用于提高空地一体化网络保密率的 RIS 辅助双波束成形优化算法

IF 4.1 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS
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引用次数: 0

摘要

高频段对支持 5G/6G 系统至关重要,但却面临着信号被障碍物阻挡的挑战。这归因于无线电直线度和短距离造成的巨大路径损耗。为了应对这些挑战,人们越来越关注利用非地面网络(NTN)和可重构智能表面(RIS),利用高空卫星作为基站或终端。在三维 NTN 系统中,由于环境的开放性,无线信号容易被窃听,这是一个显著的缺点。为了减轻这种脆弱性,本文介绍了一种旨在最大限度提高保密率的算法。所提出的算法通过微调基站和 RIS 波束成形向量来优化安全性能。这种优化是通过连续的凸近似和最小化-最大化算法实现的。仿真结果表明,所提算法在保密率方面优于现有技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
RIS-aided double beamforming optimization algorithm for improving secrecy rate in space–ground integrated networks
The high-frequency band, crucial for supporting the 5G/6G system, faces challenges of signal obstruction by obstacles. This is attributed to significant path loss resulting from radio straightness and short radio distance. To address these challenges, there is a growing interest in leveraging non-terrestrial networks (NTNs) and reconfigurable intelligent surfaces (RISs), utilizing high-altitude satellites as base stations or terminals. Within a three-dimensional NTN system, the vulnerability of wireless signals to eavesdropping due to the open nature of the environment is a notable drawback. To mitigate this vulnerability, this paper introduces an algorithm designed to maximize the secrecy rate. The proposed algorithm optimizes security performance by fine-tuning the base station and RIS beamforming vectors. This optimization is achieved through successive convex approximation and minorization–maximization algorithms. Simulation results affirm the superiority of the proposed algorithm in terms of secrecy rate over existing techniques.
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来源期刊
ICT Express
ICT Express Multiple-
CiteScore
10.20
自引率
1.90%
发文量
167
审稿时长
35 weeks
期刊介绍: The ICT Express journal published by the Korean Institute of Communications and Information Sciences (KICS) is an international, peer-reviewed research publication covering all aspects of information and communication technology. The journal aims to publish research that helps advance the theoretical and practical understanding of ICT convergence, platform technologies, communication networks, and device technologies. The technology advancement in information and communication technology (ICT) sector enables portable devices to be always connected while supporting high data rate, resulting in the recent popularity of smartphones that have a considerable impact in economic and social development.
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