Adaptive decode-and-forward protocol-based cooperative spectrum sensing in cognitive radio
by Chanchal Kumar De; Sumit Kundu
International Journal of Communication Networks and Distributed Systems (IJCNDS), Vol. 14, No. 2, 2015

Abstract: In this paper, a multiple-user cooperative spectrum sensing (MCSS) scheme based on a hybrid relay protocol is proposed to achieve the spatial diversity gains in detection of primary user in a cognitive radio (CR) networks. The proposed hybrid relay protocol (adaptive decode-and-forward protocol) works adaptively uses either AF or DF mode of relay operation. Closed-form expressions of detection probability (P_d) and false alarm probability (α) for the proposed adaptive decode-and-forward-based multiple-user cooperative spectrum scheme (ADF-MCSS) over Rayleigh fading sensing channels are derived. We extend the concept of two user amplify-and-forward (AF) and decode-and-forward (DF) cooperative spectrum sensing schemes in multi-users scenario (i.e., AF-MCSS and DF-MCSS) over Rayleigh fading channels. Closed-form expressions of AF-MCSS and DF-MCSS schemes over a Rayleigh fading channels are also evaluated and compared with that of proposed ADF-MCSS. Our analytical as well as simulation results demonstrate the impact of number of cooperative relays, SNR in sensing channel, false alarm on detection probability in proposed ADF and conventional AF or DF schemes.

Online publication date: Tue, 31-Mar-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Communication Networks and Distributed Systems (IJCNDS):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com