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 this paper, we design a secure transmission scheme in hybrid automatic repeat request
(HARQ) assisted cognitive non-orthogonal multiple access (NOMA) networks, where a …

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 article, we investigate physical layer security (PLS) in non-orthogonal multiple access-
enabled (NOMA-enabled) underlay cognitive radio networks (CRNs) with outdated channel …

An underlay cognitive radio network (CRN) with non-orthogonal multiple access (NOMA) is
a promising multiple access scheme to solve the problem of scarce spectrum. This novel …

This paper employs hybrid automatic repeat request (HARQ) to assist the cognitive non-
orthogonal multiple access (NOMA) scheme for secure transmission in Internet of Things …

Cognitive radio network (CRN) and non-orthogonal multiple-access (NOMA) play the crucial
roles in the fifth generation wireless communication systems. However, the physical-layer …

In this paper, we propose an innovative framework to improve the physical layer security of
cognitive radio nonorthogonal multiple access (CR-NOMA) networks. Specifically, we …

In this paper, we investigate a secure cognitive radio network (CRN), which deploys non-
orthogonal multiple access (NOMA) to deliver a mixed multicast and unicast traffic to the …

In this paper, secure primary transmission is proposed by using a multi-antenna secondary
full-duplex non-orthogonal multiple access (NOMA) relay in cognitive radio (CR) networks …