并行级联分组码基于相关运算的叠加反馈译码  

A Superposition Feedback Decoding Algorithm for Parallel Concatenated Block Code Based on Correlation Operation

作　　者：彭万权[1] 

机构地区：[1]重庆工程职业技术学院,重庆400037

出　　处：《计算机仿真》2009年第6期348-351,共4页Computer Simulation

摘　　要：并行级联分组码和串行级联分组码均可实现基于LLR计算的Turbo迭代译码,但前者具有更高的码率。将接收信息与子译码器的输出软信息进行线性叠加反馈能在省去繁琐的LLR计算的情况下实现并行级联分组码的Turbo迭代译码,仅通过对译码器的输出进行简单的相关运算以及对Chase2译码算法进行适当的改进便可获得接近LLR算法的译码性能。仿真研究验证了算法的有效性。Both the parallel concatenated block code and the serial concatenated block code can be decoded by turbo iterative decoding based on LLR, and the code rate of the former is higher than that of the latter. This paper superposed the received information with the soft information of the sub - decoder output and carried out simple correlation operation with the output of the decoder, so avoided complicated LLR to carry out turbo iterative decoding. At the same time, the Chase2 decoding algorithm was modified in this paper and the results of simulations have confirmed that its performance approached to that of the LLR.

关 键 词：并行级联分组码 迭代译码 相关运算 线性叠加 

分 类 号：TN911.22[电子电信—通信与信息系统]