基于单反馈 SLT 码的纠错码与 MP 联合译码

摘要

转移 LT（shifted Luby transform，SLT）码是信源依据接收端的反馈信息进行的 LT（Luby trans-form，LT）编码方法，这种编码方法可以有效地减少解码所需要的数据包个数，由此，本文针对基于单次反馈 SLT码的信道纠错码与信息传递（message propagation，MP）联合译码方法，对原有的转移鲁棒孤立子分布（shifted ro-bust soliton distribution，SRSD）函数进行改进得到适合 MP 联合译码的扩展转移鲁棒孤立子分布（expand shifted robust soliton distribution，ESRSD）函数。将本文提出的 ESRSD 用于 MP 联合译码方案分别与 LT 码、反馈 SRSD MP 联合译码相比，实验结果显示，采用本文提出的 ESRSD 进行编码在 MP 译码所需要数据包的个数最少。%Shifted Luby transform (SLT)codes are the kind of digital fountain codes whose data packets are encoded with the LT codes by the feedback information in order to decrease the number of the encoded packets at the receiver end.This paper proposes an expand shifted robust soliton distribution (ESRSD)function through modified shifted robust soliton distribution (SRSD)for the scheme of message propagation (MP)decoder with error correction codes based on the single feedback information in order to get the encoded packets recovered those error packets at the end.To compare ESRSD with SRSD,experimental results show that the number of packets by using ESRSD is the least,compared with the other methods in LT codes or using the SLT codes with the SRSD.