Two-wavelength adaptive thresholding for uplink from smartphone’s low-luminance WDM/SDM screen to camera

Alisa Kawade; Wataru Chujo; Kentaro Kobayashi

doi:10.1587/comex.2022XBL0074

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Two-wavelength adaptive thresholding for uplink from smartphone’s low-luminance WDM/SDM screen to camera

Alisa Kawade, Wataru Chujo, Kentaro Kobayashi

著者情報

キーワード: visible light communication, optical camera communication, screen camera communication, space division multiplexing, wavelength division multiplexing, inter-symbol interference

ジャーナルフリー早期公開

論文ID: 2022XBL0074

DOI https://doi.org/10.1587/comex.2022XBL0074

この記事には本公開記事があります。

The final version of this article is now available: Vol. 11 (2022), No. 7 pp. 441-447

詳細

抄録

Secure uplink from smartphone screen to camera communication (SCC) needs to increase the throughput and simultaneously reduce the screen luminance. To realize low-luminance wavelength division multiplexing / space division multiplexing (WDM/SDM) transmission, 2-wavelength adaptive thresholding that categorizes both inter-wavelength and spatial inter-symbol interferences (ISIs) is proposed and experimentally verified. The camera images are categorized into 3×3 cells and the symbol of the center cell is determined. The inter-wavelength ISIs are categorized by the pixel value of the center cell of the other wavelength. The spatial ISIs are categorized by the outer 8-cell symbol pattern estimated at the same wavelength.

責任著者(Corresponding author)

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