Due to the under-utilization problem of the allocated radio spectrum, cognitive radio (CR)
communications have recently emerged as a reliable and effective solution. Among various …

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 …

The spectrum sensing problem has gained new aspects with cognitive radio and
opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive …

Spectrum decision is the ability of a cognitive radio (CR) to select the best available
spectrum band to satisfy secondary users'(SUs') quality of service (QoS) requirements …

Widely regarded as one of the most promising emerging technologies for driving the future
development of wireless communications, cognitive radio has the potential to mitigate the …

Networking over UHF white spaces is fundamentally different from conventional Wi-Fi along
three axes: spatial variation, temporal variation, and fragmentation of the UHF spectrum …

The 2010 FCC ruling on white spaces proposes relying on a database of incumbents as the
primary means of determining white space availability at any white space device (WSD) …

Traditionally, interference protection is guaranteed through a policy of spectrum licensing,
whereby wireless systems get exclusive access to spectrum. This is an effective way to …

Driven by regulatory initiatives and radio technology advances, opportunistic spectrum
access has the potential to mitigate spectrum scarcity and meet the increasing demand for …

Throughput maximization is one of the main challenges in cognitive radio ad hoc networks,
where the availability of local spectrum resources may change from time to time and hop by …