Every attempt to access to the Internet through a Web browser, email sent, VPN connection,
VoIP call, instant message or other use of telecommunications systems involves …

We investigate the secrecy transmission of uplink non-orthogonal multiple access (NOMA)
with the aid of energy harvesting (EH) jammers. During each time frame, communication is …

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 integration of intelligent reflecting surface (IRS) and multiple access provides a
promising solution to improved coverage and massive connections at low cost. However …

We investigate a secrecy-enhancing design for cooperative downlink and uplink non-
orthogonal multiple access (NOMA) transmissions with an untrusted relay. A source uses the …

Intelligent reflecting surface (IRS) is deemed a promising technique for future wireless and
mobile technologies due to its ability to reconfigure the radio propagation environment. In …

We investigate physical layer security of an uplink NOMA system consisting of one base
station, multiple users and one eavesdropper. During each uplink transmission, two users …

In this paper, we propose a novel beamforming design to enhance physical layer security of
a non-orthogonal multiple access (NOMA) system with the aid of artificial noise (AN). The …

Nonorthogonal multiple access (NOMA) has been viewed as a potential candidate for the
upcoming generation of wireless communication systems. Comparing to traditional …

In this article, we study the physical-layer security (PHY-security) improvement method for a
downlink nonorthogonal multiple access (NOMA) system in the presence of an active …