Now showing items 1-12 of 12

    • Adaptive decision fusion based cooperative spectrum sensing for cognitive radio systems 

      Töreyin, B. U.; Yarkan, S.; Qaraqe, K. A.; Çetin, Ahmet Enis (IEEE, 2011)
      In this paper, an online Adaptive Decision Fusion (ADF) framework is proposed for the central spectrum awareness engine of a spectrum sensor network in Cognitive Radio (CR) systems. Online learning approaches are powerful ...
    • Adaptive ensemble learning with confidence bounds for personalized diagnosis 

      Tekin, Cem; Yoon, J.; Van Der Schaar, M. (AAAI Press, 2016)
      With the advances in the field of medical informatics, automated clinical decision support systems are becoming the de facto standard in personalized diagnosis. In order to establish high accuracy and confidence in ...
    • The aid of colour on spatial navigation: A study in a virtual hospital environment 

      Kumaoğlu, Özge; Olguntürk, Nilgün (ACM, 2016)
      The aim of this study is to explore the effects of colour as visuo-spatial cue on spatial navigation and developing a cognitive map in elderly in a simulated virtual hospital environment. The study further purports to ...
    • An experimental setup for performance analysis of an online adaptive cooperative spectrum sensing scheme for both in-phase and quadrature branches 

      Yarkan, S.; Qaraqe, K.A.; Töreyin, B.U.; Çetin, A. Enis (IEEE, 2011)
      Spectrum sensing is one of the most essential characteristics of cognitive radios (CRs). Robustness and adaptation to varying wireless propagation scenarios without compromising the sensing accuracy are desirable features ...
    • An experimental validation of an online adaptive cooperation scheme for spectrum sensing 

      Yarkan, S.; Töreyin, B. U.; Qaraqe, K. A.; Çetin, A. Enis (IEEE, 2011-05)
      Cooperative spectrum sensing methods in the literature assume a static communication scenario with fixed channel and propagation environment characteristics. In order to maintain the level of sensing reliability and ...
    • Graph analytics accelerators for cognitive systems 

      Ozdal, M. M.; Yesil, S.; Kim, T.; Ayupov, A.; Greth, J.; Burns, S.; Ozturk, O. (Institute of Electrical and Electronics Engineers, 2017)
      Hardware accelerators are known to be performance and power efficient. This article focuses on accelerator design for graph analytics applications, which are commonly used kernels for cognitive systems. The authors propose ...
    • Information arts and information science: time to unite? 

      Karamuftuoglu, M. (Wiley, 2006)
      This article explicates the common ground between two currently independent fields of Inquiry, namely information arts and information science, and suggests a frame-work that could unite them as a single field of study. ...
    • An insight on designers’ sketching activities in traditional versus digital media 

      Bilda, Z.; Demirkan, H. (Pergamon Press, 2003-01)
      This study aims at gaining an insight on designers' cognitive processes while sketching in digital vs traditional media. Empirical data on design processes have been obtained from protocol analyses of six interior designers ...
    • Performance limits on ranging with cognitive radio 

      Dardari, D.; Karisan, Yasir; Gezici, Sinan; D'Amico, A. A.; Mengali, U. (IEEE, 2009-06)
      Cognitive radio is a promising paradigm for efficient utilization of the radio spectrum due to its capability to sense environmental conditions and adapt its communication and localization features. In this paper, the ...
    • Theoretical limits on time delay estimation for ultra-wideband cognitive radios 

      Gezici, Sinan; Celebi, H.; Arslan, H.; Poor, H. V. (IEEE, 2008-09)
      In this paper, theoretical limits on time delay estimation are studied for ultra-wideband (UWB) cognitive radio systems. For a generic UWB spectrum with dispersed bands, the Cramer-Rao lower bound (CRLB) is derived for ...
    • Time delay estimation in cognitive radio systems 

      Koçak, Fatih; Çelebi, H.; Gezici, Sinan; Qaraqe, K. A.; Arslan, H.; Poor, H. V. (IEEE, 2009-12)
      In cognitive radio systems, secondary users can utilize multiple dispersed bands that are not used by primary users. In this paper, time delay estimation of signals that occupy multiple dispersed bands is studied. First, ...
    • Time-delay estimation in dispersed spectrum cognitive radio systems 

      Kocak, F.; Celebi, H.; Gezici, S.; Qaraqe, K. A.; Arslan, H.; Poor, H. V. (SpringerOpen, 2010)
      Time-delay estimation is studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. A two-step approach is proposed to obtain accurate time-delay estimates of signals that occupy multiple ...