OFDMA has been selected as the multiple access scheme for state-of-the-art wireless
communication systems. Efficient resource allocation in OFDMA wireless networks is …

Cognitive radio networks hold the key to achieving better radio bandwidth utilization and
improving the quality of wireless applications. The next step in this fast emerging paradigm …

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 …

Cognitive networks enable efficient sharing of the radio spectrum. Multi-hop cognitive
network is a cooperative network in which cognitive users take help of their neighbors to …

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 …

We consider a cognitive radio network in which a set of base stations make opportunistic
spectrum access to support fixed-location wireless subscribers within their cells. The …

Cognitive radio (CR) dynamically accessing inactive radio spectrum of the primary system
(PS) at link level has attracted a lot of research interests. The cognitive radio network (CRN) …

Opportunistic spectrum access (OSA) networks have emerged as a hot research topic
following the publication of Mitola's seminal paper on cognitive radio network. Success of …

We formulate a scheduling problem that takes into account different hardware delays
experienced by the secondary users (SUs) in a centralized cognitive radio network (CRN) …

In this paper, we develop an opportunistic spectrum-scheduling scheme for multichannel
cognitive radio networks. In the proposed scheme, the primary user activity and channel …