Lasers, Fiber Optics, and Communications

Indoor location estimation with optical-based orthogonal frequency division multiplexing communications

[+] Author Affiliations
Mohammadreza Aminikashani, Wenjun Gu, Mohsen Kavehrad

The Pennsylvania State University, Center for Information & Communications Technology Research, Department of Electrical Engineering, 111 Electrical Engineering East, University Park, Pennsylvania 16802-2701, United States

Opt. Eng. 55(5), 056116 (May 31, 2016). doi:10.1117/1.OE.55.5.056116
History: Received January 21, 2016; Accepted April 29, 2016
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Abstract.  Visible light communication (VLC) using light-emitting diodes has been gaining increasing attention in recent years as it is appealing for a wide range of applications such as indoor positioning. Orthogonal frequency division multiplexing (OFDM) has been applied to indoor wireless optical communications in order to mitigate the effect of multipath distortion of the optical channel as well as increasing the data rate. An OFDM VLC system is proposed, which can be utilized for both communications and indoor positioning. A positioning algorithm based on power attenuation is used to estimate the receiver coordinates. We further calculate the positioning errors in all the locations of a room and compare them with those using single-carrier modulation schemes, i.e., on–off keying modulation. We demonstrate that our proposed OFDM positioning system outperforms by 74% its conventional counterpart. Finally, we investigate the impact of different system parameters on the positioning accuracy of the proposed OFDM VLC system.

© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Mohammadreza Aminikashani ; Wenjun Gu and Mohsen Kavehrad
"Indoor location estimation with optical-based orthogonal frequency division multiplexing communications", Opt. Eng. 55(5), 056116 (May 31, 2016). ; http://dx.doi.org/10.1117/1.OE.55.5.056116


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