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      Cognitive-radio systems for spectrum, location, and environmental awareness

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      Author
      Celebi, H.
      Güvenç, I.
      Gezici, Sinan
      Arslan, H.
      Date
      2010
      Source Title
      IEEE Antennas and Propagation Magazine
      Print ISSN
      1045-9243
      Publisher
      IEEE
      Volume
      52
      Issue
      4
      Pages
      41 - 61
      Language
      English
      Type
      Article
      Item Usage Stats
      100
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      154
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      Abstract
      In order to perform reliable communications, a system needs to have sufficient information about its operational environment, such as spectral resources and propagation characteristics. Cognitive-radio technology has capabilities for acquiring accurate spectrum, location, and environmental information, due to its unique features such as spectrum, location, and environmental awareness. The goal of this paper is to give a comprehensive review of the implementation of these concepts. In addition, the dynamic nature of cognitive-radio systems - including dynamic spectrum utilization, transmission, the propagation channel, and reception - is discussed, along with performance limits, challenges, mitigation techniques, and open issues. The capabilities of cognitive-radio systems for accurate characterization of operational environments are emphasized. These are crucial for efficient communications, localization, and radar systems.
      Keywords
      Cognitive positioning system (CPS)
      Cognitive radar
      Cognitive radio
      Communication channels
      Cramer-Rao lower bound (CRLB)
      Environment mapping
      Propagation channel
      Seamless positioning
      Spectrum sensing
      Permalink
      http://hdl.handle.net/11693/28567
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/MAP.2010.5638235
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      • Department of Electrical and Electronics Engineering 3524
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