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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/gi-2019-42
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2019-42
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  22 Jun 2020

22 Jun 2020

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This preprint is currently under review for the journal GI.

Research on real-time elimination of UWB radar ranging abnormal value data

Xin Yan, Hui Liu, Guoxuan Xin, Hanbo Huang, Yuxi Jiang, and Ziye Guo Xin Yan et al.
  • School of Electrical and Information Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Abstract. For indoor positioning, ultra-wideband (UWB) radar comes to the forefront due to its strong penetration, anti-jamming, and high precision ranging abilities. However, due to the complex indoor environment and disorder of obstacles, the problems of diffraction, penetration, and ranging instability caused by UWB radar signals also emerge. During the experiment of indoor positioning with UWB radar ranging module P440, it was found that the distance information measured in a short time was unstable, because of the complex indoor environment and unpredictable noise signal. Therefore, the abnormal value migration of the positioning trajectory occurred in real-time positioning. To eliminate this phenomenon and provide more accurate results, the abnormal values need to be removed. It is not difficult to eliminate abnormal value accurately based on a large number of data, but it is still a difficult problem to ensure the stability of the positioning system by using a small amount of measurement data in a short time to eliminate abnormal value in real-time ranging data. Thus, this paper focuses on the experimental analysis of a UWB-based indoor positioning system. To improve the stability of UWB radar ranging data and increase the overall accuracy, this paper studies a large number of UWB radar ranging data by using high-frequency ranging instead of mean value to train estimation model. Based on the Gaussian function outlier detection, abnormal values are eliminated. By using the training distance estimation model and estimating the distance value, the ranging error obtained is nearly 50 % lower than the peak and mean ranging errors in general.

Xin Yan et al.

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Xin Yan et al.

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Latest update: 17 Sep 2020
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Short summary
At present, indoor positioning technology is used in all aspects of life. I study the positioning method of UWB radar network. Because of the interference in the indoor environment, the UWB radar measurement data produce abnormal values. In order to eliminate the outliers, the method of fitting the known true value with the actual measured value is used to obtain the linear relationship between the true value and the measured value, so as to get the unknown true value through the measured value.
At present, indoor positioning technology is used in all aspects of life. I study the...
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