A Dynamic Beamforming Technique for Ultraviolet-Based Indoor Communications

Aung, Thinn Yu; Arya, Sudhanshu; Chung, Yeon Ho

doi:10.1109/jsen.2020.2994071

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…The general framework on the design and implementation of some systems is adequately described in [3]. In [9], a novel dynamic beamforming method has been suggested which makes use of the distance to estimate the user location. Note that the challenges of an indoor optical wireless medical body area network were discussed in [10], where the MC method was employed to estimate the channel impulse response (CIR).…”

Section: A Related Workmentioning

confidence: 99%

“…For example, assuming that T = 25 • C, R H = 50%, and l V = 10 km, (9) implies that the diameter of water droplets corresponding to this environmental condition is d = 5.307 nm. It becomes evident that during average atmospheric visibility, the diameter of water particles is much smaller than the wavelength, justifying the assumption that the interaction between the photons and the water droplets can adequately be described by Rayleigh scattering.…”

Section: A Rayleigh Scatteringmentioning

confidence: 99%

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LaUV: A Physics-Based UV Light Simulator for Disinfection and Communication Applications

et al. 2021

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The sterilization properties of the C-band of the ultraviolet (UV) light have been wellknown for many years; however, their application has become more vital and widespread today due to the Covid-19 pandemic. Nevertheless, minimal work has been devoted to simulating UV-C propagation for surface disinfection in indoor environments. UV light has also been proposed for non-line-of-sight (NLOS) outdoor communication applications, where a number of simulators have been developed, but with several simplifications. The current work presents a fully-featured simulator for UV light propagation, called LaUV, designed mainly for indoor settings, capable of calculating measurable parameters that can be used for indoor surface disinfection and communication applications. LaUV considers atmospheric absorption and scattering according to Rayleigh and Mie theory, and reflections from rough surfaces. The scattering crosssection and probability density function of the scattering angles (phase function) are calculated accurately for any wavelength, concentration, and diameter distribution of spherical scattering particles (aerosols and droplets). Examples are presented for indoor environments, including empty rooms and rooms with furniture, for different environmental conditions and surface albedos. Interesting initial conclusions can be drawn, considering the spatial distribution of UV exposure for surface disinfection applications and channel modeling for line-of-sight (LOS) and NLOS communication, demonstrating the versatility and the potential applications of the proposed simulator.

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Section: A Related Workmentioning

confidence: 99%

Section: A Rayleigh Scatteringmentioning

confidence: 99%