Based on DV - Hop of wireless sensor network node localization algorithm improvements

DV-Hop algorithm is a classical range-free localization algorithm used for node locating of wireless sensor network. After analyzing the localization principle and limitation of DV-Hop algorithm, the authors proposed an improved DV-Hop algorithm.The new algorithm used cluster strategy to reduce communication cost and grouping conflict probability in the first stage,and quasi-Newton optimization method was used instead of the least-square method to estimate the position of nodes.Simulation was made by using Matlab7.0,and the results show that the improved DV-Hop algorithm can greatly improve the localization accuracy of the unknown nodes without increasing