Browsing by Author "Cheng, J."

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    Emerging optical wireless communications-advances and challenges
    (IEEE, 2015-09) Ghassemlooy, Z.; Arnon, S.; Uysal, Murat; Xu, Z.; Cheng, J.; Electrical & Electronics Engineering; UYSAL, Murat
    New data services and applications are emerging continuously and enhancing the mobile broadband experience. The ability to cope with these varied and sophisticated services and applications will be a key success factor for the highly demanding future network infrastructure. One such technology that could help address the problem would be optical wireless communications (OWC), which presents a growing research interest in the last few years for indoor and outdoor applications. This paper is an overview of the OWC systems focusing on visible light communications, free space optics, transcutaneous OWC, underwater OWC, and optical scattering communications.
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    Guest editorial: Optical wireless communications
    (IEEE, 2015-09) Arnon, S.; Uysal, Murat; Ghassemlooy, Z.; Xu, Z.; Cheng, J.; Electrical & Electronics Engineering; UYSAL, Murat
    Optical wireless communication (OWC) systems provide many advantages over radio frequency (RF) wireless technologies in some scenarios, including significantly higher data rates and a large amount of available license-free frequency spectrum. Recently, OWC has also been proposed in fifth generation 5G standard as a tool to augment capacity due to RF spectrum crunching challenges. Various forms of OWC can be used to augment RF capacity at both access and backhaul/fronthaul levels. Despite the major advantages and various application areas, the widespread deployment of OWC is delayed by several challenges, such as the demand to maintain strict line-of-sight alignment between transmitter and receiver in long range outdoor applications; the need to combat attenuation due to adverse weather conditions such as fog, cloud, and turbulence; to modulate light emitting diodes at high frequencies without distortion at indoor visible light communication (VLC) applications and retaining power levels within the eye safety limits for laser transmitters and comfortable illumination levels for LED transmitters.