基于多智能超表面的信道空间内生抗干扰方法  

Channel-space endogenous anti-jamming method based on multi-reconfigurable intelligent surface

作　　者：朱勇刚 孙艺夫 姚富强 李程[1] 郭文龙 安康 ZHU Yonggang;SUN Yifu;YAO Fuqiang;LI Cheng;GUO Wenlong;AN Kang(The Sixty-third Research Institute,National University of Defense Technology,Nanjing 210007,China;College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学第六十三研究所,江苏南京210007 [2]国防科技大学电子科学学院,湖南长沙410073

出　　处：《通信学报》2023年第10期13-22,共10页Journal on Communications

基　　金：湖南省研究生科研创新基金资助项目(No.CX20220008)。

摘　　要：针对现有基于干扰认知的无线通信抗干扰方法难以有效应对未知干扰和智能干扰的问题,构建了一种基于多智能超表面的动态异构冗余信道抗干扰模型,为利用信道资源抵抗未知干扰提供基础。在此基础上,提出了一种基于多智能超表面优化与选择的信道空间内生抗干扰方法。所提方法由多智能超表面优化和多智能超表面选择两步组成,首先,对发射波束、智能超表面反射系数和接收波束等参数进行解耦,并在交替优化的框架下推导了各参数的最优闭式解;然后,采用贪婪算法选择最优智能超表面用于通信,以获得最佳抗干扰性能;最后,分析了所提方法的收敛性和计算复杂度。理论分析与仿真结果表明,所提方法能够有效抵抗不确定性干扰的影响。In view of the concern that the traditional anti-jamming method based on jamming recognition is challenging to defend against both the unknown and the intelligent jamming attacks,a dynamic,heterogeneous,and redundant channel-space anti-jamming technique was proposed by adopting multiple reconfigurable intelligent surface(RIS),which facilitated the exploitation of channels’resources for combating with the unknown jamming attacks.To elaborate,a channel-space endogenous anti-jamming method was proposed by leveraging the optimization of both the RIS’coefficients and the multiple RIS’on-off status.Firstly,after decoupling the tightly coupled variables,the optimal closed-form solutions of transmit precoder,RIS’coefficients,and receive decoder could be derived under the alternative optimization framework.Then,the greedy algorithm was adopted to optimize the multiple RIS’on-off status for obtaining better anti-jamming communications,and the convergence and the computation complexity of the proposed method was analyzed.Theoretical analysis and simulation results show that the proposed method can effectively defend against the uncertain jamming attacks.

关 键 词：通信抗干扰 内生抗干扰 信道空间 多智能超表面 

分 类 号：TN92[电子电信—通信与信息系统]