A number of studies have shown the abundance of unused spectrum in the TV bands. This
is in stark contrast to the overcrowding of wireless devices in the ISM bands. A recent trend …

In an effort to improve radio spectrum management and promote a more efficient use of it,
regulatory bodies are currently trying to adopt a new spectrum access model. At the same …

Studies showed that the static nature of the traditional spectrum allocation methods,
currently being used to share the radio spectrum, resulted in a plenty of unused spectrum …

In the recently-suggested dynamic spectrum allocation policy of cognitive radio networks [1]–
[3], sensing/monitoring of spectrum availability is identified as a key requirement. To meet …

Are you involved in designing the next generation of wireless networks? With spectrum
becoming an ever scarcer resource, it is critical that new systems utilize all available …

Under the current system of spectrum allocation, rigid partitioning has resulted in vastly
underutilized spectrum bands, even in urban locales. Cognitive radios have been proposed …

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 …

Spectrum scarcity is the major challenge facing all parties working in the
telecommunications industry. As recently shown, the main problem of spectrum …

Cognitive radio improves spectrum efficiency by allowing secondary users (SU) to
dynamically exploit the idle spectrum owned by primary users (PU). This paper studies …

A major shift in wireless communication is now emerging with the development of cognitive
radios, which attempt to share spectrum in a fundamentally new way. Cognitive radios …