Abstract
In order to reduce the positioning error of the sensor nodes, this paper first analyzes the reasons for the low accuracy of DV - HOP algorithm currently, and then proposes an improved DV - HOP algorithm. The algorithm can be divided into four stages, including data information overlapping stage, average skip distance calculation stage, optimum choice of anchor nodes and redundant node positioning. In the data information overlapping stage, the joint probability density is used for improvement; in the average skip distance calculation, the zero deviation estimation value is introduced; in the optimal selection of anchor nodes, optimal strategy is used; and the nodes are positioned in the redundant node positioning with the method of gradually increasing the skip distance. Simulation results show that the algorithm of this paper can effectively reduce the position error in calculation and improve the positioning accuracy.
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