The Visible Light Communication Vlc Video
Visible Light Communication (VLC) Prototype Demonstration The Visible Light Communication Vlc
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This paper proposes a novel power-efficient VVisible diode LED placement algorithm for indoor visible light communication VLC. In the considered model, the LEDs can be designedly placed for high power efficiency while satisfying the indoor communication and illumination requirements. This design problem is formulated as a https://amazonia.fiocruz.br/scdp/blog/purdue-owl-research-paper/health-disparity-and-health-disparities.php minimization problem under both communication and illumination level constraints.
Due to the interactions among LEDs and the illumination uniformity constraint, the formulated problem is complex and non-convex.
To solve the problem, we first transform the complex uniformity constraint into a series of linear constraints. Then an iterative algorithm is proposed to decouple the interactions among LEDs and transforms the original problem into a series of convex The Visible Light Communication Vlc. Then, we use Lagrange dual method to solve the sub-problem and obtain a convergent solution of the original problem. Under this background, light emitting diode LED has gained increasing market rate due to its high power efficiency and low cost.
Moreover, a promising short range wireless access technology based on LEDs, termed as visible light communication VLChas also gained increasing attentions [ 2 ]. Compared with conventional radio-frequency based access technologies, VLC has high power efficiency due to the use https://amazonia.fiocruz.br/scdp/blog/gregorys-punctuation-checker-tool/comparing-males-in-brownings-porphyrias-lover-and.php visible light.
In addition, It also has the advantage of abundant bandwidth resource, inherent high security, flexibility and rapid deployment time [ 3 ]. Besides these promising advantages, VLC also has some key design issues that should be carefully tackled, and the indoor LED arrangement problem is one of them.
1. Introduction
In particular, VLC involves both The Visible Light Communication Vlc and illumination. That means besides the communication requirement of users, the illumination requirement of users should also be considered for a VLC system. Besides, since indoor illumination typically requires a number of closely located LEDs for sufficient illuminance level, the illumination and communication interactions of LEDs need to be considered in indoor LED arrangement. Hereafter, we use the interaction of LEDs to indicate link fact that the signal from each LED can be constructively added at the receiver from the perspective of illumination while that can The Visible Light Communication Vlc be the interference of each other from the perspective of communication. In addition, the illuminance at the receiver plane should be uniform, which is preferred for indoor illumination engineering [ 4 ].
All these factors need to be considered in indoor LED arrangement designs, which make the problem a challenging design issue. A plethora go here studies on indoor LED arrangement have been proposed, which can be classified into two types [ 5 ].
One type of approach is by appropriately allocating power to LEDs [ 4 — 8 ].
Which visible light communication applications do you find most beneficial?
In [ 5 ], the uniform illuminance problem was formulated as a convex problem, which was then solved by quadratic programming to optimize the power of each LED. In [ 6 ], a heuristic power allocation scheme was proposed for a random LED array to obtain uniform irradiance on the projection surface. In [ 7 ], a joint optimization of LED power allocation and orientation was proposed for uniform illumination.]
It is similar to it.