无线传感器网络码分复用方案性能分析  

Performance analysis of network code division multiplexing over wireless sensor networks

作　　者：岳婧[1] 白宝明[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2016年第3期6-12,共7页Journal of Xidian University

基　　金：国家重点基础研究发展计划("973"计划)资助项目(2012CB316100);国家自然科学基金资助项目(61372074)

摘　　要：在无线传感器网络中,多组信源节点通过同一中继网络协助与各自目的节点进行通信.为了消除无线传感器网络目的端多个传输会话间的干扰,提出了一种并行会话模型下的网络码分复用方案并分析了方案的性能.利用低密度生成矩阵码的性质,计算等效接收向量.通过对方案软处理算法进行分析,明确编码设计准则.仿真结果表明,使用编码设计准则,可以有效地控制并行会话方案与串行会话方案间的误比特率性能差距.In a wireless sensor network （WSN）, multiple groups of source nodes communicate with their respective destination nodes with the help of a common relay network. To remove the inter-session interference among multiple transmission sessions at eaeh destination in a wireless sensor network, a network code division multiplexing （NCDM） scheme is proposed for the parallel session model. The fundamental of the NCDM seheme takes advantage of the property of the low-density generator matrix （LDGM） code to calculate the equivalent received signal. Then the NCDM scheme is analyzed. Based on the analysis of the soft proeessing, a new code design criterion for the construction of the generator matrix is developed. Simulation results show that by following the proposed code design criterion, the bit error ratio （BER） performance gap between the scheme we studied and the serial session scheme can be managed effectively.

关 键 词：无线传感器网络 网络码分复用 软处理算法 对数似然比 误比特率 

分 类 号：TN919.2[电子电信—通信与信息系统]