电子学报2023，Vol.51Issue(10)：2715-2723,9.DOI:10.12263/DZXB.20221285
智能反射面辅助的太赫兹卫星通信鲁棒安全波束成形算法
Robust Secure Beamforming Algorithm for IRS-Aided Terahertz Satellite Communication Systems
摘要
Abstract
In this paper,a robust secure beamforming scheme based on imperfect channel state information(CSI)is proposed for the intelligent reflecting surface(IRS)-aided terahertz satellite communication systems,in order to improve the physical layer security performance of the system.First,we consider a scenario where an IRS-aided terahertz satellite sys-tem adopts multicast technique to serve multiple legitimate users in the presence of multiple eavesdroppers in the coverage area,based on which a joint optimization problem is formulated in order to minimize the satellite transmit power under the constraints constructed by the achievable rate(AR)and the achievable secrecy rate(ASR)requirements of each legitimate users.Secondly,considering that AR and ASR are non-convex probabilistic constraints caused by imperfect CSI,an ap-proach associated with the second-order Taylor expansion and S-procedure is proposed to transform the non-convex con-straints.Further,the joint optimization scheme of the phase shift of IRS and the transmit power of satellite can be solved by semidefinite programming.Finally,the effectiveness and superiority of the proposed scheme are verified by simulation results.关键词
卫星通信/智能反射面/物理层安全/鲁棒波束成形/太赫兹频段Key words
satellite communications/intelligent reflecting surface/physical layer security/robust beamforming/terahertz band分类
信息技术与安全科学引用本文复制引用
林敏,李菲,王子宁,赵柏,韩略..智能反射面辅助的太赫兹卫星通信鲁棒安全波束成形算法[J].电子学报,2023,51(10):2715-2723,9.基金项目
重点国际合作项目(No.61720106003) （No.61720106003）
南京邮电大学引进人才科研启动项目(No.NY220111) （No.NY220111）
江苏省研究生科研与实践创新计划项目(No.KYCX22_0959)Key International Cooperation Project(No.61720106003) （No.KYCX22_0959）
Research Start-up Project for Intro-ducing Talents of Nanjing University of Posts and Telecommunications(No.NY220111) （No.NY220111）
Graduate Student Innovation Pro-gram of Jiangsu Province(No.KYCX22_0959) （No.KYCX22_0959）
