High-Speed Reconciliation for CVQKD Based on Spatially Coupled LDPC Codes

被引：6

作者：

Jiang, Xue-Qin ^{[1
]}

Yang, Siyuan ^{[1
]}

Huang, Peng ^{[2
]}

Zeng, Guihua ^{[2
]}

机构：

[1] Donghua Univ, Sch Informat Sci & Technol, Shanghai 201620, Peoples R China

[2] Shanghai Jiao Tong Univ, Ctr Quantum Sensing & Informat Proc, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2018年 / 10卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Continuous variable quantum key distribution (CVQKD); reconciliation efficiency; low-density parity-check (LDPC) code; QUANTUM KEY DISTRIBUTION; DISTRIBUTION ROBUST; GAUSSIAN ATTACKS; OPTIMALITY;

D O I：

10.1109/JPHOT.2018.2853736

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The speed of continuous variable quantum key distribution is limited by the reconciliation efficiency and the reconciliation frame error rate (FER) in the reconciliation phase. In this paper, we propose an approach that may increase the reconciliation efficiency and decrease the FER. In detail, to increase the reconciliation efficiency, rather than using the block low-density parity-check (LDPC) codes, such as quasi-cyclic LDPC codes, multiedge-type LDPC codes, and punctured LDPC codes, this paper introduces spatially coupled (SC) LDPC codes to the reconciliation phase. To decrease the FER, we propose a new reconciliation scheme based on the special structure of SC-LDPC codes. To demonstrate the performance of the proposed approach, we construct the SC-LDPC codes based on quasi-cyclic repeat-accumulate codes. It is shown that the proposed scheme leads to higher reconciliation speed than that of the previous reconciliation schemes.

引用

页数：10

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