The hidden terminal problem is known to degrade the throughput of wireless networks due
to collisions, while the exposed terminal problem results in poor performance by wasting …

This paper addresses the problem of resource allocation for systems in which a primary and
a secondary link share the available spectrum by an underlay or overlay approach. After …

This work investigates a robust energy-efficient solution for multiple-input–multiple-output
(MIMO) transmissions in cognitive vehicular networks. Our goal is to design an optimal …

In the field of wireless communication effective utilization of spectrum is the big issue which
introduces the spectrum scarcity problem. This has been resolved by Cognitive Radio …

In this paper, two resource allocation schemes for energy efficient cognitive radio systems
are proposed. Our design considers resource allocation approaches that adopt spectrum …

The capacity of cognitive radio (CR) systems can be enhanced significantly by deploying
relay nodes to exploit the spatial diversity. However, the inevitable imperfect sensing in CR …

This paper investigates the fundamental energy efficiency-spectral efficiency (EE-SE)
relationship in a multiple-input-multiple-output (MIMO) orthogonal frequency-division …

The problem of inefficient and unevenly distributed spectrum usage in industrial wireless
networks has led to the emergence of the concept of industrial cognitive radio (CR) …

In this paper, we investigate the power allocation problem in massive multiple-input-multiple-
output cognitive radio networks. We propose an orthogonal pilot sharing scheme at pilot …

In this paper, an energy-efficient cross-layer design framework is proposed for cooperative
relaying networks, which takes into account the influence of spectrum utilization probability …