无线传感器网络差分修正定位算法的改进  

Improvement of difference correction algorithm for wireless sensor network

作　　者：马聪聪[1] 李志为[1] 钟清华[1] 

机构地区：[1]华南师范大学物理与电信工程学院,广东广州510006

出　　处：《现代电子技术》2012年第11期4-7,共4页Modern Electronics Technique

摘　　要：提出了无线传感器网络中一种基于接收信号指示强度的改进差分修正算法,与传统的差分修正算法相比,在该算法中,通过各个信标节点分别作为差分参考节点进行定位,避免了单个差分参考节点对未知节点定位决定权过大。同时,提出加权因子的概念,体现了各差分参考点对定位效果的决定权。实验结果表明,改进的差分修正算法的定位精度和稳定性有明显提高。An improved difference correction algorithm （IDCA） based on received signal strength indication （RSSI） used in wireless sensor network （WSN） is proposed. Compared with the traditional difference correction algorithm （DCA）, IDCA use a method of taking each beacon node as a difference point to amend the unknown nodes, as to avoid a single differential reference node to have a big decision in the localization. And also a concept of weighting factors is proposed, reflecting the effect of differential point to the localization result. The results show that IDCA has more significant localization accuracy and stability than DCA.

关 键 词：无线传感器网络 接收信号指示强度 改进的差分修正算法 加权因子 定位 

分 类 号：TN711-34[电子电信—电路与系统] TP212.9[自动化与计算机技术—检测技术与自动化装置]