Now showing items 1-17 of 17

    • Adaptive filtering approaches for non-Gaussian stable processes 

      Arıkan, O.; Belge, M.; Çetin, A. E.; Erzin, E. (Institute of Electrical and Electronics Engineers, 1995)
      A large class of physical phenomenon observed in practice exhibit non-Gaussian behavior. In this paper, α-stable distributions, which have heavier tails than Gaussian distribution, are considered to model non-Gaussian ...
    • Adaptive filtering for non-gaussian stable processes 

      Arikan, O.; Cetin, A. E.; Erzin, E. (IEEE, 1994)
      A large class of physical phenomenon observed in practice exhibit non-Gaussian behavior. In this letter, a-stable distributions, which have heavier tails than Gaussian distribution, are considered to model non-Gaussian ...
    • AlGaN/GaN HEMT-based fully monolithic X-band low noise amplifier 

      Schwindt, R.; Kumar, V.; Aktas, O.; Lee, J. W.; Adesida, I. (Wiley, 2005-04)
      A fully monolithic AlGaN/GaN HEMT-based low noise amplifier is reported. The circuit demonstrated a noise figure of 3.5 dB, gain of -7.5 dB, input return loss of -7.5 dB, and output return loss of -15 dB at 8.5 GHz. The ...
    • Binary sequences with low aperiodic autocorrelation for synchronization purposes 

      Kocabaş, Ş. E.; Atalar, Abdullah (IEEE, 2003)
      An evolutionary algorithm is used to find three sets of binary sequences of length 49-100 suitable for the synchronization of digital communication systems. Optimization of the sets are done by taking into consideration ...
    • Filtering in fractional Fourier domains and their relation to chirp transforms 

      Özaktaş, H. M.; Barshan, B.; Onural, L.; Mendlovic, D. (IEEE, 1994)
      Fractional Fourier transforms, which are related to chirp and wavelet transforms, lead to the notion of fractional Fourier domains. The concept of filtering of signals in fractional domains is developed, revealing that ...
    • Improvement of face detection algorithms for news videos 

      Ikizler, N.; Duygulu P. (2005)
      People are the most important subjects in news videos and for proper retrieval of person images, face detection is a very crucial step. However, face detection and recognition in news videos is a very challenging task due ...
    • Line spectral frequency representation of subbands for speech recognition 

      Erzin, E.; Çetin, A.E. (1995)
      In this paper, a new set of speech feature parameters is constructed from subband analysis based Line Spectral Frequencies (LSFs). The speech signal is divided into several subbands and the resulting subsignals are represented ...
    • Location and curvature estimation of "spherical" targets using a flexible sonar configuration 

      Barshan, B. (IEEE, Piscataway, NJ, United States, 1996)
      A novel, flexible, three-dimensional (3-D) multi-sensor sonar system is employed to localize the center of a spherical target and estimate its radius of curvature. The interesting limiting cases for the problem under study ...
    • Map building with multiple range measurements using morphological surface profile extraction 

      Barshan, B.; Başkent, D. (IEEE, Piscataway, NJ, United States, 1999)
      A novel method is described for surface profile extraction based on morphological processing of multiple range sensor data. The approach taken is extremely flexible and robust, in addition to being simple and straightforward. ...
    • Morphological surface profile extraction from multiple sonars 

      Başkent, D.; Barshan, B. (IEEE, Piscataway, NJ, United States, 1998)
      This paper presents a novel method for surface profile determination using multiple sensors. Our approach is based on morphological processing techniques to fuse the range data from multiple sensor returns in a manner that ...
    • Moving object detection in video by detecting non-Gaussian regions in subbands and active contours 

      Yagmur Gok, M.; Enis Cetin, A. (2003)
      A multi-stage moving object detection algorithm in video is described in this paper. First, the camera motion is eliminated by motion compensation. An adaptive subband decomposition structure is then used to analyze the ...
    • Online exercise ECG signal orthogonalization 

      Acar, B.; Köymen H. (1996)
      In this paper an efficient method of making use of the redundancy in standard 12 lead ECG signals to eliminate noise is described. The method is based on orthogonalization via online Singular Value Decomposition (SVD). Its ...
    • Optimal filtering in fractional Fourier domains 

      Kutay, M.Alper, Ozaktas Haldun, M.; Onural Levent, Arikan Orhan (1995)
      The ordinary Fourier transform is suited best for analysis and processing of time-invariant signals and systems. When we are dealing with time-varying signals and systems, filtering in fractional Fourier domains might allow ...
    • Robust adaptive filtering algorithms for α-stable random processes 

      Aydin, G.; Arikan, O.; Çetin, A. E. (Institute of Electrical and Electronics Engineers, 1999-02)
      A new class of algorithms based on the fractional lower order statistics is proposed for finite-impulse response adaptive filtering in the presence of α-stable processes. It is shown that the normalized least mean p-norm ...
    • Robust least mean mixed norm adaptive filtering for α-stable random processes 

      Aydin, G.; Tanrikulu, O.; Cetin, A. E. (IEEE, Piscataway, NJ, United States, 1997)
      Based on the concept of Fractional Lower Order Statistics (FLOS), we present the Robust Least Mean Mixed Norm (RLMMN) adaptive algorithm for applications in impulsive environments modeled by α-stable distributions. A ...
    • Small moving object detection using adaptive subband decomposition in video sequences 

      Zaibi, R.; Cetin, E. A.; Yardimci, Y. C. (Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, United States, 2000)
      In this paper, a small moving object method detection method in video sequences is described. In the first step, the camera motion is eliminated using motion compensation. An adaptive subband decomposition structure is ...
    • A Wired-AND Current-Mode Logic Circuit Technique in CMOS for Low-Voltage, High-Speed and Mixed-Signal VLSIC 

      Ungan I.E.; Aşkar, M. (1997)
      A wired-AND current-mode logic (WCML) circuit technique in CMOS technology for low-voltage and high-speed VLSI circuits is proposed, and a WCML cell library is developed using standard 0.8 micron CMOS process. The proposed ...