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Square Wave Quadrature Amplitude Modulation for Visible Light Communication Using Image Sensor

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Title: Square Wave Quadrature Amplitude Modulation for Visible Light Communication Using Image Sensor
Authors: Alfarozi, Syukron Abu Ishaq Browse this author
Pasupa, Kitsuchart Browse this author
Hashizume, Hiromichi Browse this author →KAKEN DB
Woraratpanya, Kuntpong Browse this author
Sugimoto, Masanori Browse this author →KAKEN DB
Keywords: Visible light communication (VLC)
image sensor communication (ISC)
exposure time
square wave quadrature amplitude modulation (SW-QAM)
Issue Date: 11-Jul-2019
Publisher: IEEE (Institute of Electrical and Electronics Engineers)
Journal Title: IEEE Access
Volume: 7
Start Page: 94806
End Page: 94821
Publisher DOI: 10.1109/ACCESS.2019.2928417
Abstract: Most visible light communication (VLC) technologies use a light emitting diode (LED) as a data transmitter and a photodiode as a receiver. In this paper, we alternatively focus on the use of an image sensor or camera as a receiver due to its wide availability. However, the successful use of an image sensor mainly depends on the efficiency of the encoder-decoder and the modulation scheme. Thus, this paper proposes a novel modulation scheme based on a square wave signal called a square wave quadrature amplitude modulation (SW-QAM) method. This method can accommodate different camera settings and overcome the problem of LED flicker that is generally sensed by human eyes when the LED frequency is low. At the transmitter side, multiple LEDs can be used to increase the transmission bit rate, while, at the receiver side, a Wiener filter is used as a complementary technique to SW-QAM for solving the light interference phenomenon due to the closeness of one LED to another. Our experimental results show that the proposed SW-QAM scheme can decode symbols very well either the for close or far communication distances, dark or bright lighting conditions, and single or multiple LED points.
Rights: © 2019 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/75343
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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