Now showing items 1-10 of 10

    • Comparative theoretical analysis of distance estimation in visible light positioning systems 

      Keskin, M. F.; Gezici, S. (Institute of Electrical and Electronics Engineers Inc., 2016)
      In this paper, theoretical limits and estimators are studied for synchronous and asynchronous visible light positioning (VLP) systems. Specifically, the Cramér-Rao lower bounds (CRLBs) and maximum likelihood estimators are ...
    • Direct and two-step positioning in visible light systems 

      Keskin, M. F.; Gezici, S.; Arikan, O. (Institute of Electrical and Electronics Engineers, 2018)
      Visible light positioning (VLP) systems based on light emitting diodes can facilitate high accuracy localization services for indoor scenarios. In this paper, direct and two-step positioning approaches are investigated for ...
    • Direct positioning in synchronous and asynchronous visible light systems 

      Keskin, M. F.; Gezici, S.; Arikan, O. (Institute of Electrical and Electronics Engineers, 2018)
      In this paper, direct positioning approaches are investigated for both synchronous and asynchronous visible light systems. First, the maximum likelihood estimator (MLE) and the Cramér-Rao lower bound (CRLB) are derived for ...
    • Enhancements to threshold based range estimation for ultra-wideband systems 

      Soganci H.; Gezici, S.; Guldogan, M.B. (IEEE Computer Society, 2014)
      Ultra-wideband (UWB) signals have very high time resolution, which makes them a very good candidate for range estimation based wireless positioning. Although the accuracy is the major concern for range estimation, it is ...
    • Fundamental limits on localization in single input multiple output visible light systems 

      Kökdoğan, Furkan (Bilkent University, 2017-09)
      Visible light systems have recently been considered as an e ective and promising solution for indoor positioning. In this thesis, a theoretical accuracy analysis is conducted for position estimation in visible light ...
    • Jamming of Wireless Localization Systems 

      Gezici, S.; Gholami, M. R.; Bayram, S.; Jansson M. (Institute of Electrical and Electronics Engineers Inc., 2016)
      In this paper, the optimal jamming of wireless localization systems is investigated. Two optimal power allocation schemes are proposed for jammer nodes in the presence of total and peak power constraints. In the first ...
    • Optimal jammer placement in wireless localization networks 

      Gezici, S.; Bayram, S.; Gholami, M. R.; Jansson, M. (Institute of Electrical and Electronics Engineers Inc., 2015)
      The optimal jammer placement problem is proposed for a wireless localization network, where the aim is to degrade the accuracy of locating target nodes as much as possible. In particular, the optimal location of a jammer ...
    • Optimal jamming of wireless localization systems 

      Gezici, S.; Gholami, M.R.; Bayram, S.; Jansson, M. (Institute of Electrical and Electronics Engineers Inc., 2015)
      In this study, optimal jamming of wireless localization systems is investigated. Two optimal power allocation schemes are proposed for jammer nodes in the presence of total and peak power constraints. In the first scheme, ...
    • Optimal power allocation for jammer nodes in wireless localization systems 

      Bayram, S.; Keskin, M. F.; Gezici, S.; Arikan, O. (Institute of Electrical and Electronics Engineers Inc., 2017)
      In this paper, optimal power allocation strategies are investigated for jammer nodes in a wireless localization system. Building upon the concept of the restricted Bayesian approach, a generalized optimization strategy, ...
    • Theoretical limits on localization in single input multiple output (SIMO) visible light systems 

      Kokdogan, F.; Erdem, O.; Gezici, S. (Elsevier, 2018)
      In this work, a theoretical accuracy analysis is conducted for position estimation in visible light systems based on received signal strength (RSS) measurements. Considering a single light emitting diode (LED) at the ...