A Survey of Covert Communication on AWGN Channels 


Vol. 46,  No. 12, pp. 2109-2122, Dec.  2021
10.7840/kics.2021.46.12.2109


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  Abstract

In this paper, we consider the problem of covert communication over additive white Gaussian noise (AWGN) channels and provide an overview of the information-theoretic limits on the amount of information that can be conveyed. No more than σ(√n) bits can be sent reliably to the legitimate receiver in n independent channel uses while concealing from the warden the very existence of transmissions. A recent finding that a non-zero asymptotic rate can be obtained if the warden has noise variance measurement uncertainty is discussed. Results in the existing literature are presented, including the optimality of the Gaussian signaling in terms of maximizing the mutual information under the covert constraint. We then investigate the possibility of covert communication using orthogonal sparse superposition (OSS) codes, a new class of sparse superposition codes (SPARCs).

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  Cite this article

[IEEE Style]

D. Han and N. Lee, "A Survey of Covert Communication on AWGN Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 12, pp. 2109-2122, 2021. DOI: 10.7840/kics.2021.46.12.2109.

[ACM Style]

Donghwa Han and Namyoon Lee. 2021. A Survey of Covert Communication on AWGN Channels. The Journal of Korean Institute of Communications and Information Sciences, 46, 12, (2021), 2109-2122. DOI: 10.7840/kics.2021.46.12.2109.

[KICS Style]

Donghwa Han and Namyoon Lee, "A Survey of Covert Communication on AWGN Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 12, pp. 2109-2122, 12. 2021. (https://doi.org/10.7840/kics.2021.46.12.2109)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880