|Covert MIMO Communications under Variational Distance Constraint
|Shi-Yuan Wang, Matthieu R. Bloch, Georgia Institute of Technology, United States
|P.1: Covert Communications
|Cryptography, Security and Privacy
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|We consider the problem of covert communication over Multiple-Input Multiple-Output (MIMO) Additive White Gaussian Noise (AWGN) channels, in which a transmitter attempts to reliably communicate with a legitimate receiver while ensuring a low probability of detection by an adversary. We exactly characterize the covert capacity under a variational distance covertness constraint when MIMO channel matrices are static and known to all parties. We also characterize the covert capacity for a class of channels in which the legitimate channel matrix is known but the adversary's channel matrix is only known to satisfy a rank and a spectral norm constraint.