NDLI: Adaptive Decision Fusion based cooperative spectrum sensing for Cognitive Radio systems

Content Provider	IEEE Xplore Digital Library
Author	Ugur Toreyin, B. Yarkan, S. Qaraqe, K.A. Enis Cetin, A.
Copyright Year	2011
Description	Author affiliation: Bilkent Üniversitesi, Turkey (Enis Cetin, A.) \|\| Teksas A ve M Üniversitesi, USA (Ugur Toreyin, B.; Yarkan, S.; Qaraqe, K.A.)
Abstract	In this paper, an online Adaptive Decision Fusion (ADF) framework is proposed for the central spectrum awareness engine of a spectrum sensor network in Cognitive Radio (CR) systems. Online learning approaches are powerful tools for problems where drifts in concepts take place. Cooperative spectrum sensing in cognitive radio networks is such a problem where channel characteristics and utilization patterns change frequently. The importance of this problem stems from the requirement that secondary users must adjust their frequency utilization strategies in such a way that the communication performance of the primary users would not be degraded by any means. In the proposed framework, sensing values from several sensor nodes are fused together by weighted linear combination at the central spectrum awareness engine. The weights are updated on-line according to an active fusion method based on performing orthogonal projections onto convex sets describing power reading values from each sensor. The proposed adaptive fusion strategy for cooperative spectrum sensing can operate independent from the channel type between the primary user and secondary users. Results of simulations and experiments for the proposed method conducted in laboratory are also presented.
Starting Page	1173
Ending Page	1176
File Size	482398
Page Count	4
File Format	PDF
ISBN	9781457704628
e-ISBN	9781457704635
e-ISBN	9781457704611
DOI	10.1109/SIU.2011.5929865
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-20
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptive systems Conferences Signal processing Sensors Cognitive radio MATLAB Engines
Content Type	Text
Resource Type	Article

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