DV-Hop Localization Algorithm Based on Estimate of Average Hop Distance and Correction in Position

Conventional DV-Hop localization algorithm considers only the average hop distance estimated by the closest anchor node.so it will lead to larger error in position.In response to this problem,an improved DV-Hop localization algorithm based on estimate of average hop distance and correction in position is brought forward.When computing distances between an unknown node and all anchor nodes,it can obtain different distances taking into account the difference in distance and hops between the closest anchor node and other anchor nodes.The average hop distance estimated in this way is closer to the actual distance.In addition,it corrects the results of the initial positioning in circle.The simulation results show that the improved algorithm can improve the positioning accuracy effectively without increasing hardware consumption in nodes comparing with conventional DV-Hop algorithm.Furthermore,it is simple and needs small amount of calculation.So it is a practical program for nodes localization in wireless sensor networks.