基于光学信号的 AoA 和 PoA 对室内定位系统多径效应的特性分析。

Characterization of Multipath Effects in Indoor Positioning Systems by AoA and PoA Based on Optical Signals.

机构信息

Department of Electronics, University of Alcalá, Alcalá de Henares, 28801 Madrid, Spain.

出版信息

Sensors (Basel). 2019 Feb 21;19(4):917. doi: 10.3390/s19040917.

DOI:10.3390/s19040917

PMID:30795641

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6412765/

Abstract

In this paper, we characterize and measure the effects of the errors introduced by the multipath when obtaining the position of an agent by means of Indoor Positioning Systems (IPS) based on optical signal. These effects are characterized in Local Positioning Systems (LPSs) based on two different techniques: the first one by determining the Angle of Arrival (AoA) of the infrared signal (IR) to the detector; and the second one by working with the measurement of the Phase shift of signal Arrival from the transmitter to a receiver (PoA). We present the obtained results and conclusions, which indicate that using Position Sensitive Devices (PSD) the multipath effects for AoA have little impact on the measurement, while for PoA the positioning errors are very significant, making the system useless in many cases.

摘要

在本文中，我们对多径效应对基于光信号的室内定位系统（IPS）获取代理位置时产生的影响进行了描述和测量。这些影响在基于两种不同技术的本地定位系统（LPS）中进行了描述：第一种技术是通过确定到达探测器的红外信号（IR）的到达角（AoA）；第二种技术是通过测量从发射器到接收器的信号到达相位偏移（PoA）。我们给出了得到的结果和结论，这些结果表明，对于 AoA，使用位置敏感器件（PSD）时，多径效应对测量的影响很小，而对于 PoA，定位误差则非常显著，在许多情况下使得系统变得无用。