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Optical Engineering

On the more accurate channel model and positioning based on time-of-arrival for visible light localization
Author(s): Changeez Amini; Abbas Taherpour; Tamer Khattab; Saeed Gazor
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Paper Abstract

This paper presents an improved propagation channel model for the visible light in indoor environments. We employ this model to derive an enhanced positioning algorithm using on the relation between the time-of-arrivals (TOAs) and the distances for two cases either by assuming known or unknown transmitter and receiver vertical distances. We propose two estimators, namely the maximum likelihood estimator and an estimator by employing the method of moments. To have an evaluation basis for these methods, we calculate the Cramer–Rao lower bound (CRLB) for the performance of the estimations. We show that the proposed model and estimations result in a superior performance in positioning when the transmitter and receiver are perfectly synchronized in comparison to the existing state-of-the-art counterparts. Moreover, the corresponding CRLB of the proposed model represents almost about 20 dB reduction in the localization error bound in comparison with the previous model for some practical scenarios.

Paper Details

Date Published: 16 January 2017
PDF: 12 pages
Opt. Eng. 56(1) 016110 doi: 10.1117/1.OE.56.1.016110
Published in: Optical Engineering Volume 56, Issue 1
Show Author Affiliations
Changeez Amini, Imam Khomeini International University (Iran)
Abbas Taherpour, Imam Khomeini International University (Iran)
Tamer Khattab, Qatar University (Qatar)
Saeed Gazor, Queen’s University (Canada)

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