Achieving Covert mmWave Communication Against Randomly Distributed Wardens
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Published version
Embargoed until: 5555-01-01
Embargoed until: 5555-01-01
Volume
2023-May
Pagination
3896 - 3901
DOI
10.1109/ICC45041.2023.10279079
ISSN
1550-3607
Metadata
Show full item recordAbstract
This paper investigates the covert millimeter wave (mmWave) communication in the finite block-length regime, where spatially random wardens attempt to determine the presence of transmission. First, we derive a novel expression of covertness constraint by using the tools of stochastic geometry, based on which the expression of average effective covert throughput (AECT) is also presented. Then, considering the constraint of maximal available block-length, the optimization problem for maximizing the AECT is formulated, and the optimal transmit power and block-length are analytically determined. Our results show the superiority of our optimization in terms of AECT in contrast to the fixed block-length case, and the improvement is more significant when the density of wardens becomes large. Furthermore, the performance of covert mmWave communication can indeed be improved via increasing the number of antennas even there exist random distributed wardens.