Now showing items 1-11 of 11

    • Blind phase noise estimation in OFDM systems by sequential Monte Carlo method 

      Panayirci, E.; Çirpan H.A.; Moeneclaey, M.; Noels, N. (2006)
      In this paper, based on a sequential Monte Carlo method, a computationally efficient algorithm is presented for estimating the residual phase noise, blindly, generated at the output the phase tracking loop employed in OFDM ...
    • Camera tamper detection using wavelet analysis for video surveillance 

      Aksay, A.; Temizel, A.; Çetin, A. E. (2007)
      It is generally accepted that video surveillance system operators lose their concentration after a short period of time and may miss important events taking place. In addition, many surveillance systems are frequently left ...
    • Co-Difference Based Object Tracking Algorithm for Infrared Videos 

      Demir, H. S.; Cetin, A. E. (IEEE Computer Society, 2016)
      This paper presents a novel infrared (IR) object tracking algorithm based on the co-difference matrix. Extraction of co-difference features is similar to the well known covariance method except that the vector product ...
    • A computational homogenization framework for soft elastohydrodynamic lubrication 

      Budt, M.; Temizer, I.; Wriggers, P. (Springer-Verlag, 2012)
      The interaction between microscopically rough surfaces and hydrodynamic thin film lubrication is investigated under the assumption of finite deformations. Within a coupled micro-macro analysis setting, the influence of ...
    • Covariance matrix-based fire and flame detection method in video 

      Habiboğlu, Y. H.; Günay, O.; Çetin, A. E. (Springer, 2011-09-17)
      This paper proposes a video-based fire detection system which uses color, spatial and temporal information. The system divides the video into spatio-temporal blocks and uses covariance-based features extracted from these ...
    • Design and analysis of a modular learning based cross-coupled control algorithm for multi-axis precision positioning systems 

      Ulu, N. G.; Ulu E.; Cakmakci, M. (Institute of Control, Robotics and Systems, 2016)
      Increasing demand for micro/nano-technology related equipment resulted in growing interest for precision positioning systems. In this paper a modular controller combining cross-coupled control and iterative learning control ...
    • An empirical eigenvalue-threshold test for sparsity level estimation from compressed measurements 

      Lavrenko, A.; Romer F.; Del Galdo G.; Thoma, R.; Arikan, O. (European Signal Processing Conference, EUSIPCO, 2014)
      Compressed sensing allows for a significant reduction of the number of measurements when the signal of interest is of a sparse nature. Most computationally efficient algorithms for signal recovery rely on some knowledge ...
    • Learning based cross-coupled control for multi-axis high precision positioning systems 

      Geçer-Ulu, Nurcan; Ulu, Erva; Çakmakçı, Melih (ASME, 2012-10)
      In this paper, a controller featuring cross-coupled control and iterative learning control schemes is designed and implemented on a modular two-axis positioning system in order to improve both contour and tracking accuracy. ...
    • Moving region detection in compressed video 

      Töreyin, B. U.; Cetin, A. E.; Aksay, A.; Akhan, M. B. (Springer, 2004)
      In this paper, an algorithm for moving region detection in compressed video is developed. It is assumed that the video can be compressed either using the Discrete Cosine Transform (DOT) or the Wavelet Transform (WT). The ...
    • A multiplication-free framework for signal processing and applications in biomedical image analysis 

      Suhre, A.; Keskin F.; Ersahin, T.; Cetin-Atalay, R.; Ansari, R.; Cetin, A.E. (2013)
      A new framework for signal processing is introduced based on a novel vector product definition that permits a multiplier-free implementation. First a new product of two real numbers is defined as the sum of their absolute ...
    • Rayleigh-bloch waves in CMUT arrays 

      Atalar, Abdullah; Köymen, H.; Oğuz, H. K. (Institute of Electrical and Electronics Engineers Inc., 2014)
      Using the small-signal electrical equivalent circuit of a capacitive micromachined ultrasonic transducer (CMUT) cell, along with the self and mutual radiation impedances of such cells, we present a computationally efficient ...