The effect of human-body shadowing on indoor UWB TOA-based ranging systems

Yakup Kilic, Ameenulla J. Ali, A. Meijerink, M. Bentum, W. Scanlon
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引用次数: 21

Abstract

Because of its superior time resolution, ultra-wide bandwidth (UWB) transmission can be a highly accurate technique for ranging in indoor localization systems. Nevertheless, the presence of obstructions may deteriorate the ranging performance of the system. Indoor environments are often densely populated with people. However, th e effect of the human body presence has been scarcely investigated so far within the UWB ranging context. In this work, we investigate this effect by conducting UWB measurements and analyzing the ranging performance of the system. Two measurement campaigns were performed in the 3-5.5 GHz band, in an anechoic chamber and a laboratory environment. The range estimates were obtained by employing the threshold-based first peak detection technique. Analysis results revealed that the human body significantly attenuates the direct-path signal component. On the other hand, in this study it does not introduce a significant range error since the length difference between the diffracted paths around the body and the direct-path is less than the spatial resolution of the measurement setup.
人体阴影对室内超宽带tob测距系统的影响
超宽带(UWB)传输由于其优越的时间分辨率,可以成为室内定位系统中高精度的测距技术。然而,障碍物的存在可能会降低系统的测距性能。室内环境通常是人口密集的。然而,到目前为止,在超宽带范围内,人体存在的影响几乎没有研究过。在这项工作中,我们通过进行超宽带测量和分析系统的测距性能来研究这种影响。在消声室和实验室环境中分别在3-5.5 GHz频段进行了两次测量。采用基于阈值的第一峰检测技术获得距离估计。分析结果表明,人体对直接路径信号成分有明显的衰减。另一方面,由于物体周围的衍射路径与直接路径之间的长度差小于测量装置的空间分辨率,因此在本研究中没有引入明显的距离误差。
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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