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AuthorAmini, Changeez
AuthorTaherpour, Abbas
AuthorKhattab, Tamer
AuthorGazor, Saeed
Available date2022-11-01T09:01:31Z
Publication Date2017
Publication NameOptical Engineering
ResourceScopus
Resource2-s2.0-85010002229
URIhttp://dx.doi.org/10.1117/1.OE.56.1.016110
URIhttp://hdl.handle.net/10576/35688
AbstractThis 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. 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).
Languageen
PublisherSPIE
SubjectCramer-Rao bound
optical wireless channel
positioning systems
visible light communications
TitleOn the more accurate channel model and positioning based on time-of-arrival for visible light localization
TypeArticle
Issue Number1
Volume Number56
dc.accessType Abstract Only


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