Traditional spectrum allocation policies may result in temporarily unused radio spectrum.
Cognitive radio (CR) has emerged as a promising technology to exploit the radio spectrum …

Cognitive radio (CR) networks can re-use the RF spectrum licensed to a primary user (PU)
network, provided that the interference inflicted to the PUs is carefully controlled. However …

In cognitive radio networks, it is often impossible to have regular information exchange
between PUs and SUs. This implies that SUs are unable to obtain up-to-date channel …

A cognitive radio network is a multiuser system, in which different users compete for limited
resources in an opportunistic manner, interacting with each other for access to the available …

We investigate the problem of power allocation to secondary users (SUs) in underlay
cognitive radio networks (CRNs), where the channel state information (CSI) pertaining to the …

We propose a robust distributed uplink power allocation algorithm for underlay cognitive
radio networks (CRNs) with a view to maximizing the social utility of secondary users (SUs) …

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

We consider power control in cognitive radio networks where secondary users identify and
exploit instantaneous and local spectrum opportunities without causing unacceptable …

The deployment of cognitive radio networks enables efficient spectrum sharing and
opportunistic spectrum access. It also presents new challenges to the classical problem of …

We consider a cognitive radio network in which a set of base stations make opportunistic
unlicensed spectrum access to transmit data to their subscribers. As the spectrum of interest …