基于共线度的传感器网络节点定位性能分析

Localization performance analysis based on degree of collinearity for wireless sensor networks

节点定位是无线传感器网络一个很重要的研究内容。提出一种新参数——共线度来分析一组三个参考节点的不同部署对传感器网络节点定位性能的影响,同时从理论上提出并证明了该参数对定位性能影响程度的两个定理。仿真实验显示:该参数有助于分析传感器网络节点的定位性能,并为选择良好的参考节点组合来进行有效定位提供了一个可行的参考指标。

The localization problem of sensor nodes is an important research issue in wireless sensor networks （WSNs）. This paper proposes a new parameter called degree of collinearity （DC） to analyze the localization performance with respect to the different placement of the terns of reference nodes （whose positions are known）, proposes and proves two theorems of reference nodes topology based on the analysis of the localization error. Extensive simulation experiments show that the parameter is helpful to analyze the localization performance of nodes in WSNs, and provides a feasible reference index for selecting a good tern of reference nodes to reduce the localization error.