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 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.

翻译：在多投入多输出(MOIMO)Aditive White Gaussian Noise(AWGN)频道上的秘密通信问题得到调查,其中发射机试图与合法接收器进行可靠通信,而避免被被动敌人发现;如果MOIMO频道矩阵是静态的和已知的,MIMO频道的隐蔽能力就受到变异的距离隐蔽限制;对隐蔽能力的定性也扩大到已知合法频道矩阵但敌方频道矩阵只知道等级和光谱规范约束的一类渠道。