A Security-Enhanced Precoding Scheme for RIS-Assisted THz Communication Systems

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2026-02-16 DOI:10.1109/LCOMM.2026.3665355

Mengliang Li;Chenyu Wu;Shuai Han;Weixiao Meng

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引用次数: 0

Abstract

Terahertz (THz) communication, a promising 6G candidate boasting ultra-wide bandwidth, confronts critical challenges including severe path loss and the inherent beam splitting effect in wideband scenarios. Reconfigurable intelligent surfaces (RIS) offer an effective means to dynamically manipulate wireless channels for performance enhancement. This letter proposes a novel RIS-assisted terahertz physical layer security (PLS) precoding scheme aimed at 6G ultra-high-speed secure communication requirements, providing a core solution to the security transmission challenges in THz broadband scenarios. The scheme precisely resolves the double beam splitting bottleneck caused by the coupling between RIS and THz broadband through beam focusing and shaping technology, achieving directional concentration of signal energy and leakage suppression from a spatial perspective; further innovatively, the artificial noise (AN) is projected into the channel null space of legitimate users, leveraging the ultra-wide bandwidth advantage of THz to construct a full-band interference barrier. In the end, the simulation results demonstrate the effectiveness of the proposed method.

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ris辅助太赫兹通信系统的安全性增强预编码方案

太赫兹（THz）通信是一种具有超宽带带宽的有前途的6G候选者，面临着宽带场景下严重的路径损耗和固有的波束分裂效应等关键挑战。可重构智能表面（RIS）为动态控制无线信道提供了一种有效的手段。本文提出了一种新的ris辅助太赫兹物理层安全（PLS）预编码方案，针对6G超高速安全通信需求，为太赫兹宽带场景下的安全传输挑战提供了核心解决方案。该方案通过波束聚焦和整形技术，精确解决了RIS和太赫兹宽带耦合造成的双波束分裂瓶颈，从空间角度实现了信号能量的定向集中和泄漏抑制；进一步创新的是，将人工噪声（AN）投射到合法用户的信道零空间，利用太赫兹的超宽带优势构建全频段干扰屏障。最后，仿真结果验证了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.