resolution in time of the received paths, which as a result ...
  • Adaptive control of nonlinear systems using multiple identification models 
    Cezayirli, Ahmet. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Adaptive control of nonlinear systems is considered in this study. Available methods in this field are reviewed first. Focusing on the minimum-phase, input-output linearizable and linearly parameterized nonlinear systems, ...
  • Advanced techniques for the design of MIMO free space optical communication systems 
    Özbilgin, Tuğba. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Free space optical (FSO) communication is an effective alternative to radio frequency (RF) communication in terms of potential high data rates, cost efficiency and wide bandwidth on unregulated spectrum. However, FSO systems ...
  • Advanced transceiver design for continuous phase modulation 
    Özgül, Barış. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    This dissertation proposes advanced transceiver designs applying turbo and space-time (ST) concepts to continuous phase modulation (CPM), which is preferred in numerous power- and band-limited communication systems for its ...
  • Alternative arithmetic structures using redundant numbers and multi-valued circuit techniques 
    Çini, Uğur. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    Arithmetic circuits play a crucial role in VLSI technology. Arithmetic blocks are usually the most power consuming parts in a system since the switching activity is quite high. Alternative arithmetic implementations can ...
  • Analog circuit design automation against process variations and aging phenomena 
    Afacan, Engin. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Reliability of CMOS circuits has become a major concern due to substantially worsening process variations and aging phenomena in deep sub-micron devices. As a result, conventional analog circuit sizing tools have become ...
  • Asynchronous sigma-delta analog to digital converters 
    Kayaaltı, Balkır. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Analog to digital conversion is the process of translating analog real world signals to their corresponding binary encoded form which digital devices need. Among the examples for analog signal sources storage devices like ...
  • Autonomus multi-robot topological spatial cognition 
    Karaoğuz, Hakan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    This thesis is concerned with topological spatial cognition in multi-robot systems. With topological reasoning, continuous space is discretized into a set of places that are spatially related. Thus, topological spatial ...
  • Broadband power-line noise modeling and compensation 
    Güzel, Tayyar. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    Broadband power-line communication (BPLC) has become more popular in the Smart Grid context as it allows broadband access, media sharing, automated meter reading etc. However, it still remains as a challenging task to ...
  • Channel polarization with higher - order memory 
    Afşer, Hüseyin. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Channel coding is one of the most fundamental problems regarding the nature of communication. Polar codes, developed by Ar kan, were the rst demonstration of practical channel codes that provably achieve theoretical limits ...
  • Circuit level analog design automation 
    Sönmez, Özsun Serkan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    This thesis presents a simulation-based analog circuit synthesis methodology, its integration with system and layout level analog synthesis tools, and synthesis examples that were performed to validate the usefulness of ...
  • CMOS based optoelectronic catheter localization system for magnetic resonance imaging environment 
    Sarıoğlu, Baykal. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    The use of minimally invasive medical techniques has greatly reduced risks to patients and has increased our understanding of how the body works. Detection of catheters is one of the most important tasks in these techniques. ...
  • Consensus based power control algorithms for heterogenous networks 
    Şenel, Kamil. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The resource allocation problem is crucial for unveiling the potential of heterogeneous networks. The demand for higher data rates from an increasing number of devices compels the operators to look for solutions beyond the ...
  • Content based medical image retrieval 
    Marvasti, Neda Barzegar. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Fast technological developments of di erent medical imaging and data collection techniques increase the expectation of more accurate interpretations and diagnoses of radiologists. However, to carefully analyze the resulting ...
  • Convergence rate analysis and optimization of distributed consensus algorithms 
    Cihan, Onur. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The problem of achieving a common value in a distributed information sharing context, referred to as distributed consensus or agreement, is an important topic that has drawn significant research attention of late. Consensus ...
  • Cross-lingual voice conversion 
    Türk, Oytun. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    Cross-lingual voice conversion refers to the automatic transformation of a source speaker’s voice to a target speaker’s voice in a language that the target speaker can not speak. It involves a set of statistical analysis, ...
  • Current-model CMOS sequential multiple-valued logic circuits 
    Sarıca, Fatma. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    The use of circuits with more than two logic levels, named as Multiple-Valued Logic (MVL) circuits, have a potential for reducing chip area consumed by interconnection wiring and functional units in Very-Large Scale ...
  • DDoS attack detection using signal processing and statistical approaches 
    Erhan, Derya. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    DDoS attacks cause a variety of changes in the properties of the attributes in the network traffic. Modeling these changes using signal processing and statistical ap proaches provides detection of these attacks. This thesis ...

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