Location-aware cognitive sensing for maximizing network capacity

Authors:
Peng Jia;Mai Vu;Tho Le-Ngoc
Affiliations:
Department of Electrical and Computer Engineering, McGill University, Montreal, QC;Department of Electrical and Computer Engineering, McGill University, Montreal, QC;Department of Electrical and Computer Engineering, McGill University, Montreal, QC
Venue:
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Year:
2009

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Abstract

We develop a closed-form optimal spectrum sensing threshold to maximize a cognitive network weighted sum capacity. In an one primary user and one cognitive user network, spatial location side information is used by the cognitive transmitter to adjust its sensing threshold accordingly. Numerical results show that, compared to another threshold based on minimizing a Bayesian risk function, the proposed threshold improves the network sum capacity significantly. The benefit of spatial location side information is also revealed in the sum capacity.