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      Time delay estimation in cognitive radio systems

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      Author
      Koçak, Fatih
      Çelebi, H.
      Gezici, Sinan
      Qaraqe, K. A.
      Arslan, H.
      Poor, H. V.
      Date
      2009-12
      Source Title
      3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2009
      Publisher
      IEEE
      Pages
      400 - 403
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      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, theoretical limits on time delay estimation are reviewed. Then, two-step time delay estimators that provide trade-offs between computational complexity and performance are investigated. In addition, asymptotic optimality properties of the two-step time delay estimators are discussed. Finally, simulation results are presented to explain the theoretical results. © 2009 IEEE.
      Keywords
      Cognitive radio
      Cramer-Rao lower bound
      Diversity
      Maximum-likelihood
      Time delay estimation
      Asymptotic optimality
      Cognitive radio
      Cramer Rao lower bound
      ON time
      Simulation result
      Step time
      Theoretical limits
      Theoretical result
      Time delay estimation
      Cognitive systems
      Computational complexity
      Cramer-Rao bounds
      Estimation
      Maximum likelihood estimation
      Radio
      Radio systems
      Sensors
      Technical presentations
      Time delay
      Permalink
      http://hdl.handle.net/11693/28636
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/CAMSAP.2009.5413247
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      • Department of Electrical and Electronics Engineering 3524
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