Exploring the limits of PDR-based indoor localisation systems under realistic conditions

IF 1.2 Q4 TELECOMMUNICATIONS
Robert Jackermeier, Bernd Ludwig
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引用次数: 5

Abstract

ABSTRACT Pedestrian Dead Reckoning (PDR) plays an important role in many (hybrid) indoor positioning systems since it enables frequent, granular position updates. However, the accumulation of errors creates a need for external error correction. In this work, we explore the limits of PDR under realistic conditions using our graph-based system as an example. For this purpose, we collect sensor data while the user performs an actual navigation task using a navigation application on a smartphone. To assess the localisation performance, we introduce a task-oriented metric based on the idea of landmark navigation: instead of specifying the error metrically, we measure the ability to determine the correct segment of an indoor route, which in turn enables the navigation system to give correct instructions. We conduct offline simulations with the collected data in order to identify situations where position tracking fails and explore different options how to mitigate the issues, for example through detection of special features along the user’s path or through additional sensors. Our results show that the magnetic compass is often unreliable under realistic conditions and that resetting the position at strategically chosen decision points significantly improves positioning accuracy.
探索基于pdr的室内定位系统在现实条件下的局限性
行人航位推算(PDR)在许多(混合)室内定位系统中起着重要作用,因为它可以实现频繁的、颗粒状的位置更新。然而,错误的积累产生了外部错误纠正的需要。在这项工作中,我们以基于图的系统为例,探讨了PDR在现实条件下的局限性。为此,我们在用户使用智能手机上的导航应用程序执行实际导航任务时收集传感器数据。为了评估定位性能,我们引入了一个基于地标导航思想的任务导向度量:我们不是用度量方法指定误差,而是测量确定室内路线正确部分的能力,这反过来又使导航系统能够给出正确的指令。我们利用收集到的数据进行离线模拟,以确定位置跟踪失败的情况,并探索如何缓解问题的不同选择,例如通过检测用户路径上的特殊功能或通过额外的传感器。我们的研究结果表明,在现实条件下,磁罗经往往是不可靠的,在战略选择的决策点重新设置位置可以显著提高定位精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.70
自引率
8.70%
发文量
12
期刊介绍: The aim of this interdisciplinary and international journal is to provide a forum for the exchange of original ideas, techniques, designs and experiences in the rapidly growing field of location based services on networked mobile devices. It is intended to interest those who design, implement and deliver location based services in a wide range of contexts. Published research will span the field from location based computing and next-generation interfaces through telecom location architectures to business models and the social implications of this technology. The diversity of content echoes the extended nature of the chain of players required to make location based services a reality.
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