基于MAX-Log-MAP算法和DSP芯片的Turbo译码器  

Turbo codes decoder based on MAX-Log-MAP algorithm and DSP chip

作　　者：梁广东[1] 高宪军[1] 史彦斌[1] 于海霞[1] 

机构地区：[1]空军航空大学航空电子工程系,长春130022

出　　处：《电子测量技术》2008年第9期129-132,共4页Electronic Measurement Technology

摘　　要：Turbo码又称为并行级联卷积码,其重要的特性就是实现了伪随机编码的思想,但要实现译码低误码率却要以降低整个编译码系统的效率和增加延时为代价。因此,本文通过分析Turbo码迭代译码原理和MAX-Log-MAP算法,根据性能要求和可行性考虑,以DSP芯片ADSP-TS101和MAX-Log-MAP译码算法来实现Turbo译码器的设计,实验结果表明,该系统误码率较低、延时性能符合要求,工作稳定。Turbo codes is also called parallel concatenated convolution code, its characteristic is that it carried out the thinking of the false stochastic coding, if you want to realize low rate of error coding, it will debase the efficiency of the whole coding system and increase delay time. So, this article mainly analyzed iterative decoding principle of turbo codes and the MAX-Log-MAP decoding algorithm, the turbo codes decoder is designed by DSP chip ADSP--TS101 and the MAX-Log-MAP decoding algorithm based on performances and feasibility of system, Experiments showed that the decoder is stable, rate of error coding is low and the delay time is fit.

关 键 词：迭代译码 MAX-LOG-MAP算法 低误码率 译码器 

分 类 号：TN966[电子电信—信号与信息处理]