摘要
Turbo码是一种新型差错控制编码,1993年由C.Berrou等人提出。该文在对其原理分析的基础上,介绍了它的几种解码算法。在比较了几种算法的优缺点后,该文对Max-Log-Map这种算法作了改进,乘上一个比例因子,使其性能得到优化。为了能够符合工程上的应用,文章在计算机上使用matlab进行定点仿真,从得出的仿真结果可以看到经过改进的算法,甚至获得了比Log-Map算法更多的编码增益,因此改进算法是有效可行的。
Turbo codes proposed by C. Berrou on ICC＇93 is adopted for the third generation mobile communication system. This paper describes the algorithm of turbo decoding . Based on researching and comparing some algorithms, an improved algorithm is presented. Considering the trade - off of complexity, performance and robust,the new algorithm is considered to be used in practical systems. The result of simulation by matlab also shows that the new algorithm is viable.
出处
《计算机仿真》
CSCD
2005年第8期91-94,共4页
Computer Simulation
关键词
定点仿真
迭代译码
比特错误率
Fixed - point simulation
Iterative decoding
Bit error rate
