Turbo码实用的Log-MAP译码算法研究

STUDY OF LOG-MAP ALGORITHM SUITABLE FOR IMPLEMENTATION OF TURBO DECODERS

介绍了Turbo码基本结构,阐述了Log-MAP算法的译码机理,在此基础上就简化Log-MAP算法作了探讨,分析了三种简化Log-MAP算法中非线性运算以利于硬件实现的方法:Max-Log-MAP算法,Loo-kup-Log-MAP算法,Linear-Log-MAP算法.最后通过仿真对它们进行了性能上的模拟和比较.

The basic structure of turbo codes and principle of Log-MAP algorithm of the turbo codes are introduced.The problem related to the simplification of the Log-MAP algorithm and three methods of simplified nonlinear operation of Log-MAP algorithm:Max-Log-MAP algorithm,Lookup-Log-MAP algorithm,Linear-Log-MAP algorithm are further discussed and analyzed,Finally,the performances of these methods are compared through the simulation of MATLAB.