计算机工程与应用2011，Vol.47Issue(29)：117-120,4.DOI:10.3778/j.issn.1002-8331.2011.29.032
无线传感器网络中的节点自适应周期定位
Self-adaptive periodic localization in wireless sensor networks
摘要
Abstract
Nodes self-localization algorithm is an important part of a wireless sensor network system.It is also the basis on which all the applications of such a system can be implemented.A self-adaptive periodic localization algorithm based on least square estimation uses a periodic localization mechanism to control node locations in a network.Range acquisition tech nique based on the strength of received signals is used to acquire the distance between nodes.Localization period is activat ed till localization is finished.For unknown nodes, the primitive location is acquired through the maximum likelihood estima tion, while the final location is determined by least square estimation.Emulational tests show that such an algorithm can sig nificantly improve the localization rates of unknown nodes in a network,thus effectively inhibiting the spread of range acqui sition errors.Accuracy of nodes localization also increases in the process.关键词
无线传感器网络/节点自定位/周期定位机制/最小二乘估计Key words
wireless sensor networks/nodes self-localization/periodic localization mechanism/least square estimation分类
信息技术与安全科学引用本文复制引用
张晓芳,李国徽,王娟..无线传感器网络中的节点自适应周期定位[J].计算机工程与应用,2011,47(29):117-120,4.基金项目
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60873030) （the National Natural Science Foundation of China under Grant No.60873030）
湖北省自然科学基金(No.2010CDB02301). （No.2010CDB02301）
