We consider an underlay cognitive radio (CR) communication system in which a cognitive
secondary user (SU) can access multiple primary spectrum channels only when its …

In a cognitive radio network, opportunistic spectrum access (OSA) to the underutilized
spectrum involves not only sensing the spectrum occupancy but also probing the channel …

The authors consider a cognitive radio network overlaying on top of a legacy primary
network in which a secondary user is allowed to access primary channel by overhearing …

Cognitive radio techniques allow secondary users (SU's) to opportunistically access
underutilized primary channels that are licensed to primary users. We consider a group of …

In this paper, we consider the probing order and stopping problem arising from the
identification of spectrum holes in multi-channel cognitive radio networks, in which a …

We develop channel-aware opportunistic spectrum access strategies for cognitive radio
networks consisting of multiple secondary users. In addition to balancing between the cost of …

Cognitive radios have emerged as a key enabler for opportunistic spectrum access, in order
to tackle the wireless spectrum scarcity and under utilization problems over the past two …

In this paper, the problem of opportunistic channel sensing and access in cognitive radio
networks when the sensing is imperfect and a secondary user can access up to a limited …

This paper considers a scenario in which a secondary user (SU) opportunistically accesses
a channel allocated to some primary network (PN) that switches between idle and active …

In this work, we address the spectrum utilization problem in cognitive radio (CR) networks, in
which a CR can only utilize spectrum opportunities when the channel is idle. One challenge …