Wang Zhiyi, Xiao Yaoqiang, Wang Bingshuai, Wang Sitao, He Jing
Opt Lett. 2022 Oct 15;47(20):5325-5328. doi: 10.1364/OL.474564.
A physical layer enhancement scheme of the W-band millimeter-wave signal based on chaotic grouping and segmentation encryption, 3D Hilbert scrambling, and diffusion is proposed in this paper. Chaotic grouping and segmentation bit-level encryption can enhance the randomness of data and enlarge the key space. 3D Hilbert scrambling and chaotic diffusion are performed in symbol and subcarrier domains. The correlation of data can be effectively reduced after encryption. The analyses show that the key space of the proposed scheme can reach ∼10. The encrypted W-band millimeter-wave signal can be successfully transmitted in the orthogonal frequency division multiplexing (OFDM) radio-over-fiber (RoF) system of 50-km standard single-mode fiber (SSMF) and 3-m wireless channel, and the experimental results demonstrate that the proposed scheme can enhance the security of the system without negatively affecting transmission performance.
本文提出了一种基于混沌分组与分段加密、三维希尔伯特置乱和扩散的W波段毫米波信号物理层增强方案。混沌分组与分段比特级加密可增强数据的随机性并扩大密钥空间。三维希尔伯特置乱和混沌扩散在符号和子载波域中进行。加密后可有效降低数据的相关性。分析表明，该方案的密钥空间可达~10。加密后的W波段毫米波信号能够在50公里标准单模光纤（SSMF）和3米无线信道的正交频分复用（OFDM）光纤无线（RoF）系统中成功传输，实验结果表明，该方案能够增强系统安全性，且不会对传输性能产生负面影响。
