Message-Passing Algorithms for Coordinated Spectrum Sensing in Cognitive Radio Networks

This letter presents distributed algorithms that enable efficient spectrum sensing in cognitive radio networks. In the proposed setting, each node in the system detects different channels in a cooperative fashion in order to improve access to the spectral resources available to the cognitive radio network. The developed scheme utilizes a message-passing framework for efficient channel assignment. Simulation results establish that this class of algorithms outperform existing techniques and improves the overall sensing performance of the system.