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arXiv 2207.08503eess.SP
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无线电定位系统中的自动定位:贝叶斯方法

Auto-Positioning in Radio-based Localization Systems: A Bayesian Approach

Andrea Jung, Paul Schwarzbach, Oliver Michler

摘要:

基于无线电的定位系统的应用日益增加。鉴于物联网和位置感知通信系统的传播,对本地化架构和可能用例的数量的需求稳步增加。虽然传统的基于无线电的定位是通过利用固定的节点,其位置是绝对参考,协作自动定位方法的目的是估计位置信息,没有任何先验知识的节点分布。自动定位的使用减少了定位系统的安装工作,因此允许它们在市场范围内传播。由于这种情况下的观测和位置信息是相关的,因此需要考虑所有节点的不确定性。在本文中,我们提出了一种基于多维直方图滤波器的离散贝叶斯方法来解决鲁棒自动定位的任务,允许传播历史位置和估计位置的不确定性,以及降低对观测可用性的要求相比,传统的封闭形式的方法。所提出的方法进行了验证,利用不同的多径,离群值和故障损坏的测距测量在静态环境中,在那里我们获得至少58%的定位精度相比,基线封闭形式的自动定位方法。

英文摘要:

The application of radio-based positioning systems is ever increasing. In light of the dissemination of the Internet of Things and location-aware communication systems, the demands on localization architectures and amount of possible use cases steadily increases. While traditional radio-based localization is performed by utilizing stationary nodes, whose positions are absolutely referenced, collaborative auto-positioning methods aim to estimate location information without any a-priori knowledge of the node distribution. The usage of auto-positioning decreases the installation efforts of localization systems and therefore allows their market-wide dissemination. Since observations and position information in this scenario are correlated, the uncertainties of all nodes need to be considered. In this paper we propose a discrete Bayesian method based on a multi-dimensional histogram filter to solve the task of robust auto-positioning, allowing to propagate historical positions and estimated position uncertainties, as well as lowering the demands on observation availability when compared to conventional closed-form approaches. The proposed method is validated utilizing different multipath-, outlier and failure-corrupted ranging measurements in a static environment, where we obtain at least 58% higher positioning accuracy compared to a baseline closed-form auto-positioning approach.

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