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总览 评价 杜锋 1, , 赵方 1,* , 罗海勇 2, ( 1、 北京邮电大学软件学院,北京 100876; 2、 中国科学院计算机研究所,100190; ) 摘要: 室内定位技术用于当用户处在室内建筑时,实时获得用户的物理位置和基于位置的服务。室内地磁信号由于特征明显
杜锋1,, 赵方1,*, 罗海勇2,
(
1、北京邮电大学软件学院,北京 100876; 2、中国科学院计算机研究所,100190; )
摘要:
室内定位技术用于当用户处在室内建筑时,实时获得用户的物理位置和基于位置的服务。室内地磁信号由于特征明显并且信号稳定,用于做室内定位时表现出良好的精确性和鲁棒性,成为了室内定位技术的一个选择。室内地磁定位技术分为离线指纹训练和在线定位两个阶段。传统指纹训练一般由专业技术人员在室内采集大量地磁指纹数据,采集和维护开销较大,阻碍了定位技术的应用推广。论文设计实现了一种基于众包的低开销室内地磁指纹采集系统。该系统首先由众多普通用户分布式参与指纹采集,然后采用聚类算法,对不同用户采集的地磁轨迹数据进行融合,从而构建出地磁指纹和地理空间之间的准确映射关系。实验结果表明,使用基于众包的室内地磁指纹采集方法,可获得与传统专业地磁指纹采集相似的定位精度。?????
关键词:
地磁定位;众包;AP算法;DTW算法
DU Feng1,, ZHAO Fang1,*, LUO Haiyong2,
(
1、College of Software Engineering, Being University of Posts and Telecommunications, Beijing,100876; 2、Institute of Computing Technology, Chinese Academy of Sciences,100190; )
Abstract:
The indoor localization technology is used to get the real-time physical position and to provide the location based service while user is in the indoor scenarioes. The geomagnetic indoor localization becomes a good alternative because of the differentiable and stable signal characteristics, which can obtain high localization accuracy and robustness.The geomagnetic localization consists of the offline training phase and online positioning phase. On the training phase, large number of geomagnetic data need to be collected for geomagnetic positionging fingerprint database construction and update, which exerts extensive cost for the traditional professional fingerprint collection method. To reduce acquisition costs, a geomagnetic fingerprint collect system based on the crowdsourcing method was proposed. This System help establisheding correspondence between geomagnetic fingerprints space and physical space after geomagnetic fingerprint collecting, fingerpring clustering and geomagetic fusioning. The experimental results show that we can get a similary accuracy of positioning using the crowd-soucing geomagenetic data which is compared with the traditional fingerprint collecting.
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