Visible to the public Order-Optimal Scaling of Covert Communication over MIMO AWGN Channels

TitleOrder-Optimal Scaling of Covert Communication over MIMO AWGN Channels
Publication TypeConference Paper
Year of Publication2020
AuthorsBendary, A., Koksal, C. E.
Conference Name2020 IEEE Conference on Communications and Network Security (CNS)
Keywordsadditive white Gaussian noise channels, AWGN channels, blocklength, channel capacity, channel coding, compositionality, covert channels, covert communication, covert nats, discrete memoryless channels, effective secrecy, energy undetectability constraints, LPD communication, maximal covert coding rate, MIMO AWGN channels, MIMO communication, multiple-input multiple-output AWGN channels, order-optimal scaling law, physical layer security, probability, pubcrawl, Receivers, reliability, resilience, Resiliency, Scalability, secrecy capacity, square root law, stealth communication, telecommunication security, unit-rank MIMO, Zinc
AbstractCovert communication, i.e., communication with a low probability of detection (LPD), has attracted a huge body of work. Recent studies have concluded that the maximal covert coding rate of the discrete memoryless channels and the additive white Gaussian noise (AWGN) channels is diminishing with the blocklength: the maximum information nats that can be transmitted covertly and reliably over such channels is only on the order of the square root of the blocklength. In this paper, we study covert communication over multiple-input multiple-output (MIMO) AWGN channels. We derive the order-optimal scaling law of the number of covert nats when the maximal covert coding rate of MIMO AWGN channels is diminishing with the blocklength. Furthermore, we provide a comparative discussion for the case in which secrecy and energy undetectability constraints are combined.
Citation Keybendary_order-optimal_2020