同步和异步可见光系统的直接定位

2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom) Pub Date : 2017-06-01 DOI:10.1109/BlackSeaCom.2017.8277702

M. F. Keskin, S. Gezici, O. Arikan

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引用次数: 1

摘要

本文研究了同步和异步可见光系统的直接定位方法。首先，在考虑信道衰减因子和时延参数信息的情况下，导出了同步场景下的最大似然估计量(MLE)和cram r- rao下界(CRLB);然后，研究了异步可见光定位(VLP)系统，并基于接收信号强度(RSS)信息获得相应的crlb和mle。结果表明，在温和条件下，直接位置估计器和两步位置估计器在异步情况下是等效的。通过数值算例对理论结果进行了说明。

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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Direct positioning in synchronous and asynchronous visible light systems

In this paper, direct positioning approaches are investigated for both synchronous and asynchronous visible light systems. First, the maximum likelihood estimator (MLE) and the Cramér-Rao lower bound (CRLB) are derived for the synchronous scenario by considering the information from both channel attenuation factors and time delay parameters. Then, asynchronous visible light positioning (VLP) systems are investigated and the corresponding CRLBs and MLEs are obtained based on received signal strength (RSS) information. It is shown that the direct and two-step position estimators are equivalent in the asynchronous scenario under mild conditions. Numerical examples are provided to illustrate the theoretical results.

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2017 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom)

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