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Updated: Mar 15, 2026

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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连续变量QKD启发了经典PAM链接的模拟加密
Ahmad Atieh1, Alexander Raytchev2, Mihail Raytchev2
1Optiwave Systems Inc., Ottawa, ON, K2E 8A7, Canada. ahmad.atieh@optiwave.com.
Scientific reports
|March 14, 2026
概括
我们介绍了一种以量子密钥分布为灵感的方法,以使用高斯模拟器掩盖经典的M级脉冲振幅调制 (M-PAM) 信号. 这种技术通过使信号易受不匹配而提高安全性,从而掩盖有效载荷数据.
科学领域:
- 光学通信是指光学通信.
- 量子信息科学 量子信息科学
- 物理层安全 物理层安全
背景情况:
- 传统的通信系统需要强大的物理层安全方法.
- 现有的方法可能需要专门的通道或复杂的协议.
- 量子密钥分发 (QKD) 提供了高安全性,但可能是复杂的实施.
研究的目的:
- 提出和分析一种新的连续变量 (CV) QKD启发的按键物理层掩盖方法.
- 为了确保没有单独的量子通道的经典M级脉冲振幅调制 (M-PAM) 链接.
- 在理想和模拟链路条件下调查方法的性能.
主要方法:
- 发射器在模拟波形上添加了一个每符号的高斯二次数,由一个被播种的伪随机数生成器 (PRNG) 生成.
- 一个授权的接收器在信号切片之前再生和减去相同的二度序列.
- 分析包括一个理想化的基带模型,附加式白色高斯噪声 (AWGN) 和一个强度调制/直接检测 (IM/DD) 链接的系统级OptiSystem模型,双量化.
主要成果:
- 在理想化的模型中,匹配的种子和参数导致近乎理想的减法取消,匹配标准的AWGN比特错误率 (BER) 对灰色编码的4-PAM的基准.
- 种子或参数的不匹配引入额外的高斯噪声,导致SNR处罚或高BER地板.
- 在OptiSystem模型中,掩盖创建了一个伪星座,内在的算法BER地板,使操作能够在脆弱的FEC边缘模式中进行模糊化.
结论:
- 拟议的密钥物理层掩盖方法通过利用QKD原则有效地保护M-PAM链接.
- 该方案运行在传统光纤上的数据载波信号上,增强实际实施.
- 该方法提供了经典的保护层,通过认证道或独立的QKD系统获取密钥材料.
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