一种具有不等差错保护能力的Turbo预编码方案  

A Precoded Turbo Coding Scheme With Unequal Error Protection Ability

作　　者：张卫党[1] 杨程程[1] 

机构地区：[1]郑州大学信息工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2013年第2期67-70,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省自然科学基金资助项目(2010B510020);郑州大学研究生科学研究基金资助项目(11L00504);郑州大学校研究生教育支持基金资助项目

摘　　要：通过Turbo预编码思想与不等差错保护技术的结合,以达到对不同重要性信息的不等保护.所设计的Turbo预编码方案,以简单的线性分组码为外码(预编码器),以Turbo码为内码构成的串行级联码.针对这种预编码方案研究了新的外码SISO迭代译码算法.最后,对1/3码率的Turbo预编码系统按外码译码方式的不同进行了仿真,并与1/2、1/3码率的Turbo码作性能比较.结果表明,本方案不仅使Turbo码的性能得到了有效的提高,也实现了对不同信息的不等差错保护.而且,编译码思路简单可行.The combination of precoded Tarbo thoughts and unequal error protection techndogy, helps to acheive unequal protection for information with different importance. The precoded turbo coding scheme de- signed in this paper consists of the simple linear block code as the outer code （precoder） and the Turbo code as the inner code. They make up the serial concatenated codes. According to this precoding scheme, this pa- per researches a new outer code SISO iterative decoding algorithm. At last, 1/3 rate of the precoded Turbo system has been simulated according to the decoding algorithms of outer code, and has been compared with the performance of 1/2 and 1/3 rate Turbo code. The results show that this scheme not only improves the perform- ance of Turbo code effectively, it also realizes unequal error protection for different informations. And the cod- ing and decoding ideas are simple and feasible.

关 键 词：TURBO码 不等差错保护 预编码 SISO迭代译码算法 

分 类 号：TN911.22[电子电信—通信与信息系统]