LDPC编码在无线传感器网络中的应用  

Application of LDPC coding in WSNs

作　　者：杨志良[1] 李晋华[1] 

机构地区：[1]中北大学信息与通信工程学院,山西太原030051

出　　处：《传感器与微系统》2013年第10期139-141,共3页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(61071193)

摘　　要：无线传感器网络(WSNs)通信环境复杂,为提高WSNs节点间通信的抗干扰性能,将低密度奇偶校验(LDPC)码编译码技术应用于WSNs节点的设计中。设计了加入编码后WSNs节点基本结构和基本原则,据此设计了LDPC编码校验矩阵H,比较了3种BP译码算法,不同码长和不同译码迭代次数的误码率曲线。通过比较采用最小和译码算法解码,码长选用为128 bits,码率为1/2,译码迭代次数为30。仿真结果证明:加入LDPC编码后,虽然增加了电路的复杂性,但大大提高了传感器节点间通信的可靠性和WSNs数据通信的抗干扰性能。Because the condition of communication in wireless sensor networks （WSNs）is complicated, in order to improve anti-interference performance between sensor nodes, adopt LDPC code technology in design of WSNs nodes. First design the basic structure and rules of WSNs node when using LDPC, and then design LDPC check matrix H according to this, compare three kinds of BP decoding algorithm, different code length and error rate curve of different iteration numbers. Through comparision of using the min-sum algorithm for decoding, code length is 128 bits and code rate is 1/2, the iteration the number is 30. The simulation results prove that after adding LDPC coding, although increase circuit complexity, but greatly improves reliability of communication between sensor nodes.and anti-interference nerformanee of data communication in WSNs.

关 键 词：无线传感器网络 低密度奇偶校验 置信传播算法 误码率 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]