基于Walfisch-Ikegami模型对节点优化定位的研究
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摘要
通过统计学研究分析,传统的RSSI定位模型精度不高,对此提出了关于Walfisch-Ikegami模型对矿区节点定位的方法,即先对Walfisch-Ikegami模型公式进行简化,预测其路径损耗,并采用自适应遗传算法对其进行优化,求出基站和节点之间的距离。实验仿真分析表明,与传统的RSSI定位模型相比较,Walfisch-Ikegami模型确实提高了移动节点实时定位的精确性,该模型已应用到矿区,有很好的实用价值,取得了较好的效果。
According to the statistical analysis,the traditional RSSI positioning accuracy is not high. So proposes the method with Walfisch-Ikegami model to position mining nodes. First,the Walfisch-Ikegami model calculating formula is simplified,then using the simplified model formula to predict the path loss. And uses the adaptive genetic algorithm to optimize the model formula and gains the distances between base stations and nodes. Compares with the traditional RSSI positioning model,the experiment simulation analyzes show that the Walfisch-Ikegami model not only improves the accuracy of mobile node real-time positioning,but also has good practical value.
According to the statistical analysis,the traditional RSSI positioning accuracy is not high. So proposes the method with Walfisch-Ikegami model to position mining nodes. First,the Walfisch-Ikegami model calculating formula is simplified,then using the simplified model formula to predict the path loss. And uses the adaptive genetic algorithm to optimize the model formula and gains the distances between base stations and nodes. Compares with the traditional RSSI positioning model,the experiment simulation analyzes show that the Walfisch-Ikegami model not only improves the accuracy of mobile node real-time positioning,but also has good practical value.
引文
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[2]黄友锐.智能优化算法及其应用[M].北京:国防工业出版社,2008.
[3]李敏强,寇纪淞.多模态函数优化的协同多群体遗传算法[J].自动化学报,2002,28(4):497-504.
[4]李连,朱爱红.无线传感器网络中的定位技术研究[J].微计算机信息,2005,21(15).
[5]张铃,张拔.遗传算法机理研究[J].软件学报,2002,11(7):945-952.
[6]孙利民,李建中.无线传感器网络[M].北京:清华大学出版社,2005.
[7]于海斌,曾鹏.智能无线传感器网络系统[M].北京:科学出版社,2006.
[8]Channel Models for Fixed Wireless APPlications,Httpa/www.ieee802.org.
[9]Planet Technical Reference Guide,Planet Version 2.8[M8].August 1998.
[10]W.C.YLee,.Mobile Communications Design Fundamentals[M].Joho 1993.