Now showing items 1-10 of 10

    • 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 ...
    • 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 ...
    • Konyalı halk sanatçısı: Kör Ahmet 

      İntişah, Osman Burak; Gürbüz, Ahmet Serdar; Büyükgebiz, Büşra; Oral, Pelin; Özdoğan, Yaren Şevval (Bilkent University, 2018)
      Ahmet özdemir yeterli profesyonel eğitim almamasına ve görme engeline rağmen birden fazla enstrümanı başarıyla çalan ve repertuarında yüzlerce türkü barındıran bir halk sanatçısıydı. Müzik kariyerinin yanı sıra mizahi sahne ...
    • 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 ...
    • Short-range wireless communications and reliability 

      Güvenç, İ.; Gezici, Sinan; Şahinoğlu, Z.; Kozat, U. C. (Cambridge University Press, 2011)
      Even though there is no universally accepted definition, short-range wireless communications typically refers to a wide variety of technologies with communication ranges from a few centimeters to several hundreds of meters. ...
    • 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 ...
    • Türk Sanat Müziği'nin son elli yıldaki değişimi 

      Bora, Gonca; Sümeyra Nur Doğan; Hasan Murtaza Kolomuç; Bafalı, Merve; Elmalı, Ekin (Bilkent University, 2019)
      Bu çalışmada, Türk Sanat Müziği’nin 1970’li yıllardan itibaren geçirdiği değişim ve bu değişimin sebepleri; eğitim, beste, sosyal, siyasi, tüketim ve medya boyutları açısından incelenmiştir. Osmanlı Devleti zamanında yapılan ...