IF-over-Fiber Transmission of OFDM Quantum-Noise Randomized PSK Cipher for Physical Layer Encryption of Wireless Signals
IF-over-Fiber Transmission of OFDM Quantum-Noise Randomized PSK Cipher for Physical Layer Encryption of Wireless Signals
复制标题
用于无线信号物理层加密的 OFDM 量子噪声随机 PSK 密码的 IF 光纤传输
DOI：
10.1109/jlt.2021.3119603
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
and Fumio Futami
中科院分区：
文献类型：
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作者：
Ken Tanizawa;and Fumio Futami
提出了一种强度调制/直接检测光纤中频（IFoF）系统，该系统产生微波正交频分复用（OFDM）量子噪声随机相移键控（PSK）密码。该系统直接防止无线窃听没有私钥。我们从理论上分析了该系统，并得出了一个基本的折衷之间的安全性和信号质量在中频（IF）。该系统实现了安全性和信号质量的平衡。我们实验证明4.09-Gbit/s PSK密码产生在3.6 GHz的IF。该密码有216个相位级，100多个相邻信号被量子噪声掩盖。量子噪声信号掩蔽对密码的非法接收施加了不可减少的不确定性，并且窃听者可以达到的符号错误率（SER）接近1。由于量子噪声对真实随机信号的掩蔽不能减少，因此SER的下界是有希望的。在解密之后IF信号的误差矢量幅度被维持在用于无线传输的低值。该密码直接有效地保护个人数据的无线传输免受拦截。
This study proposes an intensity modulation/direct detection intermediate frequency-over-fiber (IFoF) system that generates a microwave orthogonal frequency-division multiplexing (OFDM) quantum-noise randomized phase-shift-keying (PSK) cipher. The system directly prevents wireless interception by an eavesdropper without a private key. We theoretically analyze the system and derive a fundamental tradeoff between the security and signal quality at an intermediate frequency (IF). The system achieves balanced security and signal quality. We experimentally demonstrate 4.09-Gbit/s PSK cipher generation at an IF of 3.6 GHz. The cipher has 216phase levels, and more than 100 adjacent signals are masked by quantum noise. The quantum-noise signal masking imposes irreducible uncertainty on illegitimate reception of the cipher, and a symbol error ratio (SER) that an eavesdropper can reach approaches 1. A lower bound of the SER is promised because truly random signal masking by quantum noise cannot be reduced. The error vector magnitude of the IF signals after decryption is maintained at a low value for wireless transmission. The cipher directly and effectively protects the wireless transmission of personal data from interception.