On the more accurate channel model and positioning based on time-of-arrival for visible light localization

Changeez Amini; Abbas Taherpour; Tamer Khattab; Saeed Gazor

doi:10.1117/1.OE.56.1.016110

16 January 2017 On the more accurate channel model and positioning based on time-of-arrival for visible light localization

Changeez Amini, Abbas Taherpour, Tamer Khattab, Saeed Gazor

Author Affiliations +

Optical Engineering, Vol. 56, Issue 1, 016110 (January 2017). https://doi.org/10.1117/1.OE.56.1.016110

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.

Citation Download Citation

Changeez Amini, Abbas Taherpour, Tamer Khattab, and Saeed Gazor "On the more accurate channel model and positioning based on time-of-arrival for visible light localization," Optical Engineering 56(1), 016110 (16 January 2017). https://doi.org/10.1117/1.OE.56.1.016110

Received: 11 October 2016; Accepted: 7 December 2016; Published: 16 January 2017

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