基于RSSI的改进差分修正加权质心定位算法

Based on RSSI improved differential correction weighted centroid location algorithm

通过信标节点广播信号强度计算未知节点与信标节点的距离,按升序排序后,逐次取三个距离构建相交圆求质心,并将第一个质心作为参考节点计算差分修正因子修正质心,最后,通过加权质心计算实现未知节点的定位。仿真结果表明,该算法能够减少质心计算误差,有效提高定位精度。

With the received strength of the beacon node's broadcast signal,the distance between the unknown nodes and the beacon node is calculated and then sorted in ascending order.Three distances are successively used to construct an intersection circle for searching the centroid,and the first centroid is taken as the reference node to calculate the difference correction factor to correct the centroid.The unknown nodes are located with the weighted centroid algorithm,which is verified by means of simulation.