关键词: 无线传感器网络 共线度 定位

Abstract:

In many wireless sensor network applications, the physical locations play an important role. Triangulation is utilized in most range-based localization algorithms. When the referenced beacon nodes are collinear or almost collinear, however, an evident localization error would be brought out even if the range measurement error is small.As for this condition, the concept of collinearity is introduced. The location estimation executes only if the collinearity of the referenced beacon nodes is larger than a threshold. The simulation results show that the improvement of the localization error is explicit

Key words: （wireless sensor networks,collinearity,localization）