Presentation 2016-12-01
[Poster Presentation] A Study on Hybrid PWM/PAM Dimming Control for Digital Color Shift Keying Using RGB-LED Array
Jumpei Okumura, Yusuke Kozawa, Yohtaro Umeda,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In this paper, we consider a hybrid pulse width modulation / pulse amplitude modulation (PWM/PAM) system for digital color shift keying (DCSK) using RGB-LED array as a method of dimming support for visible light communication. DCSK is an optical intensity modulation scheme which transmits data imperceptibly through the variation of the color emitted by red, green and blue light emitting diodes. In DCSK, the variation can be represented by the digitally controlled "on-off" intensities of multiple RGB-LEDs. Generally, for the dimming control system of DCSK, two kinds of scheme are considered. One is the dimming control by PWM which changes the duty cycle of optical transmit signals, and the other is the dimming control by digitally controlled PAM with coordinated multiple RGB-LEDs usage. In the proposed system, PWM and PAM are combined to realize wider dimming range than PAM and higher spectral efficiency than PWM. We evaluate the error performances of the proposed system, DCSK with PWM and DCSK with PAM from simulation analysis under several measured light dimming levels. Consequently, the proposed system can improve the averaged received signal energy-to-noise ratio per symbol compared with DCSK with PWM and DCSK with PAM.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) visible light communication / color shift keying / digital color shift keying / LED / dimming control
Paper # WBS2016-66,ITS2016-33,RCC2016-55
Date of Issue 2016-11-24 (WBS, ITS, RCC)

Conference Information
Committee WBS / RCC / ITS
Conference Date 2016/12/1(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Sunport Hall Takamatsu
Topics (in Japanese) (See Japanese page)
Topics (in English) ITS Communications, Reliable Communication and Control, Rader and Sensing, etc.
Chair Fumiaki Maehara(Waseda Univ.) / Shinsuke Hara(Osaka City Univ.) / Tomotaka Nagaosa(Kanto Gakuin Univ.)
Vice Chair Masanori Hamamura(Kochi Univ. of Tech.) / Fumie Ono(NICT) / Kazunori Hayashi(Kyoto Univ.) / Ryu Miura(NICT) / Masahiro Fujii(Utsunomiya Univ.) / Tomotaka Wada(Kansai Univ.)
Secretary Masanori Hamamura(Tokyo City Univ.) / Fumie Ono(Mitsubishi Electric) / Kazunori Hayashi(Kagawa Univ.) / Ryu Miura(Hokkaido Univ.) / Masahiro Fujii(Meiji Univ.) / Tomotaka Wada(AIST)
Assistant Yusuke Kozawa(Tokyo Univ. of Science) / Akira Nakamura(Tokyo Univ. of Science) / Ryohei Nakamura(National Defense Academy) / Toshinori Kagawa(NICT) / Kentaro Kobayashi(Nagoya Univ.) / Tetsuya Manabe(Saitama Univ.) / Yanlei Gu(Univ. of Tokyo) / Koichiro Hashiura(Akita Pref. Univ.)

Paper Information
Registration To Technical Committee on Wideband System / Technical Committee on Reliable Communication and Control / Technical Committee on Intelligent Transport Systems Technology
Language ENG-JTITLE
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Poster Presentation] A Study on Hybrid PWM/PAM Dimming Control for Digital Color Shift Keying Using RGB-LED Array
Sub Title (in English)
Keyword(1) visible light communication
Keyword(2) color shift keying
Keyword(3) digital color shift keying
Keyword(4) LED
Keyword(5) dimming control
1st Author's Name Jumpei Okumura
1st Author's Affiliation Tokyo University of Science(TUS)
2nd Author's Name Yusuke Kozawa
2nd Author's Affiliation Tokyo University of Science(TUS)
3rd Author's Name Yohtaro Umeda
3rd Author's Affiliation Tokyo University of Science(TUS)
Date 2016-12-01
Paper # WBS2016-66,ITS2016-33,RCC2016-55
Volume (vol) vol.116
Number (no) WBS-337,ITS-338,RCC-339
Page pp.pp.107-112(WBS), pp.107-112(ITS), pp.107-112(RCC),
#Pages 6
Date of Issue 2016-11-24 (WBS, ITS, RCC)