摘要
针对信道不确定性影响、无线信息泄露和障碍物阻挡导致通信质量下降等问题,该文提出一种基于智能反射面(RIS)辅助的多输入单输出(MISO)共生无线电(SR)鲁棒安全资源分配算法。考虑主用户的安全速率约束、次用户的最小速率约束、RIS最小能量收集约束,基于有界信道不确定性,建立了一个联合主被动波束赋形优化的资源分配问题。利用半正定松弛、S-procedure和变量替换法将含参数摄动的非凸问题转化为确定性的凸优化问题,并提出一种基于半正定松弛的鲁棒资源分配算法。仿真结果表明,与现有算法相比,该文算法具有较好的收敛性和鲁棒性。
To resolve the channel uncertainties,wireless information leakage and low communication quality caused by obstacles,a robust secure resource allocation algorithm for a Reconfigurable Intelligent Surface(RIS)aided Multiple Input Single Output(MISO)Symbiotic Radio(SR)network is proposed.Considering the constraint of the secure rate of the primary user,the constraint of the minimum rate of the secondary user and the constraint of the minimum harvested energy of the RIS,a resource allocation problem based on the bounded channel uncertainties is formulated by jointly optimizing the active beamforming vector and the passive beamforming vector.Then,the parameter perturbation included non-convex problem is transformed into a deterministic convex optimization problem via the semidefinite relaxation,S-procedure and the variable substitution methods,and a semidefinite relaxation based robust resource allocation algorithm is proposed.Numerical results verify that the proposed algorithm has better convergence and robustness compared with existing algorithms.
作者
吴翠先
周春宇
徐勇军
陈前斌
WU Cuixian;ZHOU Chunyu;XU Yongjun;CHEN Qianbin(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Research Center of New Digital Intelligent Telecommunication Technology Applications,Chongqing 400065,China;Chongqing Key Laboratory of Mobile Communications Technology,Chongqing 400065,China)
出处
《电子与信息学报》
EI
CAS
CSCD
北大核心
2024年第4期1203-1211,共9页
Journal of Electronics & Information Technology
基金
国家自然科学基金(62271094)
重庆市自然科学基金创新发展联合基金(CSTB2022NSCQ-LZX0009)
重庆市教委科学技术研究项目(KJZD-K202200601)。
关键词
共生无线电
不完美信道状态信息
智能反射面
物理层安全
Symbiotic Radio(SR)
Imperfect channel state information
Reconfigurable Intelligent Surface(RIS)
Physical-layer secrecy
作者简介
吴翠先:女,正高级工程师,硕士生导师,研究方向为共生无线电、资源分配等;周春宇:女,硕士生,研究方向为共生无线电、智能反射面;通讯作者:徐勇军:男,副教授,博士生导师,研究方向为共生无线电、智能反射面、鲁棒资源分配等.xuyj@cqupt.edu.cn;陈前斌:男,教授,博士生导师,研究方向为共生无线电、智能反射面、资源分配等。
