Elektrik- Elektronik Mühendisliği: Recent submissions

  • Design of a continuous-time current-mode sigma-delta analog-to-digital converter 
    Çitkaya, Ahmet Yasin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    The importance of the Analog-to-Digital converters (ADC) is increasing due to the necessity of an interface between the analog and digital world where computing and signal processing are executed. Over the last years, their ...
  • A new irregular clocked linear feedback shift register based stream cipher "go" 
    Çetiner, Gökçe. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    Stream ciphers are an important class of encryption algorithms. They encrypt individual characters (usually binary digits) of a plaintext message one at a time, using an encryption transformation which varies with time. A ...
  • A survey of superconductivity 
    Uluğ, Yusuf. (Thesis (M.S.)- Robert College. Faculty of Graduate School of Engineering, 1969., 1969.)
  • Voice driven keyword spotter 
    Çengelci, Onur. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    We designed a voice driven keyword spotter. To improve the success of the system, we made use of synthetically generated voice inputs in addition to natural voice inputs and used approximate string matching instead of exact ...
  • Analog design and optimization of PWL circuits used in fuzzy logic solutions 
    Yalçın, Yankı. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    Neural networks are widely used in all branches of life such as system identification, decision support and control where systems are designed to be working as human brain and make decisions like the way human beings do. ...
  • A novel sonar development platform: dual frequency sonar beam shaping for angular localization 
    Karadeniz, Murat. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    This thesis presents a complete airborne ultrasound system inspired by both underlying physics and biological sonar. First, a completely new hardware platform is designed and developed. This design supports an extendible ...
  • Audio source separation with convolutively mixed signals 
    Başaran, Doğaç. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    In this thesis, we addressed the problem of audio source separation of convolutivelymixed signals using microphone arrays. Independent Component Analysisis a major statistical tool for solving this problem. In real room ...
  • Radar cross section of arbitrary shared multilayered objects 
    Küstür, Sabri. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    This thesis is about Radar Cross Section (RCS) of arbitrary shaped multilayered objects. Arbitrary shaped objects have an important place in the study and application of Radar technologies. Aircrafts, missiles, vegetation ...
  • Time of arrival estimation with music under impulsive noise 
    Hacıoğlu, İsa. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    With the emergence of micro and nano technologies, the context-aware wirelesscommunications applications have been spreading. Especially, location-awareness hasgained significance recently. The TOA estimation have been ...
  • The design principles of linear feedback shift register based clock controlled stream ciphers 
    Ergüler, İmran. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    Stream ciphers are one of the most important classes of encryption algorithms usedto ensure security in digital communication. The design of many stream ciphers is based onuse of Linear Feedback Shift Registers (LFSRs), ...
  • A new real-time time memory trade-of attack on A5/ 1 stream ciphers using "peculiar events" 
    Yazgan, Onur. (Thesis (M.S)-Bogazici University.Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    In this paper, we describe a new real-time attack on A5/1 stream ciphers thatachieves superior performance in terms of lower computation time and calculation complexity compared to most of the previous attacks of similar ...
  • A synthesizable core generator design in VHDL for the motorola 68XXX family of microprocessors 
    Bürümcek, Alper. (Thesis (M.S)-Bogazici University.Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    The goal of this project is to implement a core generetor to create a Motorola68000 op-code compatible microprocessor capable of being synthesized using FPGA. The CPU is specified fully in VHDL and is designed to emulate ...
  • Investigation of the most suitable location finding techniques for Istanbul in GSM1800 network 
    Çelik, Veli Murat. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    Although there isn’t yet a successful deployment of a Location Services among the existing worldwide operators, locating the subscriber is still appealing, thus there are many ongoing studies on the topic. While locating ...
  • Comparison of multicarrier CDMA with successive interference cancellation and interference cancellation with gibbs sampler 
    Yılmaz, Murat. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    Recently Orthogonal Frequency Division Multiplexing (OFDM) has gained a lot ofattention and is the technology for Fourth Generation (4G) wireless systems because itpromises data rates up to 100 Mbps. A variation of OFDM ...
  • A study of behavior of dielectrics subject to weak electric fields 
    Göktuna, Erol. (Thesis (M.S.)- Robert College. Faculty of Graduate School of Engineering, 1969., 1969.)
    The aim of this report is to investigate dielectric behavior at weak electric field. The behavior of permittivity, a defining property of dielectric materials, at weak fields is mostly discussed. The theoretical approach ...
  • Active filter design with unity gain current cells 
    Erdoğan, Erdem Serkan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    In this thesis, the design of a current follower (CF) starting from the building stages as input, inversion and output, is presented together with the newly proposed circuit techniques to improve the performance of the CF ...
  • System level design of phase locked loops 
    Ak, Şeref Ersin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    Phase Locked Loops (PLLs) are extensively used in microprocessors and digital signal processors for clock generation and as frequency synthesizers in RF communication systems for clock extraction and generation of a low ...
  • Analysis of functional near infrared spectroscopy signals 
    Akgül, Ceyhun Burak. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    In recent years, positron emission tomography (PET) and functional magnetic resonance imaging (fMRI) have facilitated the monitoring of the human brain non-invasively, during functional activity. Nevertheless, the use of ...
  • Recognition of planar objects using multiresolution analysis 
    Güney, Nazlı. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2003., 2003.)
    Object recognition is one of the biggest problems in computer vision. In order to be able to solve this problem, many methods have been tried in the past. Wavelets, which have successfully been used in such areas as image ...
  • Fovea based coding for video streaming 
    Dikici, Çağatay. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    Attentive robots, inspired by human-like vision - are required to have visual systems with fovea-periphery distinction and saccadic motion capability. Thus, each frame in the incoming image sequence has nonuniform sampling ...