Building Cognitive Radio System Using Matlab Cognitive radio is
an emerging and fascinating technology for the opportunistic use
of under-utilized spectrum that promises to change the future
technological trends forever if employed properly. This work
focuses on the practical implementation of a cognitive radio
network. The electromagnetic radio spectrum is a licensed
resource which is carefully managed by governments to ensure
secure and reliable wireless communication. Today the radio
spectrum is managed in a way that a wireless service provider
buys the license for one or more spectrum bands and only its
users, termed as legacy or Primary Users(PUs) are allowed to
access these bands and operate there.