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基于滑动窗口最长公共子序列WiFi指纹定位算法

DOI: 10.3969/j.issn.1005-3026.2014.10.006, PP. 1390-1393

Keywords: 室内定位,指纹,滑动窗口,时间序列,最长公共子序列

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Abstract:

针对基于WiFi瞬时指纹定位算法中由于RSS信号的时变特性引起的WiFi定位精度差问题,提出了一种基于滑动窗口最长公共子序列指纹定位算法.该算法将时间序列的RSS信号指纹转化为基于滑动窗口的数据模型,增加了指纹特征信息,提高比对准确性.通过计算请求定位数据与样本的最长公共子序列来获得样本点的相似性,解决由于窗口伸缩或滑动窗口中个别采样点无信号引起的比对不准确问题,从而提高了定位的精确性和鲁棒性.实验结果表明,所提定位算法的结果明显优于瞬时指纹定位算法.

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