Now showing items 580-599 of 724

    • Robust adaptive filtering algorithms for impulsive noise environments 

      Aydin, Gül (Bilkent University, 1996)
      In this thesis, robust adaptive filtering algorithms are introduced for impulsive noise environments which can be modeled as o;-stable distributions and/or c-contarninated Gaussian distributions. The algorithms are ...
    • Robust compressive sensing techniques 

      Teke, Oğuzhan (Bilkent University, 2014)
      Compressive Sensing theory details how a sparsely represented signal in a known basis can be reconstructed from an underdetermined linear measurements. However, in reality there is a mismatch between the assumed and the ...
    • Robust estimation of unknowns in a linear system of equations with modeling uncertainties 

      Chebil, Fehmi (Bilkent University, 1997)
      Robust methods of estimation of unknowns in a linear system of equations with modeling uncertainties are proposed. Specifically, when the uncertainty in the model is limited to the statistics of the additive noise, ...
    • Robust fault detection by simultaneous observers 

      Ammar, Nejib (Bilkent University, 2000)
      This thesis addresses the problem of fault detection and isolation in linear systems based on unknown input observers. Functional disturbance decoupled observers which estimate specified or unspecified linear functions ...
    • Robust minimax estimation applied to kalman filtering 

      Aybar, Bahadır (Bilkent University, 2008)
      Kalman filtering is one of the most essential tools in estimating an unknown state of a dynamic system from measured data, where the measurements and the previous states have a known relation with the present state. It ...
    • Robust sampled data control 

      Ocalı, Ogan (Bilkent University, 1990)
      Robust control of uncertain plants is a major area of interest in control theory. In this thesis, robust stabilization of plants under a class of structural perturbations using sampled-data controllers is considered. It ...
    • Robust sampled-data control 

      Ocalı, Ogan (Bilkent University, 1995)
      Robust control of uncertain plants is a major area of interest in control theory. In this dissertation, robust stabilization of plants under various classes of structural perturbations using sampled-data controllers is ...
    • Robustly and strongly stabilizing low order controller design for infinite dimensional systems 

      Yücesoy, Veysel (Bilkent University, 2018-07)
      This thesis deals with the robust stabilization of in nite dimensional systems by stable and low order controllers. The close relation between the Nevanlinna-Pick interpolation problem and the robust stabilization is ...
    • A routing algorithm for low earth orbit satellite networks 

      Dinçerler, Cantekin (Bilkent University, 1995)
      In this study, we consider the geometric aspects of low earth orbit (LEO) satellite constellations and investigate the performance of a satellite network that uses our proposed routing algorithm. The optimum inclination ...
    • Routing, spectrum allocation and regenerator placement in flexible-grid optical networks 

      Kahya, Alper (Bilkent University, 2013)
      Tremendous increase in the number of wireless devices has been resulting in huge growth in the Internet traffic. This growth necessitates efficient usage of resources in the optical networks, which form the backbone of ...
    • S-band GaN based low noise MMIC amplifier design and characterization 

      Taşcı, Muhittin (Bilkent University, 2019-02)
      Low Noise Amplifiers (LNA) are widely preferred components in receiver frontend modules. The received signal level is generally very low and amplifying it without adding too much noise is very crucial in communication ...
    • S-band GaN high power amplifier design and implementation 

      Kavuştu, Muhammet (Bilkent University, 2019-02)
      High power RF Microwave amplifiers are becoming more important as the telecommunications, defense and aerospace industries' demands develop. GaN on SiC technology offers higher power and better form factors for these ...
    • Safety limits & rapid scanning methods in magnetic particle imaging 

      Demirel, Ömer Burak (Bilkent University, 2017-07)
      Magnetic Particle Imaging (MPI) is a new imaging modality that utilizes nonlinear magnetization of superparamagnetic tracers, with high sensitivity and zeroionizing radiation advantages. Since the introduction of MPI in ...
    • Safety of metallic implants in magnetic resonance imaging 

      Ferhanoğlu, Onur (Bilkent University, 2005)
      Magnetic Resonance Imaging (MRI) is safe only if we take safety precautions. In the presence of a metallic implant inside the body, three types of magnetic fields encountered in MRI (Static magnetic field, radiofrequency ...
    • Scattering and radiation problems of arbitrarily shaped conducting bodies above the ground plane 

      Yıldırım, Cemal C. (Bilkent University, 2002)
      A method of moment solution is applied for the scattering and radiation problems of arbitrarily shaped conducting bodies placed close to an infinite ground plane. An equivalent problem is produced by using image theory ...
    • Scattering from impedance objects at the edge of a perfectly conducting wedge 

      Ghassemiparvin, Behnam (Bilkent University, 2012)
      In this study, scattering from impedance bodies positioned at the edge of a perfectly conducting (PEC) wedge is investigated. In the treatment of the problem, eigenfunction expansion in terms of spherical vector wave ...
    • Secrecy rates of finite-input intersymbol interference channels 

      Hanoğlu, Serdar (Bilkent University, 2016-11)
      Due to the broadcast nature of the communication medium, security is a critical problem in wireless networks. Securing the transmission at the physical layer is a promising alternative or complement to the conventional ...
    • Secure multi-antenna transmission with finite-alphabet signaling 

      Aghdam, Sina Rezaei (Bilkent University, 2018-01)
      With the ever-growing demand for services that rely on transmission over wireless networks, a challenging issue is the security of the transmitted information. Due to its open nature, wireless communications is prone to ...
    • Semi-automatic video object segmentation 

      Esen, Ersin (Bilkent University, 2000)
      Content-based iunetionalities form the core of the future multimedia applications. The new multimedia standard MPEG-4 provides a new form of interactivity with coded audio-visual data. The emerging standard MPEG-7 specifies ...
    • Semiconductor quantum dots driven by radiative and nonradiative energy transfer for high-efficiency hybrid LEDs and photovoltaics 

      Güzeltürk, Burak (Bilkent University, 2011)
      Today the world energy demand has overtaken unprecedented consumption levels, which have never been reached before in the history of the world. The current trends indicate that the increasing demand for energy will tend ...