Technical Program

Paper Detail

Paper Title Covert Communication Over a Compound Discrete Memoryless Channel
Paper IdentifierTU2.R8.2
Authors Mehrasa Ahmadipour, Sadaf Salehkalaibar, University of Tehran, Iran; Mohammad Hossein Yassaee, Institute for Research in Fundamental Sciences (IPM), Iran; Vincent Y. F. Tan, National University of Singapore, Singapore
Session Covert Communication
Location Conseil, Level 5
Session Time Tuesday, 09 July, 11:40 - 13:00
Presentation Time Tuesday, 09 July, 12:00 - 12:20
Manuscript  Click here to download the manuscript
Abstract 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 remains fixed during the transmission. The objective is to reliably send a message from the transmitter to the receiver. An adversary who is observing the channel output should not be able to infer the channel state. Two covertness metrics are considered. In the first metric, covertness is measured using the KL-divergence of the channel output marginal of each state with a fixed distribution. Different cases where such a distribution can be specified, are studied. The optimal transmission rate of each case is established. In the second metric, the covertness is measured by using the total variation distance of the channel output marginals of the two states. Upper and lower bounds on the optimal transmission covert rate are derived. The bounds match for a special case and characterize the optimal throughput.