Research and improvement of DV_HOP localization algorithm in wireless sensor networks

Dv_Hop algorithm is a distributed localization algorithm based on hop count information with low cost, simple implementation. But because of the hop distance error which is large, it will result in a lower positioning accuracy. This paper has carried out the analysis to the DV-Hop algorithm, and the location technology of Dv-Hop localization algorithm gets improved. The improved algorithm revised the network average hop distance estimation range and the unknown node coordinates, the original algorithm and the improved algorithm are simulated. The simulation results show that, in the same network environment, the improved algorithm reduces the location error by distance calculation effectively, the localization accuracy is improved obviously.