Abstract—The most important challenge in cognitive radio networks is detection of primary user signal. Cooperation among secondary users increases the performance of the system significantly. In cooperative sensing in hostile environments, intruder nodes send false sensing results to the fusion center and make the fusion center erroneously decides about the presence of the primary user. Several detection methods have been proposed to nullify effects of malicious nodes. But in most of these scenarios, the fading effects are not considered. In this paper, we propose a method to identify trustworthy nodes in hostile environments, considering fading effects. We introduce a modified filtering method to reduce the effects of malicious nodes. We also propose new trust factors to be assigned to the nodes for increasing the effects of trustworthy nodes in the final decision.
Index Terms—Cognitive radio, cooperative spectrum sensing, energy detector, trustworthy nodes detection.
The authors are with the the School of electrical engineering Iran University of science and technology, Tehran 16846, Iran (e-mail: emtaghavi@Elec.iust.ac.ir, abolhassanii@iust.ac.ir).
Cite: Ehsan Moeen Taghavi and Bahman Abolhassani, "Trustworthy Node Detection in Cognitive Radio in Hostile Environments," International Journal of Information and Electronics Engineering vol. 3, no. 2, pp. 132-135, 2013.