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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。
In wireless sensor networks, the positioning accuracy of the node itself is closely related to the geometry of the anchor node that determines the position of the node. The location principle of TOA algorithm is analyzed. The relationship between positioning errors of GDOP and the geometric layout of anchor nodes is introduced. The calculation method of GDOP in the algorithm based on ranging is given. Through the scene analysis and the principle of centroid algorithm, it is put forward that the positioning accuracy of anchor point group is high, and the conclusion is validated by simulation.