In a majority of research on covert communications, knowledge about channel state
information (CSI) of main channel and/or warden channel is assumed to be known or …

Covert communications have arisen as an effective communications security measure that
overcomes some of the limitations of cryptography and physical layer security. The main …

This paper investigates the tradeoff of the communication link and the eavesdropping link in
covert communication in the presence of a full-duplex (FD) receiver. When a warden (Willie) …

Covert communication achieved by using the full-duplex (FD) receiver has wide
applications. Specifically, the FD receiver can emit artificial noise to prevent the signal of …