Tang Rong, Ren Jianxin, Fang Juncheng, Mao Yaya, Han Yang, Shen Jiajia, Zhong Qing, Wu Xiangyu, Tian Feng, Liu Bo
Opt Express. 2021 Jul 19;29(15):24561-24575. doi: 10.1364/OE.433691.
A parallel bit-interleaved filter-bank multicarrier/offset quadrature amplitude modulation (FBMC/OQAM) security strategy based on four-dimensional chaos is proposed in this paper. After the QAM constellation point distribution is disturbed, the modulated FBMC bits and symbols are interleaved and encrypted to realize the improvement of the FBMC/OQAM system physical layer security performance. The chaotic sequence generated by the four-dimensional hyperchaotic system is optimized and calculated to control the disturbance process, which enhances the performance of the system against illegal malicious attacks. The parallel encryption scheme proposed in this scheme increases the encryption efficiency by 1.43 times; can provide a keyspace of 10 size, which effectively resists brute force attacks; and improves the physical layer security of the system. The proposed FBMC/OQAM parallel bit interleaved encryption scheme using a 5 km weakly coupled four-mode fiber achieves a 3×10 Gb/s multiple-input multiple-output-free transmission. The experimental results show that this scheme can effectively improve the security performance of the system, and combines the few-mode multiplexing technology with advanced modulation. It is a candidate for the future large-capacity and high-security optical transmission system.
本文提出了一种基于四维混沌的并行比特交织滤波器组多载波/偏移正交幅度调制（FBMC/OQAM）安全策略。在对QAM星座点分布进行干扰后，对调制后的FBMC比特和符号进行交织和加密，以实现FBMC/OQAM系统物理层安全性能的提升。对四维超混沌系统生成的混沌序列进行优化计算，以控制干扰过程，增强系统抵御非法恶意攻击的性能。该方案中提出的并行加密方案使加密效率提高了1.43倍；可提供大小为10的密钥空间，有效抵御暴力攻击；并提高了系统的物理层安全性。所提出的使用5 km弱耦合四模光纤的FBMC/OQAM并行比特交织加密方案实现了3×10 Gb/s的无多输入多输出传输。实验结果表明，该方案能有效提高系统的安全性能，将少模复用技术与先进调制相结合。它是未来大容量、高安全性光传输系统的一个候选方案。
