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 …

Non-orthogonal multiple access (NOMA) serves multiple users simultaneously via the same
resource block by exploiting superposition coding at the transmitter and successive …

In a downlink non-orthogonal multiple access (NOMA) system, the reliable transmission of
cell-edge users cannot be guaranteed. On the other hand, the presence of eavesdroppers …

A key feature of the non-orthogonal multiple access (NOMA) technique is that users with
better channel conditions have prior knowledge about the information of other weak users …

Non-orthogonal multiple access (NOMA) systems have indicated that they can provide
higher spectral efficiency and secrecy capability compared with orthogonal multiple access …

This paper proposes exploiting multiple aerial reconfigurable intelligent surfaces (ARISs) for
the secrecy performance enhancement of non-orthogonal multiple access (NOMA) …

In this paper, we study secrecy simultaneous wireless information and power transfer
(SWIPT) in downlink non-orthogonal multiple access (NOMA) systems comprising a base …

This paper studies the secure transmission for downlink multiple-input single-output (MISO)
non-orthogonal multiple access (NOMA) system in which imperfect channel state information …

In this correspondence, we investigate the reliability and the security of the ambient
backscatter (AmBC) non-orthogonal multiple access (NOMA) systems, where the source …

Simultaneous refracting/transmitting and reflecting reconfigurable intelligent surface (STAR-
RIS) has emerged as a potential technology for future-generation wireless communication …