Cognitive radios hold tremendous promise for increasing spectral efficiency in wireless
systems. This paper surveys the fundamental capacity limits and associated transmission …

In order to mitigate the shortage of wireless spectrum, the appealing concepts of cooperative
communication techniques and cognitive radio (CR) networks have been combined for the …

Cognitive Radio Communications and Networks gives comprehensive and balanced
coverage of the principles of cognitive radio communications, cognitive networks, and …

This paper evaluates the outage probability of cognitive relay networks with cooperation
between secondary users based on the underlay approach, while adhering to the …

The concept of cognitive radio (or secondary spectrum access) is currently under
investigation as a promising paradigm to achieve efficient use of the frequency resource by …

In this correspondence, an adaptive cooperation diversity scheme with best-relay selection
is proposed for multiple-relay cognitive radio networks to improve the performance of …

Cognitive Radio has been recognized as a promising way to improve spectrum efficiency of
wireless communications by exploiting under-utilized licensed spectrum in temporal …

In recent years, the excessive energy consumption in wireless communication systems has
been increasingly critical, and environmental and financial considerations have motivated a …

In this paper, we consider power allocation in multiband cognitive radio (CR) networks,
where multiple secondary users (SUs) transmit via a common relay and compete for the …

We investigate opportunistic cooperation between secondary (femtocell) users and primary
(macrocell) users in cognitive femtocell networks. We consider two models for such …