Physical layer security (PLS) has emerged as a new concept and powerful alternative that
can complement and may even replace encryption-based approaches, which entail many …

Wireless energy harvesting (EH) is a promising solution to prolong lifetime of power-
constrained networks such as military and sensor networks. The high sensitivity of energy …

The future sixth generation (6G) wireless communication networks will face the challenges
of large-scale connections green communication. To meet these requirements, cognitive …

The spectrum efficiency (SE) and security of the secondary users (SUs) in the cognitive radio
networks (CRNs) have become two main issues due to the limitation interference to the …

This paper investigates the secrecy performance of a two-user downlink non-orthogonal
multiple access systems. Both single-input and single-output and multiple-input and single …

We analyze a secure dual-hop mixed radio frequency-free space optical (RF-FSO) downlink
simultaneous wireless information and power transfer system. The FSO link and all RF links …

The recent advancements in hardware miniaturization capabilities have boosted the
diffusion of systems based on Energy Harvesting (EH) technologies, as a means to power …

This paper considers a secure nonorthogonal multiple access system, where confidential
messages are transmitted from a base station to multiple legitimate destinations and …

In this work, we analyze the secrecy outage performance of a dual-hop relay system
composed of multiple-input-multiple-output radio-frequency (RF) links and a free-space …

Cyber-security threats and issues have been exponentially increasing over the last two
decades, including in cognitive radio networks. These attacks and vulnerabilities negatively …