数据采集与处理Issue(3)：591-598,8.DOI:10.16337/j.1004-9037.2015.03.015
改进的块复制不等差错保护喷泉码
Improvement of Unequal Error Protected Fountain Codes Based on Block Duplication
摘要
Abstract
In several applications such as multimedia transmission and deep space communications ,some data may need more protection than the rest because of the different importance of the data .Such applica‐tions raise the need for fountain codes with unequal error protection (UEP) .The operation mechanism of the unequal error protected fountain codes based on block duplication is analyzed ,and an improved selec‐tion strategy of information symbols is proposed to improve the protection of more important bits (MIB) in local area .Degree 1 encoded symbols are selected from MIB and a certain number of degree 2 encoded symbols are chosen from MIB and less important bits (LIB) ,respectively .Simulation results show that compared with the existing method ,the proposed scheme perform better on decoding MIB without reduc‐ing the decoding of LIB while reserving a better unequal recovery time (URT ) property .关键词
喷泉码/LT 码/不等差错保护/块复制Key words
fountain codes/LT codes/unequal error protection/block duplication分类
信息技术与安全科学引用本文复制引用
邓在辉,同小军,甘良才..改进的块复制不等差错保护喷泉码[J].数据采集与处理,2015,(3):591-598,8.基金项目
国家自然科学基金（61072041）资助项目。 （）
