| 基于RSSI的无线传感器网络定位算法研究 |
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| 作者单位： | 云南大学 云南省电子计算中心 |
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| 基金项目： | 国家自然科学基金资助项目(61063010).
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| 摘 要： | Ecolocation是一种基于RSSI的定位技术，算法中基于约束表的构造存在不完善之处.针对定位算法存在的误差问题从2个方面进行如下改进：首先规范构造约束表的数据源，统一采用RSSI值；其次统一序列排序比较对象，以未知节点的源数据为共同的比较基准.给出了改进算法的实现流程，并对算法的性能进行了仿真研究.仿真结果表明，改进算法的时间略有增加，而定位精度得到明显提高，随着锚节点数的增加，定位误差明显减小.
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| 关 键 词： | RSSI WSNs 定位序列 约束方法 |
Study of localization algorithm based on RSSI for WSNs |
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| Institution: | Electronic Computing Center of Yunnan Province,Yunnan University |
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| Abstract: | Ecolocation is a localization technique based on RSSI.However,the construction of constraint table of the algorithm is not perfect.Two approaches are proposed to improve the localization performance of Ecolocation.Firstly,the data in the constraint tables are unified by RSSI values.Secondly,the comparative sources of sequence order are unified by the data of unknown nodes.The procedure of the improved algorithm is shown.Simulation results indicate that location accuracy is distinctly improved with slightly increasing of the time for improved algorithm.If the proportion of anchor nodes increases,the localization error of the improved algorithm will decrease obviously. |
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| Keywords: | RSSI WSNs localization sequences constraint-based approach |
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