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Cognitive-Radio Systems for Spectrum, Location, and Environmental Awareness

Author(s): Celebi, H (Celebi, Hasari); Guvenc, I (Guevenc, Ismail); Gezici, S (Gezici, Sinan); Arslan, H (Arslan, Hueseyin) Source: IEEE ANTENNAS AND PROPAGATION MAGAZINE, 52 (4): 41-61 AUG 2010

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.

Author(s):  Celebi, H (Celebi, Hasari); Guvenc, I (Guevenc, Ismail); Gezici, S (Gezici, Sinan); Arslan, H (Arslan, Hueseyin) 
Source:  IEEE ANTENNAS AND PROPAGATION MAGAZINE, 52 (4): 41-61 AUG 2010 
Language:  English 
Document Type:  Article 
Author Keywords: Cognitive radio; cognitive positioning system (CPS); cognitive radar; Cramer-Rao lower bound (CRLB); environment mapping; communication channels; propagation channel; spectrum sensing; seamless positioning
KeyWords Plus:  TIME-DELAY ESTIMATION; WIRELESS NETWORKS; TOA ESTIMATION; LOCALIZATION; ADAPTATION; LIMITS; GEOLOCATION; CHANNELS; DESIGN; ACCESS 
Addresses:  [Celebi, Hasari] Texas A&M Univ Qatar, Dept Elect & Comp Engn, Doha, Qatar; [Guevenc, Ismail] DOCOMO USA Labs, Wireless Access Lab, Palo Alto, CA 94304 USA; [Gezici, Sinan] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey; [Arslan, Hueseyin] Univ S Florida, Dept Elect Engn, Tampa, FL 33620 USA 
Reprint Address:  Celebi, H, Texas A&M Univ Qatar, Dept Elect & Comp Engn, POB 23874,Texas & M Engn Bldg Educ City, Doha, Qatar. 
Funding Agency:  This work was supported in part by Qatar National Research Fund (QNRF) and Qatar Telecom (QteJ). S. Gezici wishes to acknowledge the activity of the Network of Excellence in Wireless COMmunications NEWCOM++ of the European Commission (contract n. 216715) that motivated this work. 
Publisher:  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC 
Publisher Address:  445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA 
ISSN:  1045-9243 
29-char Source Abbrev.:  IEEE ANTENNAS PROPAG MAG 
ISO Source Abbrev.:  IEEE Antennas Propag. Mag. 
Subject Category:  Engineering, Electrical & Electronic 
ISI Document Delivery No.:  683JW 
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