With the rapid deployment of new wireless devices and applications, the last decade has
witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum …

Cognitive radio technology, a revolutionary communication paradigm that can utilize the
existing wireless spectrum resources more efficiently, has been receiving a growing …

We propose a two-phase protocol based on cooperative decode-and-forward relaying for a
secondary system to achieve spectrum access along with a primary system. The primary and …

This paper considers the design of efficient strategies that allow cognitive users to choose
frequency bands to sense and access among multiple bands with unknown parameters …

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 …

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 …

This paper considers spectrum sharing for wireless communication between a cognitive
radio (CR) link and a primary radio (PR) link. It is assumed that the CR protects the PR …

In this paper, we consider a cognitive radio (CR) network where a secondary (cognitive)
user shares the spectrum for transmission with a primary (non-cognitive) user over block …

Cognitive radio is emerging as a promising technique to improve the utilization of the radio
frequency spectrum. In this paper, we consider the problem of spectrum sharing among …

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