An Improved Centroid Localization Algorithm for WSN

摘要

Node localization is one of the key technologies in wireless sensor network (WSN). Centroid localization algorithm is totally dependent on the density of the size and distribution of anchor nodes, but they distribute randomly and the density of them is small. In view of the traditional centroid localization algorithm is vulnerable to the influence of network deployment status, and the present situation of low positioning precision, put forward an improved centroid localization algorithm. Firstly, put the thinking of weight to the process of node coordinates’ calculation, introduce the concept of reference anchor nodes. Then design the weighting strategy accordingly, using the weighted results as the unknown nodes’ estimated coordinates, and improve the positioning accuracy through multiple weights. Finally, use simulation experiment to compare the accuracy and stability of the improved algorithm with the classical one. The experimental results show that compared with the traditional algorithm, the improved algorithm’s localization accuracy is higher.