Conventional optimization-driven secure relay selection relies on maximization algorithm
and accurate channel state information (CSI) of both legitimate and eavesdropper channels …

In this paper, the physical layer security of underlay cognitive decode-and-forward (DF) relay
networks is investigated, wherein one secondary transmitter (ST) exchanges confidential …

The modern and emerging wireless communication technologies are benefiting from
relaying techniques, which is already adopted in long term evolution (LTE) Release 10. The …

This paper focuses on how to effectively exploit the two-way relay cooperation for improving
the system physical-layer security with the help of the achieved diversity gain. It has been …

This paper studies the transmit antenna selection based on machine learning (ML) schemes
in untrusted relay networks. First, the exhaustive search antenna selection scheme is stated …

Physical (PHY) layer security approaches for wireless communications can prevent
eavesdropping without upper layer data encryption. However, they are hampered by …

Cooperative communication can improve the performance of communication system under
multi‐path fading conditions by relaying. If there is an eavesdropper in communication …

In this study, the physical layer security for cognitive radio network (CRN) will be
investigated in which a secondary user transmitter (SU-Tx) sends confidential information to …

Physical layer security is a promising technique to realize secure wireless communications
without relying on conventional cryptographic methods. In cooperative networks with …

This paper focuses on the complexity issue of relay selection for fifth-generation (5G) large-
scale secure two-way amplify-and-forward (TWR-AF) relay systems with massive relays and …