基于改进质心算法的无线传感器网络定位研究  

Research on Wireless Sensor Network Localization Based on Improved Centroid Algorithm

作　　者：李昊 柏植 由佳 郝保明[1] LI Hao;BAI Zhi;YOU Jia;HAO Bao-ming(School of Mechanical and Electrical Engineering,Suzhou University,Suzhou 234000,China)

机构地区：[1]宿州学院机械与电子工程学院,安徽宿州234000

出　　处：《西安文理学院学报（自然科学版）》2022年第3期47-52,共6页Journal of Xi’an University(Natural Science Edition)

基　　金：宿州学院科研平台开放课题项目(2019ykf27;2019ykf10);宿州学院校级教育教学研究重点项目(szxy2020jyxm24)。

摘　　要：为了提高传统质心定位算法定位精度,采用RSSI算法对其进行改进.改进的质心算法首先由未知节点与其临近的三个信标节点所传来的功率强度,推导出未知节点分别与三个信标节点之间的欧氏间距.然后画三个以信标节点作为圆心、间距为半径的圆,产生三个交点,然后利用三边质心法来完成定位.经过MATLAB仿真,结果表明:改进后的加权质心定位算法的定位精度相比较于传统质心定位算法而言有所提升.In order to improve the positioning accuracy of the traditional centroid positioning al⁃gorithm,RSSI algorithm is used to improve it in this paper.Firstly,the Euclidean distance be⁃tween the unknown node and the three beacon nodes is derived from the power intensity trans⁃mitted by the unknown node and its adjacent three beacon nodes.Then,draw three circles with beacon nodes as the center and spacing as the radius to generate three intersections.Finally,the trilateral centroid method is used to complete the positioning.The MATLAB simulation re⁃sults show that the positioning accuracy of the improved weighted centroid positioning algorithm is improved compared with the traditional centroid positioning algorithm.

关 键 词：质心算法 定位 精度 

分 类 号：TH162[机械工程—机械制造及自动化] TP393[自动化与计算机技术—计算机应用技术]