分簇无线传感器网络中根校验全分集LDPC码设计与能效分析  

Full Diversity LDPC Codes Design and Energy Efficiency Analysis for Clustering Wireless Sensor Networks

作　　者：郭锐[1] 刘春于 张华[2] 包建荣[1,3] 姜斌[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018 [2]中国航天电子技术研究院卫星导航系统工程中心,北京100094 [3]东南大学移动通信国家重点实验室,上海200433

出　　处：《电子与信息学报》2015年第7期1580-1585,共6页Journal of Electronics & Information Technology

摘　　要：高效的差错控制编码技术(ECC)可以增强无线传感器网络传输稳定性、网络的能量利用效率。为了充分利用无线传感器网络中蕴含的分集资源应对恶劣信道环境导致的高差错概率,该文研究了基于根校验全分集LDPC码的差错控制编码技术。首先,提出在分簇无线传感器网络中,基于根校验全分集LDPC码的编码方案;其次,设计了适用于所提方案的速率兼容全分集LDPC码字结构。最后,分析了所提编码系统的能效。仿真结果表明,在信道条件较差的环境中(仿真中,信道噪声大于44 10 m W-′),采用该文的编码方案,能够显著提高无线传感器网络的能效。Efficient Error Control Coding （ECC） can be used to enhance the stability and energy efficiency of Wireless Sensor Networks （WSNs）. In order to deal with high bit error probability due to poor channel environment in WSNs, the paper study the error control coding techniques based on full diversity root check Low Density Parity Check （LDPC） codes, which takes advantage of the diversity resources in a wireless sensor network. Firstly, the encoding scheme based on root check full diversity LDPC code is put forward in clustering WSNs, then the diversity gain is analyzed. Secondly, the structure of rate compatible full diversity LDPC codes for the proposed scheme is proposed. Finally, the energy efficiency of the coding WSNs system is given. Simulation results show that the proposed coding scheme can significantly improve the energy efficiency of wireless sensor networks in poor channel conditions environment （In the simulation, channel noise is greater than 4 × 10-4 mW ）.

关 键 词：无线传感器网络 差错控制编码 能效 全分集 低密度奇偶校验 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN911.22[自动化与计算机技术—计算机科学与技术]