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Energy-efficient node selection for cooperative spectrum sensing with spatial correlation

: Mohammadi, J.; Penna, F.; Stanczak, S.; Kasparick, M.


Matthews, M.B. ; Naval Postgraduate School -NPS-, Monterey/Calif.; IEEE Signal Processing Society:
Asilomar Conference on Signals, Systems and Computers 2013. Vol.2 : Pacific Grove, California, USA, 3 - 6 November 2013
Piscataway, NJ: IEEE, 2013
ISBN: 978-1-4799-2391-5
ISBN: 978-1-4799-2390-8
ISBN: 978-1-4799-2388-5 (Print)
Asilomar Conference on Signals, Systems and Computers <47, 2013, Pacific Grove/Calif.>
Fraunhofer HHI ()

In this paper we investigate the node placement for a wireless sensor network deployed to sense the spectrum with spatial channel correlation. The goal is to find the best node constellation, such that the given power constraints are satisfied and the best sensing performance is acquired. We derive the analytical expression for probability of detection (PD) of the optimal test statistic as the measure of performance. Then we develop two heuristic methods to solve the non-convex optimization problem. Using numerical simulations the analytical expressions for PD is justified, as well as, the performance of the two proposed suboptimal approaches.