基于级联 Polar 码和多级译码方法的
连续变量 QKD 数据协商协议

doi:10.3969/j.issn.1007-5461.2022.03.012

量子电子学报 ›› 2022, Vol. 39 ›› Issue (3): 411-417.doi: 10.3969/j.issn.1007-5461.2022.03.012

基于级联 Polar 码和多级译码方法的连续变量 QKD 数据协商协议

周晓东1, 王晟1, 张天兵2, 胡宗富1, 冯宝2;3∗, 肖红4

( 1 国网福建省电力有限公司信息通信分公司, 福建福州350003; 2 南京南瑞信息通信科技有限公司, 江苏南京211000; 3 南京南瑞国盾量子技术有限公司, 江苏南京211000; 4 南京邮电大学通信与信息工程学院, 江苏南京210003 )

收稿日期:2020-10-10 修回日期:2021-01-04 出版日期:2022-05-28 发布日期:2022-05-28
通讯作者: E-mail: nrgd_lw@163.com E-mail:nrgd_lw@163.com
作者简介:周晓东( 1976 - ), 福建福州人, 高级工程师, 主要从事电力通信方面的研究。E-mail: 13905016462@163.com
基金资助:
Supported by State Grid Fujian Electric Power Co., Ltd. Technology Project (国网福建省电力有限公司科技项目, 52130M19000Y)

Continuous-variable QKD data reconciliation protocol based on concatenated Polar coding and multistage decoding

ZHOU Xiaodong1, WANG Sheng1, ZHANG Tianbing2, HU Zongfu1, FENG Bao2;3∗, XIAO Hong4

( 1 Information and Communication Branch of State Grid Fujian Electric Power Co. Ltd., Fuzhou 350003, China; 2 NARI Information Communication Technology Co. Ltd., Nanjing 211000, China; 3 NRGD Quantum Technology Co. Ltd., Nanjing 211000, China; 4 College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China )

Received:2020-10-10 Revised:2021-01-04 Published:2022-05-28 Online:2022-05-28

摘要/Abstract

摘要： 数据协商是量子密钥分发协议的重要步骤之一，其协商效率直接影响了量子密钥分发的密钥率。提出一种基于级联Polar码和多级译码方法的连续变量量子密钥分发数据协商协议。所提协议在多级编码调制系统的基础上，利用纠错性能更好的级联Polar码作为分量码应用到多级译码中。仿真分析了协议的性能，结果表明所提协议的协商效率被极大地提高，同时密钥的比特错误率也极大地降低，当信噪比等于0.5dB时该协议的误比特率小于10^-3，研究结果对连续变量量子密钥分发的实用具有重要的价值。

关键词: 量子光学, 量子密钥分发, 数据协商, 级联Polar 码, 多级译码

Abstract: Data reconciliation protocol is one of the important steps in quantum key distribution (QKD), and its efficiency directly affects the key rate of QKD. Therefore, a continuous variable QKD data reconciliation protocol based on concatenated polar coding and multistage decoding is proposed. Based on the multistage coded modulation system, the proposed protocol uses the concatenated Polar codes with better error correction performance as component codes in the multistage decoding. The performance of the protocol is analyzed by simulation. The simulation results show that the reconciliation efficiency of the proposed protocol is greatly improved, while the bit error rate of the key decreases greatly at the same time. When the signal-to-noise ratio is equal to 0.5 dB, the bit error rate of the protocol is less than 10􀀀3. This protocol is of great value to the application of continuous-variable QKD.

Key words: quantum optics, quantum key distribution, data reconciliation, concatenated Polar coding, multistage decoding

中图分类号:

O431.2

周晓东, 王晟, 张天兵, 胡宗富, 冯宝, ∗, 肖红. 基于级联 Polar 码和多级译码方法的连续变量 QKD 数据协商协议[J]. 量子电子学报, 2022, 39(3): 411-417.

Bao Feng. Continuous-variable QKD data reconciliation protocol based on concatenated Polar coding and multistage decoding[J]. Chinese Journal of Quantum Electronics, 2022, 39(3): 411-417.

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基于级联 Polar 码和多级译码方法的连续变量 QKD 数据协商协议

Continuous-variable QKD data reconciliation protocol based on concatenated Polar coding and multistage decoding

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基于级联 Polar 码和多级译码方法的 连续变量 QKD 数据协商协议

Continuous-variable QKD data reconciliation protocol based on concatenated Polar coding and multistage decoding

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基于级联 Polar 码和多级译码方法的连续变量 QKD 数据协商协议