Spectrum sensing in cognitive radio networks: the cooperation-processing tradeoff
Wireless Communications & Mobile Computing - Cognitive Radio, Software Defined Radio And Adaptive Wireless Systems
On the efficiency of distributed spectrum sensing in ad-hoc cognitive radio networks
Proceedings of the 2009 ACM workshop on Cognitive radio networks
Maximum channel throughput via cooperative spectrum sensing in cognitive radio networks
IEEE Transactions on Wireless Communications
Spectrum Sensing Framework for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
ISRN Communications and Networking
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Cognitive radio operation with opportunistic spectrum access has been proposed to utilize spectrum holes left unused by a primary system owning the spectrum license. The key of cognitive radio operation is the ability to detect weak primary signals and to control the transmission of cognitive users in a way that interference between the two systems is minimized. In this paper we evaluate how a sensor network deployed to provide distributed spectrum sensing can assist cognitive operation. Specifically, we consider sensor networks with regular topology, where a high level of cooperation also means that sensors far from the source of the primary signal are involved in the sensing process. Assuming energy detection and hard-decision combining we derive worst case probabilities of missed detection and false alarm, determine the necessary level of cooperation among the sensors and evaluate how the sensor density and the sensing time affect the performance of distributed sensing.