分布式分级保护LT码  

Distributed Prioritized LT Codes

作　　者：苏伟伟[1] 文红[1] 刘国超[1] 逯全芳[1] 饶倩[1] 

机构地区：[1]电子科技大学 通信抗干扰国家级重点实验室,四川成都610054

出　　处：《通信技术》2013年第10期6-9,共4页Communications Technology

基　　金：国家自然科学基金项目(编号:61032003;61071100和61271172);高等学校博士学科点专项科研基金(编号:20120185110030);国家教育部回国人员科研启动基金联合资助

摘　　要：LT码是喷泉码的一种,它是线型无速率码,在删除信道中性能优越。数据传输中有一些数据相对来说可能更重要,在这样的传输模型中,对于关键信息的保护显的尤为重要。基于此目的提出了一种分布式LT码多信源节点信息的保护措施,分级保护LT码是通过改进每个节点的度为1和2的数据包的原始数据包的选择以提高整个码字的性能,在此基础上引入分布式模型,使得得到的分布式分级保护码字结合了分布式LT码和分级保护LT码的双重优点。LT code, as one of the Fountain codes,is a kind of graph-based linear erasure codes, and can be appliedunderbinary erasure channel with good performance. Some data may be fairly important in data transport model, and also in this method the protection of critical information is particularly critical. This paper presents a distributed LT code with multiple source node information protection measures. Prioritized LT code could improve the degree of each node 1 and 2 of the original data packet of the packet selection, thus to raise the performance of the wholeeodeword. Based on this, the distributed model is introduced, and by combining the dual advantages of distributed LT code and classification prioritized LT code, thedis- tributed prioritized LT code is resulted.

关 键 词：喷泉码 LT码 度分布 分级保护 

分 类 号：TN911.22[电子电信—通信与信息系统]