Wi-Fi positioning: System considerations and device calibration
Wi-Fi positioning: System considerations and device calibration
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DOI：
10.1109/ipin.2010.5646207
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Thorsten Vaupel;J. Seitz;Frederic Kiefer;S. Haimerl;J. Thielecke
中科院分区：
文献类型：
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作者：
Thorsten Vaupel;J. Seitz;Frederic Kiefer;S. Haimerl;J. Thielecke
由于室内和城市环境中公共和私人接入点的数量越来越多，Wi-Fi定位对于行人导航变得越来越有吸引力。在过去的十年里，已经开发了不同的方法和解决方案。但Wi-Fi硬件和网络协议并不是为定位而设计的。因此，Wi-Fi设备具有不同的硬件特性，导致不同的定位精度。在这篇文章中，我们分析和讨论的Wi-Fi设备的硬件特性，重点放在所谓的Wi-Fi指纹技术定位。该分析是基于使用在消声室中的静态设置，以尽量减少信号反射和噪声收集的测量。不同的移动的设备的测量偏移和实际的轮询间隔等特性已被检查。基于此分析，提出了一种补偿Wi-Fi设备测量偏移的校准方法。在一个典型的办公楼的实验结果，以评估使用校准方法的定位精度的提高。
Due to an increasing number of public and private access points in indoor and urban environments, Wi-Fi positioning becomes more and more attractive for pedestrian navigation. In the last ten years different approaches and solutions have been developed. But Wi-Fi hardware and network protocols have not been designed for positioning. Therefore, Wi-Fi devices have different hardware characteristics that lead to different positioning accuracies. In this article we analyze and discuss hardware characteristics of Wi-Fi devices with a focus on the so called Wi-Fi fingerprinting technique for positioning. The analysis is based on measurements collected using a static setup in an anechoic chamber to minimize signal reflections and noise. Characteristics like measurement offsets and practical polling intervals of different mobile devices have been examined. Based on this analysis a calibration approach to compensate the measurement offsets of Wi-Fi devices is proposed. Experimental results in a typically office building are presented to evaluate the improvement in localization accuracy using the calibration approach.