Forward and correctional OFDM-based visible light positioning

Wei Li; Zhitong Huang; Runmei Zhao; Peixuan He; Yuefeng Ji

doi:10.1117/1.OE.56.9.090501

1 September 2017 Forward and correctional OFDM-based visible light positioning

Wei Li, Zhitong Huang, Runmei Zhao, Peixuan He, Yuefeng Ji

Author Affiliations +

Optical Engineering, Vol. 56, Issue 9, 090501 (September 2017). https://doi.org/10.1117/1.OE.56.9.090501

Abstract

Visible light positioning (VLP) has attracted much attention in both academic and industrial areas due to the extensive deployment of light-emitting diodes (LEDs) as next-generation green lighting. Generally, the coverage of a single LED lamp is limited, so LED arrays are always utilized to achieve uniform illumination within the large-scale indoor environment. However, in such dense LED deployment scenario, the superposition of the light signals becomes an important challenge for accurate VLP. To solve this problem, we propose a forward and correctional orthogonal frequency division multiplexing (OFDM)-based VLP (FCO-VLP) scheme with low complexity in generating and processing of signals. In the first forward procedure of FCO-VLP, an initial position is obtained by the trilateration method based on OFDM-subcarriers. The positioning accuracy will be further improved in the second correctional procedure based on the database of reference points. As demonstrated in our experiments, our approach yields an improved average positioning error of 4.65 cm and an enhanced positioning accuracy by 24.2% compared with trilateration method.

Citation Download Citation

Wei Li, Zhitong Huang, Runmei Zhao, Peixuan He, and Yuefeng Ji "Forward and correctional OFDM-based visible light positioning," Optical Engineering 56(9), 090501 (1 September 2017). https://doi.org/10.1117/1.OE.56.9.090501

Received: 8 February 2017; Accepted: 3 August 2017; Published: 1 September 2017

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