spectrum sensing\Spectrum sensing in cognitive radio networks_ requirements chal

Opportunisticunlicensedaccesstothe(tem-porarily)unusedfrequencybandsacrossthelicensedradiospectrumiscurrentlybeinginves-tigatedasameanstoincreasetheefficiencyofspectrumusage.Suchopportunisticaccesscallsforimplementationofsafeguardssothatongo-inglicensedoperationsarenotcompromised.Among