SHIELD: A Codebook-Based Methodology for RIS-Based Covert Communications.

Alexandros I. Papadopoulos, Dimitrios Tyrovolas, Alexandros Pitilakis, Panagiotis D. Diamantoulakis, Antonios Lalas, Konstantinos Votis, Nikolaos V. Kantartzis, Sotiris Ioannidis, Christos Liaskos

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