西安电子科技大学学报 ›› 2016, Vol. 43 ›› Issue (3): 6-12.doi: 10.3969/j.issn.1001-2400.2016.03.002

• 研究论文 • 上一篇    下一篇

无线传感器网络码分复用方案性能分析

岳婧;白宝明   

  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)
  • 收稿日期:2015-03-11 出版日期:2016-06-20 发布日期:2016-07-16
  • 通讯作者: 白宝明
  • 作者简介:岳婧(1985- ),女,西安电子科技大学博士研究生,E-mail: jyue@mail.xidian.edu.cn.
  • 基金资助:

    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)

Performance analysis of network code division multiplexing over wireless sensor networks

YUE Jing;BAI Baoming   

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2015-03-11 Online:2016-06-20 Published:2016-07-16
  • Contact: BAI Baoming

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.

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

Abstract:

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 each 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 scheme 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 processing, 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.

Key words: wireless sensor network, network code division multiplexing, soft processing algorithm, log-likelihood ratio, bit error ratio

中图分类号: 

  • TN929.5