| 摘要: |
| 在现有的基于测距的位置解算算法中,定位精度受测距误差的影响较大.为了提高定位精度,提出了一种基于根心的位置解算算法.该算法中,首先根据位置未知的节点(Target节点)与每三个位置已知的节点(Anchor节点)之间的距离测量值,计算出对应的根心坐标;在根心集合中,滤除误差较大的部分根心;根据剩余根心的坐标及其权重值,计算平均值作为解算结果.仿真结果表明,在相同的误差下,提出的位置解算算法相比于现有的基于测距的位置解算算法有效地降低了解算误差,提高了定位精度. |
| 关键词: 位置解算算法 根心 Anchor节点 Target节点 |
| DOI： |
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| Study on position computing in range-based localization system |
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LIU Zhongling, XU Chaojie, YU Hui
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School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University
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| Abstract: |
| In the existing range-based position computing algorithm,the localization accuracy is greatly influenced by the error of measured distance.In order to improve the localization accuracy,this paper presents an optimized indoor localization algorithm based on radical center.In the algorithm,firstly,calculating the radical center bases on the measured distance between every three anchor nodes and the target node.Then,percentage of the radical centers in the set which have large localization error are filtered out.Finally,computing the average of the remaining radical centers′ coordinates as the result bases on their weight.The result of simulation showed that compared with the existing range-based position computing algorithm,the presented position computing algorithm reduces the localization error and improves the localization accuracy effectively. |
| Key words: position computing algorithm radical center anchor node target node |
