摘要：

在无线传感器网络的节点定位过程中,未知节点在x轴和y轴方向上的定位精度较z轴更重要。为此,在RSSI高斯混合(RGM)算法的基础上提出一种基于平面投影的定位算法。通过缩小未知节点空间定位误差区域在xoy平面上的投影面积,提高未知节点在x轴和y轴方向上的定位精度。仿真结果表明,与RGM算法相比,该算法可在不增加时间复杂度及网络通信量的基础上,有效提高节点的x轴和y轴定位精度。

关键词: 无线传感器网络, 节点定位, 平面投影, RSSI高斯混合算法, 投影面积

Abstract:

In the process of Wireless Sensor Network(WSN) node positioning,it is more important to improve the x-axis and y-axis positioning accuracy of an unknown node than z-axis positioning accuracy,so this paper proposes a positioning algorithm based on planar projection on the basis of RSSI Gaussian Mixed(RGM) algorithm.It improves unknown node positioning accuracy on the x-axis and y-axis directions by reducing the projected area of spatial positioning error region.Simulation results show that,compared with RGM algorithm,the proposed algorithm can improve the x-axis and y-axis positioning accuracy without any inscrease in time complexity and network traffic.

Key words: Wireless Sensor Network(WSN), node positioning, planar projection, RSSI Gaussian Mixed(RGM) algorithm, projected area

中图分类号: 

• TP393