This paper investigates the achievable message transmission rate of covert communication
over slow fading channels where the channel coefficient remains unchanged over a finite …

Covert communication is to achieve a reliable transmission from a transmitter to a receiver
while guaranteeing an arbitrarily small probability of this transmission being detected by a …

Fundamental limits of covert communication have been studied for different models of scalar
channels. It was shown that, over n independent channel uses, O (√ n) bits can transmitted …

We consider covert communication, ie, hiding the presence of communication from an
adversary for multiple-input multiple-output (MIMO) additive white Gaussian noise (AWGN) …

Covert communications enable a transmitter to send information reliably in the presence of
an adversary, who looks to detect whether the transmission took place or not. We consider …

This paper considers beamforming techniques for covert communication over multiple input
single output (MISO) channels with finite blocklength. We first show that the optimal input …

We consider the problem of covert communication over continuous-time additive white
Gaussian noise (AWGN) channels under spectral mask constraints. In addition to requiring …

In this paper, we study covert communication over a compound discrete memoryless
channel (DMC). There are two channel states in which one of them is arbitrarily chosen and …

A covert communication system under block fading channels is considered, where users
experience uncertainty about their channel knowledge. The transmitter seeks to hide the …

We consider the problem of covert communication over a state-dependent channel, where
the transmitter has non-causal knowledge of the channel states. Here,“covert” means that …