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 …

It is challenging to covert communication under channel distribution information (CDI)
uncertainty caused by limited feedback and rapid-changing channels. This letter …

In this letter, we propose two resource allocation schemes for covert communication in a
downlink NOMA system, where the transmitter can send information simultaneously both to …

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 …

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 paper, we investigate covert communication in an intelligent reflecting surface (IRS)-
assisted non-orthogonal multiple access (NOMA) system, where a legitimate transmitter …

In this letter, we investigate an active reconfigurable intelligent surface (RIS) and non-
orthogonal multiple access (NOMA)-aided covert communication system with hardware …

The paper exploits overt information of non-orthogonal multiple access (NOMA) systems for
camouflage to hide covert information. The optimum strategy of hiding information at the …

This letter proposes a joint covert and secure transmission scheme in the non-orthogonal
multiple access (NOMA) networks against internal eavesdropping and external monitoring …

In this paper, we apply covert communications to reconfigurable intelligent surface (RIS)-
assisted non-orthogonal multiple access (NOMA) networks, where a legitimate transmitter …