基于RSSI的改进质心定位算法

为提高无线传感器网络三角形质心定位算法的精度,提出一种基于RSSI的改进质心定位算法.首先,分析传统基于RSSI的三角形质心定位模型,发现单个锚节点测距误差较大会导致盲节点的定位精度受到影响,因此采用4点进行定位来降低单个锚节点权重;其次,改进的质心定位算法选择根轴相交组成的区域作为定位参考区域,将该区域的质心位置作为待测盲节点位置;最后,采用仿真实验对比算法的精确度和稳定性,实验结果表明,相比于传统算法,改进算法定位精度更高,而且定位误差波动更小.

An improved centroid localization algorithm based on RSSI

In order to improve the accuracy of wireless sensor network (WSN) triangle centroid localization algorithm,this paper puts forward an improved centroid localization algorithm based on RSSI.Firstly,by analysising the traditional model of triangle centroid localization based on RSSI,we found that a single anchor nodes ranging error is the conference lead to blind node location accuracy,so,use four fixing points to reduce the single anchor node's weight.secondly,the improved centroid localization algorithm choose the root axis of intersection area as the reference area for positioning,and make the centroid position of the region as the position of a blind node under test.Finally,use the simulation to compare the accuracy and stability.The experimental results show that,compared with the traditional algorithm,the improved centroid localization algorithm has a higher precision,and the positioning error has a smaller fluctuations.