This paper examines integrating jamming and secondary signals for covert communications
in cognitive radio networks (CRNs), aiming to enhance covertness by using jamming and …

In this study, the cascaded double κ− μ shadowed fading model is mathematically
introduced. A novel expression is obtained for the cumulative distribution function (CDF) of …

In this paper, we analyse the outage and ergodic capacity performance of the extended
generalized-K fading channel in the presence of possible temporary physical blockage …

A primary and cognitive relay spectrum sharing network is considered. The channels are
assumed to be κ-μ shadowed fading with arbitrary fading parameters. We obtained …

Extensive research attentions have been devoted to studying cooperative cognitive radio
networks (CCRNs), where secondary users (SU) providing cooperative transmissions can …

In this paper, we consider an overlay cognitive radio (CR) consisting of a primary macro-cell
and cognitive small cells of cooperative secondary base stations (SBS). We suggest …

Cognitive Radio (CR) systems utilizes the underutilized spectrum in two ways ie overlay and
underlay mode. In overlay CR, a secondary user (SU) opportunistically access primary …

Overlay mechanism offers secondary users (SUs) chances to access licensed spectrum of
primary users (PUs) to improve spectrum utilization efficiency. However, these chances …

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 investigates outage performance under overlay spectrum mode using relay-
assisted network model. Without harming the performance of the primary user (PU) …