| 用于多维数据协调的双边类型LDPC码 |
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| 引用本文： | 马识途,郭大波,孙佳,杨甜甜.用于多维数据协调的双边类型LDPC码[J].量子光学学报,2020,26(1):14-20. |
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| 作者姓名： | 马识途 郭大波 孙佳 杨甜甜 |
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| 作者单位： | 山西大学物理电子工程学院,山西太原030006 |
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| 摘 要： | 在连续变量量子密钥分发(CV-QKD)多维数据协调中,协调效率和密钥传输距离取决于低密度奇偶校验(LDPC)码的纠错性能。在本研究中构造了一种拥有重复累积(RA)码中累积结构的高码率双边类型LDPC码(TET-LDPC),这种双边类型LDPC码在多维数据协调中相比于普通LDPC码可以得到更好的协调性能。经仿真结果可知,在信噪比为1.68 dB时,本文构造的码长为2×10~5的TET-LDPC的协调效率仍然可以达到98.48%,并得到了17.35 kb/s的安全密钥率。
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| 关 键 词： | 量子光学 连续变量量子密钥分发 多维数据协调 双边类型LDPC码 |
Two-Edge Type LDPC Code for Multidimensional Reconciliation |
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| MA Shi-tu,GUO Da-bo,SUN Jia,YANG Tian-tian.Two-Edge Type LDPC Code for Multidimensional Reconciliation[J].Acta Sinica Quantum Optica,2020,26(1):14-20. |
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| Authors: | MA Shi-tu GUO Da-bo SUN Jia YANG Tian-tian |
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| Institution: | (College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China) |
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| Abstract: | In the multidimensional reconciliation process of continuous-variable quantum key distribution,reconciliation efficiency and the key transmission distance rest upor the error correction performance of LDPC code.Herein,a low-rate two-edge type LDPC code(TET-LDPC)with cumulative structure in repeated accumulation(RA)codes is constructed,This two-edge type LDPC code has better performance than canonical LDPC codes in the multidimensional reconciliation.According to the simulation results,when the signal-to-noise ratio is 1.68 dB,the reconciliation efficiency of the constructed TET-LDPC with a code length of 2×10~5 can still reach 98.48%,and the security key rate of 17.35 kb/s is obtained. |
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| Keywords: | quantumoptics quantum key distribution multidimensional reconciliation two-edge type LDPC |
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