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arXiv 1804.09360cs.ITmath.IT
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利用多径反射的室内上行光通信定位系统分析

Analysis of Indoor Uplink Optical Communication Positioning System Exploiting Multipath Reflections

Hamid Hosseinianfar, Maite Brandt-Pearce

摘要:

本文介绍了一种用于室内应用的上行光无线定位系统。该技术使用基于室内光无线信道脉冲响应的指纹进行定位。利用视线峰值功率(LOS)、脉冲响应的第二功率峰值(SPP)以及LOS和SPP之间的延迟,我们提出了采用单个固定参考点的定位的概念设计和理论分析的证明,即,天花板上的光电探测器(PD)。添加更多的PD导致更准确的发射机位置估计。作为一个基准,我们提出了不同数量的PD和功能的Cramer-Rao下限(CRLB)的解析表达式。我们进一步提出了封闭形式的分析近似的信道脉冲响应的选择功能。仿真结果表明,在高信噪比条件下,对于典型的室内环境,采用1个PD和4个PD的定位精度分别为25 cm和5 cm.数值结果验证了推导的解析近似密切匹配的模拟。

英文摘要:

In this paper, we introduce an uplink optical wireless positioning system for indoor applications. This technique uses fingerprints based on the indoor optical wireless channel impulse response for localization. Exploiting the line of sight peak power (LOS), the second power peak (SPP) of the impulse response, and the delay between the LOS and SPP, we present a proof of concept design and theoretical analysis for localization employing a single fixed reference point, i.e., a photodetector (PD) on the ceiling. Adding more PDs leads to more accurate transmitter position estimation. As a benchmark, we present analytical expressions of the Cramer-Rao lower bound (CRLB) for different numbers of PDs and features. We further present closed form analytical approximations for the chosen features of the channel impulse response. Simulation results show a root mean square (RMS) positioning accuracy of 25\,cm and 5\,cm for one and four PDs, respectively, for a typical indoor room at high SNR. Numerical results verify that the derived analytic approximations closely match the simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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