An improved DV-Hop localization algorithm for Wireless Sensor Networks

Based on the characteristics of the DV-Hop, an improved scheme is proposed for this typical range-free localization algorithm in wireless sensor network. It can improve the location accuracy when the sensor nodes distribute non-uniformly. The main principle of the improved scheme is estimating distance of the hops according to the number of neighbours in the same block. In order to reduce the localization error, it uses weighted node distances to calculate the node´s final coordinate. The result of the simulation and experiment show its superiority in locating precision.