摘要
无线传感器网络中,自身节点定位精度与确定该节点位置的锚节点的几何关系密切相关。分析了TOA算法的定位原理,引入了GDOP描述定位误差与锚节点群几何布局关系,并给出了基于测距的算法中GDOP的计算方法。通过场景分析,结合质心算法原理,提出锚节点群内点定位精度高,仿真验证了结论。
Nodes localization accuracy is closely related with anchor nodes＇ topology in wireless sensor networks. The positioning principle of TOA algorithm is described, and the GDOP is introduced to describe the relationship between localization error and anchor nodes＇ geometry distribution. Then, this paper gives the computing method of GDOP, and advances inside node localization with high accuracy in anchor nodes. The application analysis and simulation test has proved the conclusion.
出处
《通信技术》
2009年第10期63-65,68,共4页
Communications Technology
关键词
待感器网络
时间到达
定位精度
锚节点
网络拓扑
sensor networks
TOA
localization accuracy： anchor node
network topology
