摘要
节点定位是无线传感器网络的核心支撑技术之一。针对RSSI方法测距定位误差较大的问题,提出了RSSI测距误差修正的加权质心定位算法。本算法测距阶段采用基于最小二乘测距误差补偿方法对RSSI测距进行修正,以减小测距误差。定位阶段采用改进Euclidean加权质心定位算法,用信标节点对未知节点的不同影响力来确定加权因子,以提高定位精度。仿真表明,该算法精度较常用的加权质心定位算法有了明显提高。
Localization of nodes is a key technology for application of wireless sensor networks.The paper presents algorithm of weighted centroid localization based on RSSI distance measurement error correction.The localization algorithm ranging stage is based on the least square distance measurement error compensation method,to the stage RSSI ranging is revised,to reduce the error of distance measurement.Positioning stage a improvement Euclidean weighted centroid localization algorithm,to prompt localization accuracy.Computer simulation show that,the algorithm’s accuracy has an greatly improvement than the traditional weighted centroid localization algorithm.
作者
刘晓文
关维国
邹德君
武慧君
LIU Xiao-wen,GUAN Wei-guo,ZOU De-jun,WU Hui-jun（Electron ＆ Information EngineeringCollege,Liaoning University of Thchnology,Jinzhou 121001,China）
出处
《电脑知识与技术》
2012年第1期126-129,共4页
Computer Knowledge and Technology
关键词
节点定位
RSSI
加权质心定位算法
node localization
RSSI
weighted centroid localization algorithm
