基于先验信息的LT码不等差错保护  

Unequal Error Protection Scheme Based on LT codes with Prior Information

作　　者：黄诚 张薇薇 张达 HUANG Cheng;ZHANG Weiwei;ZHANG Da(China Telecom Hubei Branch Company,430023,P.R.China)

机构地区：[1]中国电信湖北分公司,湖北武汉430023

出　　处：《长江信息通信》2023年第4期1-4,共4页Changjiang Information & Communications

摘　　要：文章提出一种结合SPIHT信源编码和基于先验信息冗余保护的LT码不等差错保护方案。通过对译码整体度释放概率的分析证明,先验信息的引入可以提升LT码译码成功率。仿真实验表明,在先验分组比例选取合适的情况下,只增加较少的冗余,可使MIB分组具备更高的译码成功率,得到更多保护。通过图像传输实验,验证了该UEP方案能够实现良好的不等差错保护。A scheme of unequal error protection using LT codes with SPIHT source coding and prior information is proposed.Analysis of overall decoding degree release probability proves that the successful decoding probability can be increased by using prior information.Simulations present that by selecting a proper portion of prior information,the MIB packets can be provided with more protection and get higher successful decoding probability,only with very little increase of redundancy.Image transmission simulation verified that this scheme can provide good unequal error protection perfonnance.

关 键 词：信源信道联合编码 不等差错保护 Luby Transform码 SPIHT 

分 类 号：TN911.2[电子电信—通信与信息系统]