Due to the increasing demand for new wireless services and applications as well as the
increasing number of wireless users, the available spectrum is becoming increasingly …

Under utilization of radio spectrum in traditional wireless communication systems [30], along
with the increasing spectrum demand from emerging wireless applications, is driving the …

Currently, the radio spectrum is statically allocated and divided between licensed and
unlicensed frequencies. Due to this inflexible policy, some frequency bands are growing in …

The cognitive radio (CR) paradigm for designing next‐generation wireless communications
systems is becoming increasingly popular, and different aspects of it are being implemented …

Cognitive radio (CR) has been considered as a potential candidate for addressing the
spectrum scarcity problem of future wireless networks. Since its conception, several …

With the rapid deployment of new wireless devices and applications, the last decade has
witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum …

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Cognitive Radios have been receiving increasing attention in academia, industry, and
government. This has come after several studies indicating that up to 90% of the allocated …

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 development of wireless communication, the scarcity of spectrum becomes
more and more prominent. Cognitive radio is proposed to overcome the problem of low …