Efficient cooperative spectrum sensing in cognitive radio

Authors:
Dan Wang;Ahmed H. Tewfik
Affiliations:
Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN;Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 3
Cited 0

Spectrum sensing in cognitive radio networks: the cooperation-processing tradeoff

Wireless Communications & Mobile Computing - Cognitive Radio, Software Defined Radio And Adaptive Wireless Systems
Cooperative Spectrum Sensing in Cognitive Radio, Part I: Two User Networks

IEEE Transactions on Wireless Communications
Cooperative Spectrum Sensing in Cognitive Radio, Part II: Multiuser Networks

IEEE Transactions on Wireless Communications

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Abstract

This paper presents a new cooperative spectrum sensing scheme, which allocates two separate short periods for sensing and cooperation to achieve high capability of detecting the Primary User (PU) with low interference. A mathematical model is built to derive a closed formulation of the detection probability of the CR users for guiding a real system design. Extensive simulations results demonstrate that the proposed method is superior to non-cooperative sensing and relay-based method [3] in terms of high sensing agility and less interference to the PU. Especially, comparing with [3], the proposed design increases the detection speed by 48% and reduces the interference to PU by 43%. This new sensing protocol owns the features of low complexity and independence of special hardware support, making it easy and flexible for real system implementation.