Visible Light Communication Receiving Technology

Chi, Nan

doi:10.1007/978-3-662-56660-2_4

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…So through LEDs the signal can be modulated into visible light. `White LEDs, combining both light and data transmissions, have further promoted the development of VLC technologies [7].…”

Section: Led Lightmentioning

confidence: 99%

Metamerism Index of Led Light on Halftone Colour Images

Zjakić

Ljevak²,

Bilalli³

2021

Acta Graphica

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Skin face detection in photo imaging, is an important component of systems for detecting similarities in visual perception, tracing faces through illumination and metamerism. This paper presents an evaluation of the skin perception under standardized conditions of varied light sources: cool-white fluorescent “store light”, 6500K fluorescent “daylight”, and incandescent “home light”, Led light 6500 K, 2700K, 4000K CCT. In cases where the discrepancy is large, the resulting index of metamerism can be misleading. A small index of metamerism and a large change of color under illuminant metamerism has a different interpretation than what is perceived. This has been demonstrated through small colour variations in print through CMYK colors. The implication is that particular indices of metameric should only account for a limited range under different light conditions. The method used in this paper is based on visual perception, which aim to work with a wide variety of individuals, under varying lighting conditions under the influence of standard daylight, but in this case we also used the Led light 6500K correlated colour temperature, and variations of skin color tones, comparing the illuminant metamerism of visual perception based on different reflectance power distributions (SPDs).

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“…So through LEDs the signal can be modulated into visible light. `White LEDs, combining both light and data transmissions, have further promoted the development of VLC technologies [7].…”

Section: Led Lightmentioning

confidence: 99%

Metamerism Index of Led Light on Halftone Colour Images

Zjakić

Ljevak²,

Bilalli³

2021

Acta Graphica

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“…However, the light emitted by LEDs has poor coherence, large linewidth, low bandwidth, and a large beam divergence angle, thus limiting the transmission distance and transmission rate of UWOC systems using LEDs as light sources [15]. To overcome these problems, an arrayed LED light source can be used to increase the transmission distance [16], and a modulation technique with higher spectral efficiency can be used to increase the transmission rate [17]. In 2009, Massachusetts Institute of Technology (MIT) researchers developed a bidirectional, high-speed UWOC system [18], which consisted of an arrayed light source and a detector of six 5W-blue LEDs.…”

Section: Introductionmentioning

confidence: 99%

Research on a Blue–Green LED Communication System Based on an Underwater Mobile Robot

Shen,

Guo,

Liang

et al. 2023

Photonics

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Underwater robots have been widely used in ocean exploration, deep-sea observation, seabed operations, marine scientific research, and other fields. Underwater low-latency, efficient, and safe communication modes are key to realizing the application of an underwater robot data transmission system. This paper mainly studies the optical communication between underwater mobile robots, including the large-dispersion-angle light-emitting diode (LED) design, large field of view receiving technology, weak light detector technology, etc. By designing a 120° large divergence angle underwater optical communication system in this study, the receiving field-of-view angle of the receiving end can reach 60°, which is suitable for the optical communication system of an underwater mobile platform. The high-power LED driver circuit is designed to drive the high-power LED and adopt weak light detection technology to ensure its stability and reliability. The experimental results show that, in the case of incomplete alignment between the transmitter and receiver, stable communication of underwater robots in motion is achieved through the design of a large divergence angle and a receiving field-of-view angle and the use of an underwater weak light detection technology. The communication distance is 30 m, and the communication rate remains above 10 Mbps. The information transmission content can include network data transmission, real-time video, high-definition video, high-definition images, and other data types. This equipment provides a solution for cableless data transmission of remotely operated vehicles (ROVs) and substantially enhances the application field of ROVs.

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Visible Light Communication Receiving Technology

Cited by 2 publications

References 14 publications

Metamerism Index of Led Light on Halftone Colour Images

Metamerism Index of Led Light on Halftone Colour Images

Research on a Blue–Green LED Communication System Based on an Underwater Mobile Robot

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