This collection describes the architecture of cognitive radio networks, models for managing the wireless networks, security challenges and the efficient use of the spectrum. The opening chapter discusses the four layers of the TCP-IP protocol layer stock in the context of cognitive radio networks. Other topics of the 15 papers include dynamic spectrum access, perturbation analysis for spectrum sharing, optimal RF beamforming for MIMO cognitive networks, computation of performance parameters, and emergency cognitive radio ad hoc networks.
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