Research Paper On Visible Light Communication

They are generally being replaced with energy-efficient alternatives, such as fluorescent lights, compact fluorescents and LEDs.Though the core logic behind such a policy would appear sound to most individuals, this drive has met with resistance in certain quarters due to perceived doubts about the ecological suitability of some of the proposed alternatives, particularly fluorescent and compact fluorescent lamp units - .An additional incentive at present is that, whilst free usage of radiowave and microwave wireless communications is restricted by law, VLC technologies do not, as yet, require licenses.

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To date the Infrared Data Association (Ir DA) has standardised over 30 specifications that are widely implemented for cordless phones, printers, televisions and other devices.

Its 2008 market-report indicated a prolific increase of Ir DA infrared enabled devices, of which over 1 billion units have been shipped to date, and that demand for such units was likely to increase greatly, particularly with the development of Ir Simple version 1.0 and technological advances used for Giga-IR.

Their use may help provide both partial and full solutions to a number of technological problems: increasingly limited availability of conventional bandwidths for electronic equipment; possible communications interference with sensitive electrical equipment; data security; and perceived negative health consequences when exposed to raised radiofrequency and microwave levels.

The incorporation of VLC components into everyday technology is being investigated by a number of universities, corporations and organisations worldwide, and has already resulted in the creation of the Japan Electronics and Information Technology Industries Association’s JEITA standards (2007) for a “visible light ID system”, and a Specification Standard in 2008 by the Visible Light Communications Consortium (VLCC) - as a result of its joint cooperative agreement with the Infrared Data Association (Ir DA).

2010: The Center for Ubiquitous Communication by Light (UC-Light) at the University of California seeks to develop VLC technology further to allow communication between a wide variety of electronic products, such as high definition televisions, information kiosks, personal computers (PCs), personal digital assistants (PDAs) and smartphones.

2009: A result of the joint cooperative agreement between VLCC and the Ir DA, VLCC issue their first Specification Standard which incorporates and expands upon core Ir DA specification and defined spectrum to allow for the use of visible light wavelengths.If it is developed correctly, the possibility exists that many of the problems associated with present day infrared, radiowave and microwave communications systems () could be at least partially resolved, and a more biologically friendly system made available to industries and the general public.A further advantage is that VLC systems can transmit data more securely over short distances than radiofrequency/microwave communications devices whose signals can be easily detected outside the rooms and buildings they originate in.LED (Light Emitting Diode) VLC technology LED (Light Emitting Diode) Visible Light Communications (VLC) systems are recognised as creating a possible valuable addition to future generations of technology, which have the potential to utilise light for the purposes of advanced technological communication at ultra high speed surpassing that of current wireless systems.One of the goals of researchers is to allow 100 megabits of data transference per second (Mbps) in offices and homes by modulation of light from upgraded lighting systems.As noted by the Visible Light Communications Consortium (VLCC) which was formed in Japan in 2003 (and includes amongst its members Casio, NEC Corporation, Panasonic, Samsung, Sharp and Toshiba), “…visible light communication has characteristics to be ubiquitous, transmitted at ultra high speed and harmless for human body and electronic devices, compared to [emissions] by radio and infrared communications.” Such factors indicate that there is a strong need to ensure that VLC are at least as biologically friendly as the units they are designed to replace or supplement, and that they may offer a more sophisticated solution to the communications technology than is presently available.The same researchers were also able to demonstrate that a system using up to 5 LEDs could transfer data over greater distances at 100 Mbps with direct line of sight.Reduced levels of transmission would have occurred using diffused light from walls outside of line of sight.Whilst visible light from LED systems and infrared emissions share similar frequency ranges, it is acknowledged that there are potential visual safety problems with using infrared for high rates of data transmission due to both the large energy emissions it would create and its invisibility, making suitably developed LED light data transmission a safer option for human eyes.Radiofrequency/Microwave Communications At present the multiple use in buildings of the three independent WLAN frequency bands can often compromise information networks.

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  • Visible Light Communication - Term Paper
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    In this paper we present a new indoor FSO system, also known as a visible light communication VLC system that addresses achieving satisfactory data rates through diffuse link while supporting mobility under line of sight LOS constraints.…

  • Bio Electromagnetic Research Initiative - LiFi - Visible Light.
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    The Visible Light Communications Consortium VLCC is established between major Japanese companies to develop, plan, research and standardise Japan’s own visible light communication systems. Its brief is to develop, test, investigate, plan and standardise ubiquitous high-speed biologically-friendly VLC LED systems.…

  • International Journal of Computer Trends and Technology IJCTT.
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    LEDs is helping to drive this technology in the form of Visible Light Communication VLC. In this paper, a visible light communications system is proposed that employs wavelength division multiplexing, to transmit multiple data streams from different data sources simultaneously and…

  • AN OVERVIEW OF VISIBLE LIGHT COMMUNICATION SYSTEMS - arXiv
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    In recent years, one of the ideas put forward for wireless optical communication is the visible light communication method. The signals in the 380-780 nm wavelength interval of the electromagnetic spectrum are the light signals that can be detected by the human eye. It is…

  • Visible light communication Applications, architecture.
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    Visible Light Communication VLC systems employ visible light for communication that occupy the spectrum from 380 nm to 750 nm corresponding to a frequency spectrum of 430 THz to 790 THz as shown in Fig. 2.…

  • Visible Light Communication Request PDF - Share and discover research
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    Visible light communication VLC is an evolving communication technology for short-range applications. Exploiting recent advances in the development of high-power visible-light emitting LEDs, VLC.…

  • Visible Light Communication Research Papers - Academia.edu
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    This paper expounds the background of the development of visible light communication technology which uses light emitting diodes as a transmitting module and the development status at home and abroad analysis its system advantages, limitations, key technologies, characteristics and existing problems, looks forward to future research trends, and.…

  • PDF Visible Light Communications VLC Technology
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    This article reviews the visible light communications VLC, a technology in which the visible spectrum is modulated to transmit data. It presents the VLC communication system the transmitter.…

  • Design and Implementation of Visible Light Communication. -
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    Abstract— Visible light communication is a short range optical wireless communication technology thatis used for the illumination and data communication simultaneously. It is one of the most promising technologies for the indoor wireless communication as it opens the broad spectrum for applications.…

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