During the last century, most of the meaningful frequency bands were licensed to emerging
wireless applications. Because of the static model of frequency allocation, the growing …

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 …

With tremendous growth in wireless services, the demand for radio spectrum has
significantly increased. However, spectrum resources are scarce and most of them have …

The expected shortage in spectrum supply is well understood to be primarily due to the
inefficient, static nature of current spectrum allocation policies. In order to address this …

This paper tackles the problem of Opportunistic Spectrum Access (OSA) in the Cognitive
Radio (CR). The main challenge of a Secondary User (SU) in OSA is to learn the availability …

In this paper, we deal with the problem of opportunistic spectrum access in infrastructure-
less cognitive networks. Each secondary user (SU) Tx is allowed to select one frequency …

Consider a multi-channel Cognitive Radio Network (CRN) with multiple Primary Users
(PUs), and multiple Secondary Users (SUs) competing for access to the channels. In this …

This paper studies the performance of cognitive radios in a scenario where different pairs of
radios adopt different cognition/decision making approaches. We want to assess: 1) if there …

The enormous success of wireless technology has recently led to an explosive demand for,
and hence a shortage of, bandwidth resources. This expected shortage problem is reported …

Studies showed that the static nature of the traditional spectrum allocation methods,
currently being used to share the radio spectrum, resulted in a plenty of unused spectrum …