Covert Capacity of Non-Coherent Rayleigh-Fading Channels

The covert capacity is characterized for a non-coherent fast Rayleigh-fading wireless channel, in which a legitimate user wishes to communicate reliably with a legitimate receiver while escaping detection from a warden. It is shown that the covert capacity is achieved with an amplitude-constrained i...

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Bibliographic Details
Published in:IEEE transactions on information theory 2020-04, Vol.66 (4), p.1979-2005
Main Authors: Tahmasbi, Mehrdad, Savard, Anne, Bloch, Matthieu R.
Format: Article
Language:English
Subjects:
Channel capacity
Codes
Cognitive radio
Communication system security
Computer Science
Covert communication
Fading
Networking and Internet Architecture
non-coherenet channel
Nonlinear Sciences
Physical layer security
Rayleigh channels
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Summary:The covert capacity is characterized for a non-coherent fast Rayleigh-fading wireless channel, in which a legitimate user wishes to communicate reliably with a legitimate receiver while escaping detection from a warden. It is shown that the covert capacity is achieved with an amplitude-constrained input distribution that consists of a finite number of mass points including one at zero and numerically tractable bounds are provided. It is also conjectured that distributions with two mass points in fixed locations are optimal.
ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2019.2956489