Optimizing the Light Source Layout of the Indoor Visible Light Communication System

Liu, Che; Tang, Yanfeng; Wu, Yueheng; Bai, Yafang

doi:10.1109/access.2022.3156265

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…where I(0) is the center luminous intensity of an LED, other parameters have the same meaning as in (1). When considering the light undergoing one reflection, the horizontal illumination under the NLoS link is given as (7), the analysis of ( 7) is similar to (4) and is not elaborated here,…”

Section: Indoor Illuminationmentioning

confidence: 99%

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Uniformity optimization for indoor visible light communications with multiple light sources

Xie,

Liu,

Wang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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Indoor wireless communications scenario is one of the most typical applications for visible light communications (VLC). To make the best of indoor VLC, the overall system performance relies heavily on the illumination and received power uniformity of the receiving plane. To achieve this goal, we first propose a general symmetric double-rectangle (SDR) layout scheme suitable for rectangular indoor spaces, while its symmetry reduces the dimension of the subsequent optimization and improves the illumination and received power uniformity. We apply the SDR scheme into two models according to different layout method at the center of the spaces, named SDR-3P and SDR-2P, respectively, in a (5 × 5 × 3)m 3 rectangular cube. Simulation results show that, compared with the traditional four-light model, the uniform illumination ratios (UIR) of the two models, SDR-3P and SDR-2P, are improved by 14.3% and 28.6%, respectively, while the power standard deviations are reduced by 17.9% and 53.6%. To further improve the received power uniformity, we use an adaptive differential evolution algorithm, named JADE to optimize the position of light sources. Based on the above optimizations, we further consider the influences of transmit power and refractive index on the receiving plane, which also affect the received power and illumination uniformity. The final results show that, compared with the traditional four-light model, both the illumination and the received power uniformity are greatly improved, with the UIR improved by 47.6% and 33.3%, and the power standard deviation reduced by 84.0% and 73.2%, respectively.

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Section: Indoor Illuminationmentioning

confidence: 99%

“…Besides, intelligent optimization algorithms have been applied to light source layout optimization, and the best layout that meets the conditions can be obtained through the optimization of light source positions. 6,7 The light source parameters likewise have an impact on the indoor VLC system. Ref.…”

Section: Introductionmentioning

confidence: 99%

Uniformity optimization for indoor visible light communications with multiple light sources

Xie,

Liu,

Wang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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“…The Lambert radiation model is used to simulate the emission of light sources. 19,20 The intensity distribution of an LED can be expressed as…”

Section: Indoor Vlc System Theorymentioning

confidence: 99%

Design and optimization of the annular light source layout of the indoor visible light communication system

Jing,

Yu,

Wang

et al. 2024

Opt. Eng.

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“…DIFF is the response after k-reflection to the LED source that is given by [15]. Studies show that the NLOS component accounts for about 7% of the total received power [11]. Moreover, there is no clear linear relationship between r and N ref .…”

Section: System Model 21 Channel Modelmentioning

confidence: 99%

“…Liu and Tang proposed a square plus ellipse layout, optimized by using the simulated annealing and particle swarm algorithms. The uniformity of the illumination and SNR is further improved [11]. Che and Wang proposed a hybrid immune clonal bat algorithm to optimize the layout of the light source, which enhances the fair distribution of optical power among indoor users [12].…”

Section: Introductionmentioning

confidence: 99%

Design of the Light Source Layout Optimization Strategy Based on Region Partition and Pre-Bias Compensation for Indoor Visible Light Communication Systems

Zhao,

Zhang,

Fan

et al. 2023

Photonics

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Optimization of the light source layout is an important issue for indoor visible light communication systems, as it affects the received optical power distribution and user perception. In this paper, we propose a local optimization strategy for the light source layout that balances optimization effectiveness with optimization efficiency. First, we divide the optimization region into multiple sub-regions with different sizes and optimization priorities, where the sizes and optimization priorities of the individual sub-regions are determined based on the effect minimization principle among the sub-regions. We then calculate the pre-bias factor based on the equivalent mapping, which can compensate for the effect of the light sources in the latter optimized sub-region on the source layout optimization in the current sub-region. Finally, we search for the coordinate of a single light source for each sub-region using the variance of the squared distance between the projection of the light source on the receiving plane and the received point as a fitness function. Simulation results show that the proposed optimization strategy performs well when the vertical distance between the ceiling and the receiving plane is not less than 2.85 m.

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Optimizing the Light Source Layout of the Indoor Visible Light Communication System

Cited by 6 publications

References 10 publications

Uniformity optimization for indoor visible light communications with multiple light sources

Uniformity optimization for indoor visible light communications with multiple light sources

Design and optimization of the annular light source layout of the indoor visible light communication system

Design of the Light Source Layout Optimization Strategy Based on Region Partition and Pre-Bias Compensation for Indoor Visible Light Communication Systems

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