Information security has always been a critical issue in wireless networks. Apart from other
secure techniques, covert communication emerges as a potential solution to security for …

Extensive research attentions have been devoted to studying cooperative cognitive radio
networks (CCRNs), where secondary users (SU) providing cooperative transmissions can …

Covert communication is crucial to preventing the warder's detection of wireless
transmission. In general, small transmit power is required to satisfy the covertness …

In this paper, we investigate the feasibility and performance of the covert communication
with a spectrum sharing relay in the finite blocklength regime. Specifically, the relay …

Due to the wireless broadcasting and broad coverage in satellite-supported Internet of
things (IoT) networks, the IoT nodes are susceptible to eavesdropping threats. Considering …

In this paper, we study the beamforming schemes via the novel frequency diverse array
(FDA) on enhancing covert communications performance. We first consider the ideal …

In this paper, we investigate the performance of covert communications in different types of a
relay system: decode-and-forward (DF), compress-and-forward (CF) and amplify-and …

Covert communication, also known as communication with low probability of detection, aims
to provide reliable communication for legal users and prevent any other user from detecting …

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

Covert communication is crucial to ensure the safety of wireless communications in Internet
of Things (IoT) systems. In this article, a multiantenna relay is employed to enhance the …