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The formal definition of flicker is the “impression of unsteadiness of visual sensation induced by a light stimulus whose luminance or spectral distribution fluctuates with time” (IEC 60050- 161, 1990)
Flicker is a very complex aspect of power quality that is somewhat subjective by nature due to how an individual perceives it. When most people or power consumers refer to flicker, it is usually in reference to an inconstant or wavering light. A more precise definition of lamp flicker quoted from the IEC technical
if the light source is not moving. In technical terms, flicker is defined as “perception of visual unsteadiness induced by a light stimulus the luminance or spectral distribution of which fluctuates with time, for a static observer in a static environment”. As a consequence, flicker is only perceptible as long as the modulation
In addition, flickering and dimming solutions based on each modulation scheme are thoroughly discussed, while new modulation techniques, such as the Asymmetric Optical Modulation, are analyzed in context with alternative highly efficient modulations schemes, such as generalized space shift keying.
Apr 13, 2024 · Visible light communication (VLC) has emerged as a transformative technology that leverages light as a carrier for wireless data transmission. This chapter delves into the fundamentals of VLC, beginning with an insightful exploration of its background and...
May 1, 2017 · Visible Light Communication (VLC) systems employ visible light for communication that occupy the spectrum from 380 nm to 750 nm corresponding to a frequency spectrum of 430 THz to 790 THz as shown in Fig. 2. The low bandwidth problem in RF communication is resolved in VLC because of the availability of the large bandwidth as illustrated in Fig. 2.
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Sep 2, 2018 · The visible light communication system is built according to the schematic diagram, as shown in Fig. 5.4a. The system’s transmission data rate is not very high, but it has laid a solid foundation for the following research work.
