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      Optimal detector randomization in cognitive radio systems in the presence of imperfect sensing decisions

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      Author(s)
      Sezer, A. D.
      Gezici, Sinan
      Gursoy, M. C.
      Date
      2014
      Source Title
      IEEE Communications Letters
      Print ISSN
      1089-7798
      Volume
      18
      Issue
      2
      Pages
      213 - 216
      Language
      English
      Type
      Article
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      Abstract
      In this study, optimal detector randomization is developed for secondary users in a cognitive radio system in the presence of imperfect spectrum sensing decisions. It is shown that the minimum average probability of error can be achieved by employing no more than four maximum a-posteriori probability (MAP) detectors at the secondary receiver. Optimal MAP detectors and generic expressions for their average probability of error are derived in the presence of possible sensing errors. Also, sufficient conditions are presented related to improvements due to optimal detector randomization.
      Keywords
      Cognitive radio
      Detector randomization
      Probability of error
      Spectrum sensing
      Average probability of error
      Detector randomizations
      Generic expression
      Imperfect spectrum sensing
      Maximum a posteriori probability
      Optimal detectors
      Probability of errors
      Spectrum sensing
      Cognitive radio
      Optimization
      Radio systems
      Random processes
      Detectors
      Permalink
      http://hdl.handle.net/11693/26345
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/LCOMM.2013.120713.132423
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      • Department of Electrical and Electronics Engineering 3863
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