This paper considers a multiple-input multiple-output (MIMO) non-orthogonal multiple
access (NOMA) cognitive radio (CR) system with an unmanned aerial vehicle relay (UR). In …

This paper investigates physical layer security (PLS) in cognitive radio inspired non-
orthogonal multiple access (CR-NOMA) networks with multiple primary and secondary …

In this paper, we investigate the secrecy performance of an unmanned aerial vehicle (UAV)-
based full-duplex (FD) two-way relay non-orthogonal multiple access (TWR-NOMA) system …

In this paper, we investigate the physical layer security of a non-orthogonal multiple access
(NOMA) based downlink hybrid satellite-terrestrial relay network where the satellite …

This letter studies the secure transmission issue of non-orthogonal multiple access (NOMA)
based cognitive radio networks (CRNs) with imperfect channel state information (CSI) …

In view of the scarcity of spectrum resources in wireless communication, it is studied in this
paper over the two-hop cognitive secrecy transmission scheme of decoding and forwarding …

The efficient spectrum utilization of non-orthogonal multiple access (NOMA) and flexible
mobility of unmanned aerial vehicle (UAV) enable NOMA UAV to become a prospective …

In this paper, we propose and analyze the maximal secrecy capability of an unmanned
aerial vehicle (UAV)-based relay non-orthogonal multiple access system. In this system, a …

The upcoming Intelligent Transportation System (ITS) supported by sixth generation (6G)
communication technologies is expected to face the great challenges of spectrum scarcity …

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 …