Accuracy analysis and improvement of visible light positioning based on VLC system using orthogonal frequency division multiple access

Yitong Xu, Zixiong Wang, Peixi Liu, Jian Chen, Shiying Han, Changyuan Yu, Jinlong Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


In this paper, we proposed a system that realized simultaneously visible light positioning (VLP) and visible light communications (VLC) in the same band by using orthogonal frequency division multiple access (OFDMA). This system used the power of data sequence as the metric to estimate the transmission distances and consequently the receiver’s position, without deteriorating the VLC’s throughput. We theoretically analyzed the positioning errors in both overdetermined and determined VLP systems. In overdetermined VLP system, optimal selection of master light-emitting diode (LED) avoided the fluctuation of positioning error. Excluding the LED with longest transmission distance changed the overdetermined VLP system to determined VLP system, and reduced the positioning error. The power allocation scheme reduced further the positioning error in determined VLP system. This method was fast and e ective. The well-matched theoretical and Monte-Carlo (MC) simulation results validated our proposed VLP based on VLC system using OFDMA.

Original languageEnglish
Pages (from-to)32618-32630
Number of pages13
JournalOptics Express
Issue number26
Publication statusPublished - 25 Dec 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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