电子学报2024，Vol.52Issue(5)：1570-1581,12.DOI:10.12263/DZXB.20220725
时间反转OFDM系统中增强安全性能的功率分配与人工噪声设计
Power Allocation and Artificial Noise Design of Time-Reversal OFDM System to Enhance Security Performance
摘要
Abstract
Time reversal technology has natural anti-eavesdropping capability due to its unique spatial and temporal focusing capability.In this paper,an optimization scheme to improve the security performance of time reversal OFDM system is studied.Firstly,the temporal and spatial focusing characteristics of time reversal pre-filtering are applied to im-prove the signal strength of the legitimate receiver relative to the eavesdropper,and then the power of the subcarriers is op-timized to maximize the security rate.In order to further improve the secure capability of the system,the zero-space artifi-cial noise is realized by employing the degree of freedom provided by the circular prefix,which can effectively interfere with the eavesdropper,while does not interfere with the legitimate receiver.Then,the subcarrier power and the covariance matrix of the artificial noise are optimized to maximize the security transmission rate.Simulation results show that the pro-posed scheme can significantly promote the security rate of the system.关键词
物理层安全/正交频分复用/时间反转/功率分配/人工噪声Key words
physical layer security/orthogonal frequency division multiplexing/time reversal/power allocation/arti-ficial noise分类
信息技术与安全科学引用本文复制引用
雷维嘉,毕文佳,雷宏江,唐宏..时间反转OFDM系统中增强安全性能的功率分配与人工噪声设计[J].电子学报,2024,52(5):1570-1581,12.基金项目
国家自然科学基金(No.61971080) National Natural Science Foundation of China(No.61971080) （No.61971080）
