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 …

Cognitive radio (CR) has emerged as a promising technology to exploit the unused portions
of spectrum in an opportunistic manner. The fixed spectrum allocation of governmental …

This paper provides an overview of cognitive radio (CR) networks, with focus on the recent
advances in resource allocation techniques and the CR networks architectural design. The …

Cognitive radio (CR) can successfully deal with the growing demand and scarcity of the
wireless spectrum. To exploit limited spectrum efficiently, CR technology allows unlicensed …

The cognitive radio is an emerging technology that enables dynamic spectrum access in
wireless networks. The cognitive radio is capable of opportunistically using the available …

We consider a point-to-multipoint cognitive radio network that shares a set of channels with
a primary network. Within the cognitive radio network, a base station controls and supports a …

This paper discusses the fundamental principles of a cognitive-radio RF system. The key
points required to achieve a true cognitive-radio device are outlined. The operation of a …

Femtocell is envisioned as a highly promising solution for indoor wireless communications.
The spectrum allocated to femtocells is traditionally from the same licensed spectrum bands …

This paper considers the primary user activity or the subchannel availability in optimally
distributing the available resources for an orthogonal frequency-division multiple-access …

This paper presents new design formulations that aim at optimizing the performance of an
orthogonal frequency-division multiple-access (OFDMA) ad hoc cognitive radio network …