Engineering and Technology

Two-dimensional and high-order directional information modulations for secure communications based on programmable metasurface

H. Xu, J. W. Wu, et al.

Discover a groundbreaking solution to the inherent security risks of conventional wireless communication! A team of researchers, including Hui Xu, Jun Wei Wu, Zheng Xing Wang, Rui Wen Shao, Han Qing Yang, and Tie Jun Cui, have developed a directional information modulation scheme that not only enhances the safety of data transmission but also supports high-order modulation schemes like 8PSK, 16QAM, and 64QAM.

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Index

Abstract

Conventional wireless communication suffers from inherent security risks due to indiscriminate information transmission. Directional information modulation (DIM) offers a solution by generating correct constellation symbols in desired directions and distorting them in undesired directions. Existing DIM schemes have limitations in bulkiness, energy consumption, cost, and 2D/high-order modulation support. This paper proposes a DIM scheme using a 2-bit programmable metasurface (PM) to overcome these limitations. A discrete optimization algorithm optimizes digital coding sequences, enabling multi-directional beam generation and transmission of correct constellation symbols. The scheme successfully realizes 8PSK, 16QAM, and 64QAM constellations in multi-channel modes, demonstrating a significant advancement in physical-layer security for communication systems.

Publisher

Nature Communications

Published On

Jul 20, 2024

Authors

Hui Xu, Jun Wei Wu, Zheng Xing Wang, Rui Wen Shao, Han Qing Yang, Tie Jun Cui

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