中文摘要：

误码纠错是量子密钥分配后续数据处理过程的关键环节。基于奇偶监督矩阵码检错原理与级联纠错原理，提出了一种高效的级联纠错协议，并对协议的相关参数进行了理论优化分析。根据分析结果，利用仿真数据分别对单次级联纠错的纠错效率和纠错能力进行实验研究，得到不同初始误码率条件下的最优参数选择依据。利用优化的参数，对级联纠错协议的最终密钥生成效率进行了数据仿真分析。结果表明，当初始误码率分别为3、6和10％时，最终的密钥实际生成效率分别达到了77．67、63．21和46．82％。与理论值进行比较显示，本文协议的密钥生成效率接近理论效率的上限值。

英文摘要：

By using the error detecting characteristics of parity check matrix codes and the high correcting capability of cascade error correction algorithm, a high-efficiency cascade error correction protocol is pro- posed. The optimum parameters of the protocol are obtained through theoretical analysis. The error cor- rection efficiency and the capability of a single round error correcting are experimentally studied by using simulation data. Finally, the optimal parameter selection scheme with different initial bit error rates is obtained. Multi-round error correction experiments are carried out to investigate the final key generation efficiency under different initial error rates. The cascade error correction experimental results show that when the initial bit error rates are 3% ,6% and 10% ,the corresponding final key generation efficiencies are 77.67 %, 63.21 % and 46. 82% ,respectively. Experimental and theoretical results comparison shows that the final key generation efficiency of the proposed protocol is close to the upper bound of the theo- retical value.