Cognitive radio (CR) is the enabling technology for supporting dynamic spectrum access:
the policy that addresses the spectrum scarcity problem that is encountered in many …

With the rapid proliferation of new technologies and services in the wireless domain,
spectrum scarcity has become a major concern. The allocation of the Industrial, Medical and …

Cognitive radio (CR) technology is envisaged to solve the problems in wireless networks
resulting from the limited available spectrum and the inefficiency in the spectrum usage by …

In cognitive radio (CR) networks, identifying the available spectrum resource through
spectrum sensing, deciding on the optimal sensing and transmission times, and …

Cognitive radio networks have been recognized as a promising paradigm to address the
spectrum under-utilization problem. To improve spectrum efficiency, many operations such …

Cognitive radio (CR) technology enables the opportunistic use of the portions of the licensed
spectrum by the CR users, while ensuring low interference to the primary user (PU) activity …

The Cognitive Radio and the Cognitive Radio Networks have recently become one of the
most intensively studied paradigms in wireless communications. The main distinctive …

Cognitive radio (CR) technology allows devices to opportunistically use the vacant portions
of the licensed wireless spectrum. However, the available spectrum changes dynamically …

With the rapid development of wireless communications technologies, radio spectrum has
become a type of extremely scarce resources in meeting the increasing demands for …

Cognitive radios have been identified as a solution to the crowded spectrum issue. With the
realization of cognitive radio networks came the recognition that both new and old security …