Down-link performance of an LED based visible light communication system through dynamic control of semi-angle

Sharma, Ram Kumar; Kumari, A. Charan; Aggarwal, Mona; Ahuja, Swaran

doi:10.1016/j.phycom.2019.01.008

Cited by 5 publications

(1 citation statement)

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“…As the optimization is performed only on the transmitter side this approach can be treated as a sub‐optimal solution to improve the performance of a multi‐cell indoor VLC system. In Reference39, optimally designed semi‐angle with the appropriate LED arrangement was investigated to improve various communication performances. The significance of LED lamp arrangement to reduce SNR fluctuation has also been reported in another work 40 .…”

Section: Introductionmentioning

confidence: 99%

Signal to interference plus noise ratio improvement of a multi‐cell indoor visible light communication system through optimal parameter selection complying lighting constraints

Chatterjee

Sabui

Khan

et al. 2021

Trans Emerging Tel Tech

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To achieve improved communication and illumination performances of a multi‐cell indoor visible light communication system, the selection of transmitter configuration and receiver's field of view (FoV) play a critical role. Based on multiple criteria decision modeling, a design‐centric methodology is proposed in this paper to determine the optimal transmitter configuration and receiver's FoV under lighting constraints. These optimal parameter selections are instrumental to obtain a highly uncorrelated channel, thus significantly mitigate both co‐channel interference from the neighboring transmitter and intersymbol interference due to multipath reflection. The implication for the optimum selection is explored using two communication false(Ptrue‾sig,Ptrue‾intffalse) and two lighting (Eavg, UO) performance indicating metrics. For a typical indoor scenario, three different transmitter arrangements with varying half‐power beam‐width are considered as alternatives. Furthermore, the signal to interference plus noise ratio (SINR) is tested over the communication floor (CF) by a simple receiver structure with a single photodiode. Incorporating the optimal transmitter configuration and receiver's FoV, 36.13 dB average SINR and 345 lx average horizontal illuminance is achieved. Analytically obtained SINR is also validated using a commercial ray tracing optical software for different positions over the CF. In comparison with the state of the art non‐optimal and sub‐optimal solutions, the proposed scheme, without real‐time computational complexity exhibits noteworthy improvement in SINR performance at expense of a trivial drop in overall uniformity of horizontal illuminance.

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Section: Introductionmentioning

confidence: 99%