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2009
ACM

Optimal cooperative spectrum sensing in cognitive sensor networks

9 years 6 months ago
Optimal cooperative spectrum sensing in cognitive sensor networks
This paper addresses the problem of optimal cooperative spectrum sensing in a cognitive-enabled sensor network where cognitive sensors can cooperate in the sensing of the spectrum. Such sensor networks are assumed to be power resource constrained. With a given threshold for the accuracy of the spectrum detection, we find the optimal number of cognitive sensors participating in the cooperative spectrum sensing and the optimal sensing interval that minimize the total energy consumption of the cooperative sensing. First, the mathematical lower bound and upper bound for the number of cooperative cognitive sensors are found. Then the optimization problem to minimize the total energy consumed by a group of sensors is presented. Finally, an efficient approximate solution to the optimization problem is proposed. Numerical calculations validate the accuracy and the performance of the proposed scheme. The impact of the noise uncertainty, the choice of the energy detection threshold, and the sp...
Hai Ngoc Pham, Yan Zhang, Paal E. Engelstad, Tor S
Added 28 May 2010
Updated 28 May 2010
Type Conference
Year 2009
Where IWCMC
Authors Hai Ngoc Pham, Yan Zhang, Paal E. Engelstad, Tor Skeie, Frank Eliassen
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