Abstract Cognitive Radio Networks have been emerged as a promising solution for solving
the problem of spectrum scarcity and improving spectrum utilization by opportunistic use of …

This paper addresses the problem of accurately modeling the spectrum occupancy patterns
of real radio communication systems, which is an essential aspect in the study of cognitive …

Due to exponential growth in demand for radio spectrum for wireless communication
networking, the radio spectrum has become over-crowded. The fixed spectrum allocation …

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 …

ABSTRACT A basic problem facing the future in wireless systems is where to find suitable
spectrum bands to fulfill the demand of future services. While all of the radio spectrum is …

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 …

Cognitive radio provides a basis for addressing the practical issue of spectrum scarcity. This
issue has been raised due to the continuing advances in wireless technology, which has led …

Spectrum occupancy models are very useful in cognitive radio designs. They can be used to
increase spectrum sensing accuracy for more reliable operation, to remove spectrum …

Cognitive radio networks have been proposed as a solution to both spectrum inefficiency
and spectrum scarcity problems. However, they face to a unique challenge based on the …

Cognitive radios are expected to play a major role towards meeting the exploding traffic
demand over wireless systems. A cognitive radio node senses the environment, analyzes …