| DLE节点定位方法的改进算法 |
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| 引用本文： | 郑大松,蒋挺,周正.DLE节点定位方法的改进算法[J].无线电工程,2008,38(10). |
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| 作者姓名： | 郑大松 蒋挺 周正 |
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| 作者单位： | 北京邮电大学无线网络实验室,北京,100876 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研项目，韩国仁荷大学校科研和教改项目 |
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| 摘 要： | 以DLE定位方法为基础,针对DLE方法中定位精度低、优化算法复杂性问题,提出了基于两跳邻居锚节点的改进算法。改进算法保留了DLE方法中ER算法的简单性,利用传感器网络特性将两跳邻居锚节点引入到ER算法中得出两跳的估计矩形,减小估计矩形的面积,从而提高定位精度。同时,改进算法不仅简化了优化算法,还降低了对锚节点的要求。仿真显示改进算法在锚节点密度较低时能有效提高定位精度,而在锚节点密度较高时定位精度也有所提高。
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| 关 键 词： | 无线传感器网络 定位算法 两跳 锚节点 |
Improvement of DLE Location Method |
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| ZHENG Da-song,JIANG Ting,ZHOU Zheng.Improvement of DLE Location Method[J].Radio Engineering of China,2008,38(10). |
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| Authors: | ZHENG Da-song JIANG Ting ZHOU Zheng |
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| Abstract: | Based on DLE location method,an improved location algorithm is proposed to solve the problem of low location accuracy and complexity of further im provement of DLE method.The proposed algorithm reserves the simplicity of ER algorithm.Making use of property of WSN,it introduces 2-hop neighbor beacon into ER Algorithm to get 2-hop estimative rectangular.This not only simplifies the improved position algorithm;but also lowers capacity of beacon.Simulation shows that the improved location algorithm can enhance location accuracy greatly when the anchor ratio is lower;while when the anchor ratio is higher,it also achieves better location accuracy than DLE. |
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| Keywords: | wireless sensor networks location algorithm 2-Hop beacon |
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