Elektrik- Elektronik Mühendisliği: Recent submissions

  • Fabrication and testing of polymer thin film transistors for basic digital circuits 
    Mert, Orhan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In this thesis we developed fabrication and characterization methods for polymer thin lm transistors(PTFTs) and circuits. After analysis of the various aspects related to the PTFTs, we propose a new method to fabricate ...
  • High performance adaptive sigma delta modulator designs 
    Kurşunoğlu, Sedef. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Improvements in VLSI technology enabled data converters with increased speed. When compared to conventional converters, sigma delta modulators have a higher sampling speed for resolution; and they are less sensitive to ...
  • Afronoc: an adaptive flexible network on chip router 
    Çoğal, Ömer. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    As the complexity of on-chip systems grows, scalability and re-configurability becomes an important issue in both system and interconnection levels for SoC systems. Flexible and configurable architectures bring the advantage ...
  • Bootstrapping a speech recognition system by using video text recognition 
    Som, Temuçin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In the broadcast news for the hearing impaired, the information is conveyed by three modalities: speech, sign language and sliding video text. In this work, we propose an HMM-based sliding video text recognition (SVTR) ...
  • Multiple input multiple output transmission techniques and link adaptation in wireless systems with dual-polarized antennas 
    Kılıç, Yakup. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The use of dual-polarized antennas theoretically double the number of virtual antennas used in the system. On the other hand, the correlation effects and the crosspolar discrimination (XPD) deteriorates the system performance. ...
  • Channel allocation system for wireless video communication in 802.11n MESH networks 
    Tekincan, Sinan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    With the latest technological achievements, wireless communication is spreading all around the world and entering into the daily life of individuals more. Especially with the development of 802.11n standard, high data rate ...
  • Design of M6800 based extendable, general purpose microcomputer 
    Ekinci, Firuzan. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    The purpose of this thesis is the realization of a M6800 based extendable, self contained microcomputer system. A microcomputer is a microprocessor together with a memory and input/output channels for communication with ...
  • Design af active localization system front-end building blocks for MR-guided interventional procedures 
    Gerçek, İsmail. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In interventional procedures imaging plays an important role, as quick and accurate determination of the interventional device position and tissue structures are crucial for the procedure. Usually interventional procedures ...
  • Robust speech hashing 
    Şahin, Ekin Olcan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In this thesis, a robust speech hashing algorithm is proposed and performance of this speech hashing algorithm is compared with several robust audio hashing algorithms. We use phone based frequency-time domain analysis for ...
  • Power aware switched capacitor integrator design 
    Korkmaz, Seyrani. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Switched Capacitors are used as resistors because they have better accuracy and they consume less die area than other resistor implementations in integrated circuits. In this technique, a capacitor is charged and discharged ...
  • Comparison of single and multi frame super resolution reconstruction algorithms with analytical interpolation methods 
    Özdemir, Hüseyin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Generating high resolution image (or image sequence) from low resolution image (or image sequence) has various applications such as image expansion, printing and conversion between different resolution formats. There is a ...
  • Adaptive optimization of EDCA parameters for QOS in multimedia applications 
    Çil, Alparslan Mustafa. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The MAC layer of the IEEE 802.11 standard defines Distributed Channel Function (DCF), that provides simple and effective medium access mechanism. However with the increasing demand in multimedia applications and higher ...
  • Location estimation using RSS measurements with unknown path loss exponents 
    Zeytinci, Musa Bora. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In cellular networks, the location of an MS can be estimated using received signal strength (RSS) measurements from the control channels of several base stations. RSS-based location estimation techniques provide a low-cost, ...
  • Sigma-delta dithering based frequency synthesis and modulation for DCS-1800 
    Atasoy, Oğuz. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Today cell phone industry tends to increase the capabilities of the cell phones and at the same time minimize the cost. This trend reflects itself to frequency synthesizer design. Hence, a cheap and efficient way of designing ...
  • Distributed synchronization in delayed and topology varying networks 
    Cihan, Onur. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    There are numerous network applications where nodes require a common notion of time, and as such distributed synchronization is an important task in topology varying networks. In this thesis, we introduce a well known ...
  • Microwave propagation predictions on radio coverage of UMTS 
    Yelen, Satı. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The success story of GSM system is very well known throughout the world. The reason for its success is due to its ability to give services to its users anywhere and anytime. In fact, GSM basically gives speech services. ...
  • Microprocessor controlled single phase to single phase cycloconverter 
    Baş, M. Serdar. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    The object of this thesis is to design and construct a microprocessor-conrolled cycloconverter. The microprocessor is used to generate the gating signals for a single phase to ignle phase cycloconverter, the thyristors ...
  • A comparison of identification techniques for fractional order systems 
    Şenyuva, Rıfat Volkan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    This thesis compares the performances of various identification methods of deterministic and linear systems described by fractional order models. A detailed introduction to fractional calculus and fractional differential ...
  • Bayesian methods for deconvolution of sparse processes 
    Yıldırım, Sinan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In this work, various Bayesian methods for deconvolution and blind deconvolu- tion of sparse processes are studied. By using the prior assumption of sparsity, decon- volution and blind deconvolution operations are mapped ...
  • Conversion of current mode continuous time sigma delta converters from 1 bit to 3 bits 
    Akçakaya, Feyyaz Melih. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Sigma delta analog digital converters which are widely used in electronics are gradually achieving faster speeds and lower power consumption. The most important factor that affects speed and power consumption is the type ...