一种改进的室内三维定位方法与实验
Improved indoor three dimensional localization algorithm and its experiment
  
DOI:
中文关键词:  室内定位;接收信号强度;到达时间;非视距
英文关键词:indoor localization; received signal strength (RSS); time of arrival (TOA); non line of sight(NLOS)
基金项目:国家自然科学基金(61271335,61605085,61571233,61871232)、南京邮电大学校级科研基金(NY215164)、南京邮电大学教改项目(JGO3318JX65)和江苏省研究生科研与实践创新计划(SJCX19_0275)资助项目
作者单位
王韦刚 南京邮电大学 电子与光学工程学院,江苏南京210023 
田龙彬 南京邮电大学 电子与光学工程学院,江苏南京210023 
张云伟 南京邮电大学 电子与光学工程学院,江苏南京210023 
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中文摘要:
      利用无线传感器网络进行室内定位的过程中,由于信号非视距传播而引起的误差存在,会明显地降低定位精度。为了减小非视距误差对室内定位的影响,文中提出一种新的室内三维定位算法。它将接收信号强度与到达时间结合进行定位,并利用二者测量信息的一致性以减小这种影响,从而提高定位结果的准确性。该算法首先获得节点的测量距离并进行校正,然后计算各测量距离对应的可信因子,最后根据所提出的目标函数求得目标节点的坐标。实验结果表明,所提算法比传统定位算法有更好的定位效果,能显著地提高定位精度。
英文摘要:
      In the indoor localization process,the error caused by the non line of sight propagation of the signal will significantly reduce the localization accuracy.To reduce the impact of non line of sight (NLOS)errors on indoor localization,a new three dimensional indoor localization algorithm is proposed.The algorithm can combine the received signal strength (RSS) with the time of arrival (TOA) technology to be localized,and uses the consistency of the two measurements to reduce the impact,thus improving the accuracy of the localization results.Firstly,the measurement distances of all sensor nodes are obtained and calibrated.Then,the believable factor corresponding to each measurement distance is calculated.Finally,a new objective function is proposed to estimate the coordinates of the target node.Experimental results show that the proposed algorithm has better performance than traditional algorithms.Thus,it can significantly improve the localization accuracy.
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