This article focuses on covert communication in a distributed network with multiple
nonorthogonal multiple access (NOMA) systems, where each NOMA system is consisted of …

This letter considers covert communication in downlink NOMA systems, where a public
action (communication from Alice to the NOMA-weak user U1) is used to provide a cover for …

Covert communications hide the very existence of wireless transmissions and thus can
address privacy and security issues in non‐orthogonal multiple access (NOMA) systems. In …

In this paper, we investigate the covert communications in uplink nonorthogonal multiple
access (NOMA) systems with the random power allocation and multi-carrier modulation …

With the gradual promotion of the fifth generation (5G) mobile communication and Internet of
Things (IoT) applications, wireless communication transmission will be more vulnerable to …

In this letter, we investigate the covert communication in uplink non-orthogonal multiple
access (NOMA) system against a warden who can also execute successive interference …

We consider covert communication in a network with multiple non-orthogonal multiple
access (NOMA) systems, where each NOMA system consists of an Alice, a user with the …

In this letter, we investigate covert communications in uplink non-orthogonal multiple access
(NOMA) systems, where a covert user tries to transmit private information to a legitimate …

In this letter, we achieve covert communication for downlink non-orthogonal multiple access
systems by reradiating on the public user's antenna. Specifically, we formulate the problem …

This paper investigates the covert communication of cooperative non-orthogonal multiple
access (NOMA) systems, where the near user serves as a decode-and-forward (DF) relay …