无线传感器网络中一种基于三边测量法和质心算法的节点定位算法  

A Node-Localization Algorithm for Wireless Sensor Network Based on Trilateration and Centroid Algorithm

作　　者：高雷[1] 郑相全[1] 张鸿[1] 

机构地区：[1]重庆通信学院,重庆400035

出　　处：《重庆工学院学报（自然科学版）》2009年第7期138-141,共4页Journal of Chongqing Institute of Technology

摘　　要：针对无线传感器网络在节点均匀分布的情况下节点定位精度较差的问题,提出了三边质心定位算法.该算法利用节点均匀分布的先验信息将质心定位思想引入到三边测量法中,通过计算相交圆的公共区域的质心来提高对未知节点位置估算的精度.仿真结果表明,三边质心定位算法与三边测量法相比有效地降低了未知节点的位置误差,提高定位精度.In this paper, trilateration and centroid algorithm, an improved localization algorithm, is proposed in order to improve the precision of node location in Wireless Sensor Network （WSN） when the node distribution is uniform. Centroid localization algorithm is introduced based on the analysis of trilateration in the new algorithm with the help of pesterior information of uniformed distribution of nodes. The precision of node location is improved through rounds. The simulation show that the new algorithm can effectively compared with trilateration. calculation improve the

关 键 词：无线传感器网络 定位 三边测量法 质心算法 

分 类 号：TN915[电子电信—通信与信息系统]