… we investigate covert communications in an active reconfigure intelligent surface (RIS) aided
multipleinput single-output non-orthogonal multiple access system. To solve the covert rate …

… Then, we analyze the achievable rates of active and passive RIS systems with the … covert
communication by deriving exact expressions for the DEP of the active RIS and passive RIS…

… If it does, how can the active-RIS be deployed? … the covert communication performance for
active-RIS-aided NOMA systems, where both the paired NOMA users are aided by active-RIS. …

… , a passive RIS-assisted MISO covert SR communication … RIS (Alice) to SRx (Bob), which
is more covert. We aim to maximize the achievable rate of PTx by jointly optimizing the active …

… grouping on the covert communication performance of an active reconfigurable intelligent …
maximize the covert communication rate. To tackle the unsolvable covert communication rate …

… covert communications assisted by a simultaneously transmitting and reflecting reconfigurable
intelligent surface (STAR-RIS). … by jointly optimizing the active and passive beamformers. …

… when active-RIS is deployed to aid covert communications in … achieve the enhanced covert
communication performance in … , we deploy an active-RIS to aid covert communications in a …

… active RIS-RS-NOMA-aided communication system to improve the performance of covert …
by deriving the closed expressions for the OP, covert rate, and detection error probability (DEP) …

… covert capacity. The aforementioned work used RIS to assist active covert communication. …
Specifically, in this paper, a RIS-based passive covert communication scheme is proposed. …

… actively generates jamming signals to establish an active … analyze the covert communication
performance of the STAR-RIS-… we can obtain analytical expressions for the DEP and covert …