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arXiv 2010.04531eess.SP
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宽带无线网络中多径增强的无设备定位

Multipath-Enhanced Device-Free Localization in Wideband Wireless Networks

Martin Schmidhammer, Christian Gentner, Stephan Sand, Uwe-Carsten Fiebig

摘要:

现有技术的无设备定位系统基于无线网络中的视线链路的接收信号强度测量来推断用户的存在和位置。在这封信中,我们建议利用多路径传播的个人网络节点之间,以提高设备的定位系统。特别是在室内,无线传播信道的特征在于多径传播,即,接收信号包括由于反射和散射而产生的多径分量。给定关于周围环境的先验信息,例如,在楼层平面图中,可以几何地导出多径分量的各个传播路径。本质上,这些传播路径在空间上不同于视线传播路径,并且可以被认为是无线网络中的附加链路。这种扩展的网络确定了新的多径增强的无设备定位系统。使用理论上的定位误差的性能界限,我们表明,包括多径组件到无设备定位系统提高了整体定位性能,并扩展了有效的观察区域显着。

英文摘要:

State-of-the-art device-free localization systems infer presence and location of users based on received signal strength measurements of line-of-sight links in wireless networks. In this letter, we propose to enhance device-free localization systems by exploiting multipath propagation between the individual network nodes. Particularly indoors, wireless propagation channels are characterized by multipath propagation, i.e., received signals comprise multipath components due to reflection and scattering. Given prior information about the surrounding environment, e.g., a floor plan, the individual propagation paths of multipath components can be derived geometrically. Inherently, these propagation paths differ spatially from the line-of-sight propagation path and can be considered as additional links in the wireless network. This extended network determines the novel multipath-enhanced device-free localization system. Using theoretical performance bounds on the localization error, we show that including multipath components into device-free localization systems improves the overall localization performance and extends the effective observation area significantly.

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