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An Intelligent Fuzzy Based Energy Detection Approach for Cooperative Spectrum Sensing

Publication Type : Journal Article

Publisher : Circuits and Systems

Source : Circuits and Systems, 7, 1042-1050.

Url :

Keywords : Cognitive Radio (CR), Spectrum Sensing, Fuzzy System, Dynamic Spectrum Access, Energy Detection Scheme

Campus : Chennai

School : School of Engineering

Center : Amrita Innovation & Research

Department : Electronics and Communication

Verified : Yes

Year : 2016

Abstract : Cognitive radio systems are helpful to access the unused spectrum using the popular technique, referred to as spectrum sensing. Spectrum sensing involves the detection of primary user (PU) signal using dynamic spectrum access. Cooperative spectrum sensing takes advantage of the spatial diversity in multiple cognitive radio user networks to improve the sensing accuracy. Though the cooperative spectrum sensing schemes significantly improve the sensing accuracy, it requires the noise variance and channel state information which may lead to transmission overhead. To overcome the drawbacks in conventional cooperative spectrum sensing, this paper proposes a fuzzy system based cooperative spectrum sensing. Selection combining (SC) and maximum ratio combining (MRC) are used at fuzzy based fusion center to obtain the value of the sensing energy. These energy values are utilized in finding the presence of PU, results in improved sensing accuracy. In addition, an intelligent fuzzy fusion algorithm determines the PU presence without the channel state information based on multiple threshold values. Simulation results show that the proposed scheme outperforms the existing schemes in terms of sensing accuracy.

Cite this Research Publication : SitadeviBharatula&MeenakshiMurugappan, “An Intelligent Fuzzy Based Energy Detection Approach for Cooperative Spectrum Sensing”, 2016, Circuits and Systems, 7, 1042-1050

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