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General Information
    • ISSN: 1793-8244
    • Frequency: Semiyearly
    • DOI: 10.18178/JACN
    • Editor-in-Chief: Dr. Ka Wai Gary Wong
    • Executive Editor: Ms. Nina Lee
    • Abstracting/ Indexing: EI (INSPEC, IET), Engineering & Technology Digital Library, DOAJ, Electronic Journals Library, Ulrich's Periodicals Directory, International Computer Science Digital Library (ICSDL), ProQuest, and Google Scholar.
    • E-mail: jacn@ejournal.net
Editor-in-chief
Dr. Ka Wai Gary Wong
Division of Information and Technology Studies, Faculty of Education, The University of Hong Kong.
It's a honor to serve as the editor-in-chief of JACN. I'll work together with the editors and reviewers to help the journal progress
JACN 2015 Vol.3(3): 207-212 ISSN: 1793-8244
DOI: 10.7763/JACN.2015.V3.168

Optimal Hard Decision Fusion Rule for Centralized and Decentralized Cooperative Spectrum Sensing in Cognitive Radio Networks

Ashish Rauniyar, Jae Min Jang, and Soo Young Shin
Abstract—Cognitive radio (CR) is the key technology for unlicensed secondary users (SUs) to exploit the unused spectrum of primary users (PUs) via opportunistic spectrum access. In CR networks, SUs can be coordinated to perform cooperative spectrum sensing (CSS) to achieve higher detection accuracy. The fusion center in centralized CSS collects all the individual local spectrum sensing information from the respective SUs and combines the local spectrum sensing result by applying appropriate fusion rule to give a final collaborative decision whether to proceed with spectrum access or not. Basically, there exist two kinds of detection errors (i.e., miss-detection error and false-alarm error) in spectrum sensing, which degrade the sensing performance severely. Aiming to minimize the probability of total detection errors, we first dissect different hard decision fusion rule and we establish that “Half-Voting (HV)” rule is the optimal fusion rule applied to the detector for centralized CSS. Next, the performance of different hard decision fusion rule in AWGN channel and Rayleigh fading channel is carried out in MATLAB to find out the optimal hard decision fusion rule in centralized and decentralized CSS.

Index Terms—Cognitive radio, centralized, decentralized, hard decision fusion, optimization, Rayleigh fading.

Ashish Rauniyar and Jae Min Jang are with the Department of IT Convergence Engineering, Kumoh National Institute of Technology, South Korea (e-mail: ashish.rauniyar@kumoh.ac.kr, oops_kichin@naver.com).
Soo Young Shin is with the School of Electronics Engineering, Kumoh National Institute of Technology, South Korea (e-mail: wdragon@kumoh.ac.kr).

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Cite:Ashish Rauniyar, Jae Min Jang, and Soo Young Shin, "Optimal Hard Decision Fusion Rule for Centralized and Decentralized Cooperative Spectrum Sensing in Cognitive Radio Networks," Journal of Advances in Computer Networks vol. 3, no. 3, pp. 207-212, 2015.

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