Covert MIMO Communications Under Variational Distance Constraint
Shi-Yuan Wang, Matthieu R. Bloch
Abstract
The problem of covert communication over Multiple-Input Multiple-Output (MIMO) Additive White Gaussian Noise (AWGN) channels is investigated, in which a transmitter attempts to reliably communicate with a legitimate receiver while avoiding detection by a passive adversary. The covert capacity of the MIMO AWGN channel is characterized under a variational distance covertness constraint when the MIMO channel matrices are static and known. The characterization of the covert capacity is also extended to a class of channels in which the legitimate channel matrix is known but the adversary’s channel matrix is only known up to a rank and a spectral norm constraint.
Topics & Concepts
Additive white Gaussian noiseMIMOChannel (broadcasting)Computer scienceTransmitterConstraint (computer-aided design)Channel capacityTopology (electrical circuits)Matrix (chemical analysis)AlgorithmMatrix normCovertNoise (video)Norm (philosophy)GaussianGaussian noiseRank (graph theory)Covert channelMathematicsSignal-to-noise ratio (imaging)Eigenvalues and eigenvectorsMatrix algebraMathematical optimizationClass (philosophy)Theoretical computer scienceNoise measurementWhite noiseWireless Communication Security TechniquesInternet Traffic Analysis and Secure E-votingDistributed Sensor Networks and Detection Algorithms