基于DC规划的CR-NOMA系统物理层安全研究  

Research on Physical Layer Security of CR-NOMA System Based on DC Programming

作　　者：张永棠 Zhang Yongtang(Faculty of Megadata and Computing,Guangdong Baiyun University,Guangzhou 510450;Software and Information Service Engineering Research Center of Guangdong Province,Foshan,Guangdong 528225)

机构地区：[1]广东白云学院大数据与计算机学院,广州510450 [2]广东省软件与信息服务工程技术研究中心,广东佛山528225

出　　处：《信息安全研究》2025年第3期275-281,共7页Journal of Information Security Research

基　　金：国家自然科学基金项目(61663029);广东省高校重点领域专项(高端装备制造)项目(2022ZDZX3038)。

摘　　要：针对认知无线电-非正交多址接入系统开放性带来的通信安全问题,提出一种基于DC(difference of convex)规划的CR-NOMA系统物理层安全方案.在非正交多址(non-orthogonal multiple access,NOMA)通信场景下,构建多用户窃听信道模型,推导出CR-NOMA系统的安全和速率表达式;并设计基于DC的载波功率分配算法,求解子信道功率分配的最优解,提高系统子载波的安全性.仿真结果表明,在不增加基站功率情况下,其安全和速率较OFDMA和NOMA分别提升了35%和10%;在相同安全和速率下,用户数量最大可增加200%.验证了该方案能够有效提升系统物理层安全.A physical layer security scheme for CR-NOMA systems based on DC(difference of convex)function planning is proposed to address the communication security issues caused by the openness of CR-NOMA systems.In the NOMA(non-orthogonal multiple access)communication scenario,construct a multi-user eavesdropping channel model derive the security and rate expressions for the CR-NOMA system;And design a DC-based carrier power allocation algorithm to solve the optimal solution for sub-channel power allocation and improve the security of system subcarriers.The simulation results show that without increasing the power of the base station,its SSR is improved by 35%and 10%,respectively,compared to OFDMA and NOMA;Under the same SSR,the maximum number of users can increase by 200%.Verified that the scheme can effectively enhance the physical layer security of the system.

关 键 词：认知无线电网络 物理层安全 非正交多址 信息安全 资源分配 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]