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IEICE TRANSACTIONS on Communications

A Robust Secure Cooperative Spectrum Sensing Scheme Based on Evidence Theory and Robust Statistics in Cognitive Radio

Nhan NGUYEN-THANH, Insoo KOO

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Summary :

Spectrum sensing is a key technology within Cognitive Radio (CR) systems. Cooperative spectrum sensing using a distributed model provides improved detection for the primary user, which opens the CR system to a new security threat. This threat is the decrease of the cooperative sensing performance due to the spectrum sensing data falsification which is generated from malicious users. Our proposed scheme, based on robust statistics, utilizes only available past sensing nodes' received power data for estimating the distribution parameters of the primary signal presence and absence hypotheses. These estimated parameters are used to perform the Dempster-Shafer theory of evidence data fusion which causes the elimination of malicious users. Furthermore, in order to enhance performance, a node's reliability weight is supplemented along with the data fusion scheme. Simulation results indicate that our proposed scheme can provide a powerful capability in eliminating malicious users as well as a high gain of data fusion under various cases of channel condition.

Publication
IEICE TRANSACTIONS on Communications Vol.E92-B No.12 pp.3644-3652
Publication Date
2009/12/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E92.B.3644
Type of Manuscript
Special Section PAPER (Special Section on Dynamic Spectrum Access)
Category
Spectrum Sensing

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