Reference : Optimization of hard fusion based spectrum sensing for energy-constrained cognitive r...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/14528
Optimization of hard fusion based spectrum sensing for energy-constrained cognitive radio networks
English
Maleki, Sina mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Prabhakar Chepuri, Sundeep []
Leus, Geert []
Dec-2013
Physical Communication
Elsevier
9
193-198
Yes
International
1874-4907
1876-3219
Amsterdam
Netherlands
[en] Cognitive radio ; Cooperative spectrum sensing ; Energy-efficiency ; Hard decision fusion ; Scheduling ; k-out-of-N rule
[en] The detection reliability of a cognitive radio network improves by employing a cooperative spectrum sensing scheme. However, increasing the number of cognitive radios entails a growth in the cooperation overhead of the system. Such an overhead leads to a throughput degradation of the cognitive radio network. Since current cognitive radio networks consist of low-power radios, the energy consumption is another critical issue. In this paper, throughput optimization of the hard fusion based sensing using the k-out-of-N rule is considered. We maximize the throughput of the cognitive radio network subject to a constraint on the probability of detection and energy consumption per cognitive radio in order to derive the optimal number of users, the optimal k and the best probability of false alarm. The simulation results based on the IEEE 802.15.4/ZigBee standard, show that the majority rule is either optimal or almost optimal in terms of the network throughput.
http://hdl.handle.net/10993/14528
10.1016/j.phycom.2012.07.003
http://www.sciencedirect.com/science/article/pii/S1874490712000663

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