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《Chinese Journal of Scientific Instrument》 2008-02
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Stepwise refinement localization algorithm for wireless sensor network

Xu Lei,Shi Weiren(Department of Automation,Chongqing University,Chongqing 400044,China)  
Localization algorithms in wireless sensor network need to consider combination of location accuracy,cost of network construction and costs of communication and computation due to its restricted resource.A stepwise refinement localization algorithm is proposed with a moderate number of anchor nodes in this paper.Based on the location information of anchor nodes,the rough location of each node is gained in the first phase,while the location accuracy would be iteratively refined using weighted multilateration in the second phase.Orphan nodes that can not be localized are disposed in these two phases in order to eliminate their influence on the location accuracy.The algorithm can be implemented easily.Simulation results show that it can reach a relative high location accuracy level with a moderate number of anchor nodes and costs modestly.
【Fund】: 国家教育部博士点基金(2006611010)资助项目
【CateGory Index】: TP212.9;TN929.5
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