A LDPC Decoding Algorithm for the Mobile Environment of High Speed

DU Le; ZHENG Juan-yi; LI Yong; WU Wei

doi:10.13756/j.gtxyj.2017.04.018

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A LDPC Decoding Algorithm for the Mobile Environment of High Speed

- A LDPC Decoding Algorithm for the Mobile Environment of High Speed
- Study on Optical communication Issue 4, Pages: 66-69(2017)
- 作者机构：
  
  西安邮电大学通信与信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2017.04.018
  CLC： TN929.5;TN911.22
- Published：2017，
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[1]杜乐,郑娟毅,李永,吴玮.一种适用于高速移动环境的LDPC译码算法[J].光通信研究,2017(04):66-69.

DU Le, ZHENG Juan-yi, LI Yong, et al. A LDPC Decoding Algorithm for the Mobile Environment of High Speed. [J]. (4):66-69(2017)
[1]杜乐,郑娟毅,李永,吴玮.一种适用于高速移动环境的LDPC译码算法[J].光通信研究,2017(04):66-69. DOI： 10.13756/j.gtxyj.2017.04.018.

DU Le, ZHENG Juan-yi, LI Yong, et al. A LDPC Decoding Algorithm for the Mobile Environment of High Speed. [J]. (4):66-69(2017) DOI： 10.13756/j.gtxyj.2017.04.018.

摘要

为了降低译码算法复杂度、提高信道传送质量

提出一种改进型低密度奇偶校验译码算法。该算法是以多径瑞利衰落信道仿真模型作为高速移动环境下的信道模型

采用有理函数逼近的思想

降低每次循环时校验节点的运算量

从而降低信道译码算法复杂度。在MATLAB环境下对该算法进行了仿真验证

结果表明

相对于对数似然比置信传播译码算法

改进后的低密度奇偶校验译码算法具有较好的译码性能

更能有效降低译码的复杂度。因此改进译码算法应用在高速移动环境中

可以提高信道传输的质量和效率。

Abstract

In order to reduce the complexity of algorithm and improve the quality of channel transmission

a modified LDPC decoding algorithm is proposed in this paper.The algorithm is used in high speed mobile environment where multipath Rayleigh fading channel model is chosen considering the frequency selective deterministic scenario.At the same time

Taylor function approximation is adopted to reduce the amount of inspection node in cycling step

as well as the complexity of decoding.Simulation results show that

compared with BP LLR decoding algorithm

the modified LDPC decoding algorithm has better decoding performance

and can effectively reduce the decoding complexity.Therefore

the modified LDPC decoding algorithm can be applied in the high speed mobile environment

which can improve the quality and efficiency of channel transmission.

关键词

低密度奇偶校验码对数似然比置信传播译码算法改进型BP译码算法复杂度

Keywords

LDPC codeLLR BP decoding algorithmmodified BP decoding algorithmcomplexity

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