Cognitive-radio systems for spectrum, location, and environmental awareness
Author
Celebi, H.
Güvenç, I.
Gezici, Sinan
Arslan, H.
Date
2010Source Title
IEEE Antennas and Propagation Magazine
Print ISSN
1045-9243
Publisher
IEEE
Volume
52
Issue
4
Pages
41 - 61
Language
English
Type
ArticleItem Usage Stats
100
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views
154
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downloads
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