无线传感器网络的DV-Hop节点定位算法改进研究

his paper introduced the localization principle and the error source of DV-Hop algorithm in the wireless sensor networks To overcome the disadvantage of DV-Hop algorithm when it was used to compute the distance of unknown nodes and beacon nodes, worked out an improved algorithm which was based on analyzing the error between estimated distance and real distance of beacon nodes. The proposed algorithm uses Least square method to correct the average distance per pop. Then based on the DV-Hop ,each node obtains the distances and pops. By trilateration or maximum likelihood estimation unknown nodes can calculate their location. The experimental results show that the location accuracy of the proposed algorithm outweighs significantly the DV-Hop algorithm.