Security is considered a critical issue in the deployment of 5G networks because of the
vulnerability of information that can be intercepted by eavesdroppers in wireless …

Nonorthogonal multiple access (NOMA) assisted semi-grant-free transmission admits grant-
free users to access the channels otherwise solely occupied by grant-based users, and has …

The power domain non-orthogonal multiple access (NOMA) technique introduces one of the
fundamental characteristics and it exhibits the possibility of users to decode the messages of …

This study investigates the secrecy performance of a rate-splitting multiple-access system
inspired by cognitive radio principles, where the primary user takes on the role of a potential …

We study a hybrid satellite-terrestrial cognitive network (HSTCN) relying on non-orthogonal
multiple access (NOMA) interconnecting a satellite and multiple terrestrial nodes. In this …

In this paper, we investigate cooperative secure communications in a four-node cognitive
radio network where the secondary receiver is treated as a potential eavesdropper with …

In this paper, we consider the physical-layer security for the primary system in an underlay
cognitive radio model which comprises of a primary source–destination pair, a secondary …

Recently, physical-layer security (PLS) has been reported in many literature (ie,[1]-[4]) as an
efficient approach to obtain security for wireless communication systems. For the secure …

In this paper, we investigate physical layer security for multiple decode-and-forward (DF)
relaying underlay cognitive radio networks (CRNs) with fixed transmit power at the …

In recent years, the access of massive communication devices leads to the insufficient
spectrum resources of wireless networks. One of the practical means to resolve the problem …