Visible light communications employing PPM and PWM formats for simultaneous data transmission and dimming

Joon-Ho Choi; Eun-byeol Cho; Zabih Ghassemlooy; Soeun Kim; Chung Ghiu Lee

doi:10.1007/s11082-014-9932-0

Visible light communications employing PPM and PWM formats for simultaneous data transmission and dimming

Joon-Ho Choi, Eun-byeol Cho, Zabih Ghassemlooy, Soeun Kim, Chung Ghiu Lee

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

A visible light communication system with simultaneous brightness control and data transmission is experimentally demonstrated in this paper. A pulse-width modulation (PWM) scheme is adopted for brightness control of the light-emitting diode and pulse-position modulation (PPM) superimposed on top of PWM is used for data communications. We show that independent control of light dimming is possible while transmitting data within a typical room environment, provided the PWM dimming period is an integer multiple of the PPM slot duration. To validate this, we show the measured eye diagrams for a range of dimming levels. In addition, we qualitatively illustrate examples of different dimming levels by changing the dimming level while maintaining the PPM data stream.

Original language	English
Pages (from-to)	561-574
Journal	Optical and Quantum Electronics
Volume	47
Issue number	3
DOIs	https://doi.org/10.1007/s11082-014-9932-0
Publication status	Published - Mar 2015

Keywords

optical communications
optical wireless communications
visible light communications
illumination
light-emitting diodes
dimming control
PPM
PWM

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10.1007/s11082-014-9932-0

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title = "Visible light communications employing PPM and PWM formats for simultaneous data transmission and dimming",

abstract = "A visible light communication system with simultaneous brightness control and data transmission is experimentally demonstrated in this paper. A pulse-width modulation (PWM) scheme is adopted for brightness control of the light-emitting diode and pulse-position modulation (PPM) superimposed on top of PWM is used for data communications. We show that independent control of light dimming is possible while transmitting data within a typical room environment, provided the PWM dimming period is an integer multiple of the PPM slot duration. To validate this, we show the measured eye diagrams for a range of dimming levels. In addition, we qualitatively illustrate examples of different dimming levels by changing the dimming level while maintaining the PPM data stream.",

keywords = "optical communications, optical wireless communications, visible light communications, illumination, light-emitting diodes, dimming control, PPM, PWM",

author = "Joon-Ho Choi and Eun-byeol Cho and Zabih Ghassemlooy and Soeun Kim and Lee, {Chung Ghiu}",

note = "Published online ahead of print publication.",

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doi = "10.1007/s11082-014-9932-0",

language = "English",

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T1 - Visible light communications employing PPM and PWM formats for simultaneous data transmission and dimming

AU - Choi, Joon-Ho

AU - Cho, Eun-byeol

AU - Ghassemlooy, Zabih

AU - Kim, Soeun

AU - Lee, Chung Ghiu

N1 - Published online ahead of print publication.

PY - 2015/3

Y1 - 2015/3

N2 - A visible light communication system with simultaneous brightness control and data transmission is experimentally demonstrated in this paper. A pulse-width modulation (PWM) scheme is adopted for brightness control of the light-emitting diode and pulse-position modulation (PPM) superimposed on top of PWM is used for data communications. We show that independent control of light dimming is possible while transmitting data within a typical room environment, provided the PWM dimming period is an integer multiple of the PPM slot duration. To validate this, we show the measured eye diagrams for a range of dimming levels. In addition, we qualitatively illustrate examples of different dimming levels by changing the dimming level while maintaining the PPM data stream.

AB - A visible light communication system with simultaneous brightness control and data transmission is experimentally demonstrated in this paper. A pulse-width modulation (PWM) scheme is adopted for brightness control of the light-emitting diode and pulse-position modulation (PPM) superimposed on top of PWM is used for data communications. We show that independent control of light dimming is possible while transmitting data within a typical room environment, provided the PWM dimming period is an integer multiple of the PPM slot duration. To validate this, we show the measured eye diagrams for a range of dimming levels. In addition, we qualitatively illustrate examples of different dimming levels by changing the dimming level while maintaining the PPM data stream.

KW - optical communications

KW - optical wireless communications

KW - visible light communications

KW - illumination

KW - light-emitting diodes

KW - dimming control

KW - PPM

KW - PWM

U2 - 10.1007/s11082-014-9932-0

DO - 10.1007/s11082-014-9932-0

M3 - Article

SN - 0306-8919

VL - 47

SP - 561

EP - 574

JO - Optical and Quantum Electronics

JF - Optical and Quantum Electronics

IS - 3

ER -

Visible light communications employing PPM and PWM formats for simultaneous data transmission and dimming

Abstract

Keywords

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