基于RSSI的加权质心定位算法优化研究

Optimization research on weighted centroid localization algorithm based on RSSI

在无线传感器网络(WSNs)中,定位精度和算法收敛速度是节点定位的关键因素.本文提出了一种改进的WCBD(Weighted Centroid Based on Distance)算法,该算法基于接收信号强度指示(RSSI),结合加权质心定位算法,研究参考节点与目标节点之间的距离,然后针对加权质心定位算法中的权重系数选择提出了新的思路,使之提高定位精度.仿真结果表明,与W-Centroid算法和WR-Centroid算法相比,WCBD算法通过误差调整和迭代,有效提高了算法的收敛速度和定位精度.

The positioning accuracy and the convergence speed are the key technologies of node localization in Wireless sensor network（WSNs）.This paper presents an improved WCBD（Weighted Centroid Based on Distance）algorithm,this algorithm is based on received signal strength indication（RSSI）,and the weighted centroid localization algorithm,consider the distance between the reference node and the target node and proposed a new method to the weighted factor in weighted centroid localization algorithm to improve the position accuracy.The simulation results show that comparing with W-Centroid algorithm and WR-Centroid algorithm,WCBD algorithm improves the localization accuracy and the convergence speed through the error adjust and iteration.