分布式不等差错保护LT码  

Distributed Unequal Error Protection LT Code

作　　者：李腾飞[1] 苏伟伟[1] 刘国超[1] 文红[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611731

出　　处：《通信技术》2014年第10期1121-1124,共4页Communications Technology

基　　金：国家自然科学基金项目(No.61032003;No.61271172);高等学校博士学科点专项科研基金(No.20120185110030;No.20130185130002);四川省国际合作研究项目(No.2013HH0005)~~

摘　　要：LT码是喷泉码的一种,由于其优异的性能得到了广泛的应用,其中,分布式LT码在有中继传输的深空通信中特别适用,但是它必须满足各个信源发送的数据信息包长度相等,在实际通信中,每个中继传输的信息数据量不一定相等,数据重要程度也会有所不同,本文针对这个问题设计出了分布式不等差错保护LT码,在编码时通过对信源包的选择策略进行调整实现对重要数据的保护,仿真结果证实了我们提出策略的有效性。LT code, as one of the fountain codes, is now widely used for its excellent performance. Distributed LT code is particular suitable for the deep-space communication with relay transmission, however it must meet the requirement of equal length for data packets of each source. Under actual circumstance, the information data size of each relay transmission differs whereas the importance of data is not the same as well. In the light of this, the distributed unequal error protection LT code is proposed,which could achieve the protection of important data through adjusting the source packet selection strategy in the encoding. Simulation results indicate the effectiveness of this strategy.

关 键 词：LT码 分布式 多信源 不等差错保护 

分 类 号：TN911.22[电子电信—通信与信息系统]