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

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

Dynamic spectrum policies combined with software defined radio are powerful means to
improve the overall spectral efficiency allowing the development of new wireless services …

Cognitive radio ad hoc networks (CRAHNs) constitute a viable solution to solve the current
problems of inefficiency in the spectrum allocation, and to deploy highly reconfigurable and …

A cognitive radio (CR) network should be able to sense its environment and adapt
communication to utilize the unused licensed spectrum without interfering with licensed …

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 …

A number of algorithmic and protocol assumptions taken for granted in the design of existing
wireless communication technologies need to be revisited in extending their scope to the …

Radio spectrum resource is of fundamental importance for wireless communication. Recent
reports show that most available spectrum has been allocated. While some of the spectrum …

Cognitive radio (CR) is an enabling technology to allow unlicensed (secondary) users to
exploit the spectrum allocated to licensed (primary) users in an opportunistic manner. CR is …

Cognitive radio networks hold the key to achieving better radio bandwidth utilization and
improving the quality of wireless applications. The next step in this fast emerging paradigm …