Cooperative sensing with transmit diversity based on randomised STBC in CR networks Online publication date: Sat, 13-Sep-2014
by Telex Magloire Nkouatchah Ngatched; Attahiru Sule Alfa; Jun Cai
International Journal of Autonomous and Adaptive Communications Systems (IJAACS), Vol. 6, No. 4, 2013
Abstract: In this paper, a cognitive radio (CR) network composed of K secondary users (SUs) who cooperatively sense a channel using the k-out-of-K fusion rule to determine the presence of the primary user is studied. The sensing-throughput tradeoff problem is investigated in a realistic environment where both the sensing channels and reporting channels are characterised by fading channels. It is observed that taking into consideration the probability of reporting error in the CR network increases the sensing time and reduces the maximum average throughput of the SUs. To mitigate the effect of the probability of reporting error, a transmit diversity-based cooperative spectrum sensing method using randomised space-time block coding (RSTBC) is proposed. Simulations results show that the spatial diversity gain induced by RSTBC significantly decreases the sensing time and improves the throughput of the SUs.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
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 Autonomous and Adaptive Communications Systems (IJAACS):
Login with your Inderscience username and 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
Our Blog 
Follow us on Twitter 
Visit us on Facebook