一种面向物联网应用的LDPC译码算法  

A LDPC Decoding Algorithm for Internet of Things Applications

作　　者：杜立婵 王文静 韦冬雪 张青[1] 

机构地区：[1]南宁职业技术学院,广西南宁530008

出　　处：《大众科技》2020年第11期16-18,共3页Popular Science & Technology

基　　金：广西高校中青年教师基础能力提升项目(2017KY1022)。

摘　　要：文章针对物联网通信系统的特点,在基于可靠度的迭代译码算法RBI-MLGD基础上,通过对信道信息引入非均匀量化预处理,提出了一种采用校验和信息作为可靠度的低复杂度LDPC译码算法。该算法对校验节点的校验和成功与否进行区分,设置不同的权重,同时,在译码信息更新时,在初始信道信息基础上进行更新,有效地避免了错误信息的累积,实现了译码性能的提升。通过仿真实验表明,该算法相比RBI-MLGD算法,大约能获得0.30 dB的译码性能增益。According to the characteristics of Internet of things communication system,based on the reliability based iterative decoding algorithm RBI-MLGD,a low complexity LDPC decoding algorithm using parity check information as reliability is proposed by introducing non-uniform quantization preprocessing to channel information.The algorithm distinguishes the success or failure of the parity check node and sets different weights.At the same time,when the decoding information is updated,it updates on the basis of the initial channel information,which effectively avoids the accumulation of error information and improves the decoding performance.The simulation results show that compared with RBI-MLGD algorithm,the proposed algorithm can achieve about 0.30 dB decoding performance gain.

关 键 词：物联网 LDPC码 迭代译码 低复杂度 

分 类 号：TN911.21[电子电信—通信与信息系统]