Quantum Noise-Assisted Coherent Radio-over-Fiber Cipher System for Secure Optical Fronthaul and Microwave Wireless Links
Quantum Noise-Assisted Coherent Radio-over-Fiber Cipher System for Secure Optical Fronthaul and Microwave Wireless Links
复制标题
用于安全光前传和微波无线链路的量子噪声辅助相干光纤无线电密码系统
DOI：
10.1109/jlt.2020.2987213
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
and Fumio Futami
中科院分区：
文献类型：
--
作者：
Ken Tanizawa;and Fumio Futami
本文报道了一种对称密钥直接数据加密技术，该技术直接保护了相干模拟光纤无线电（RoF）系统中物理层对光和微波信号的拦截。通过量子（弹）噪声掩盖信号实现保密。加密的量子噪声掩蔽是通过将数据转换成光学频率的极高阶信号来实现的。信号通过光前传链路传输后，使用本地振荡器进行无线传输，通过光外差过程将加密信号的频率转移到微波频率。量子噪声掩蔽的效果在外差过程中自然、无缝地保持。实验证明了在30ghz无线频段使用量子噪声掩蔽的12gbit /s相干RoF密码系统。在光前传和微波无线链路中，可以同时实现足够的信号质量和高安全性，并具有足够的量子噪声掩蔽。
This article reports on a symmetric-key direct-data encryption technique that directly protects the interception of optical and microwave signals from physical layer in a coherent analog radio-over-fiber (RoF) system. Secrecy is realized by signal masking by quantum (shot) noise. The quantum noise masking for the encryption is achieved by converting data into extremely high-order signals at an optical frequency. After signal transmission over an optical fronthaul link, the frequency of the encrypted signal is shifted to a microwave frequency via an optical heterodyne process using a local oscillator for wireless transmission. The effect of the quantum noise masking is naturally and seamlessly kept in the heterodyne process. We experimentally demonstrate 12 Gbit/s coherent RoF cipher systems utilizing the quantum noise masking for a 30 GHz wireless band. Adequate signal quality and high security against interception with sufficient quantum noise masking are simultaneously achieved in the optical fronthaul and microwave wireless links.