cognitive radio network

cognitiveradionetworkWiththerapidlyincreasingdemandsonwirelessbandwidth,thescarcityofspectralresourcebecomesmoreserious.Motivatedbyspectrumscarcityandspectrumunder-utilization,cognitiveradio,regardedasapotentialtechniqueforfuturewirelesscommunication,hasbeenrecentlyproposedtodynamicallyacce