Title :
Effectiveness of blue-filtering in WLED based indoor Visible light communication
Author :
Chun, Hyunchae ; Rajbhandari, Sujan ; Faulkner, Grahame ; O´Brien, Dominic
Author_Institution :
Dept. of Eng. Sci., Univ. of Oxford, Oxford, UK
Abstract :
Visible light communications typically uses a white LED as a data source. Most white LEDs use a slow yellow phosphor combined with a blue LED that has a faster response. An optical filter is often used to remove the slow yellow light before detection. However the need for, and effectiveness of, blue filtering is highly dependent on practical factors such as illumination level, optics gain, and receiver noise characteristics. In this paper, we model a simple indoor Visible light communication environment, and then investigate the effect of blue filtering, and how an optimum blue filter might be chosen.
Keywords :
indoor environment; light emitting diodes; optical communication equipment; optical filters; phosphors; WLED; blue LED; blue filtering; illumination level; indoor visible light communication; optical filter; optics gain; receiver noise characteristics; white LED; Filtering; Light emitting diodes; Optical filters; Phosphors; Signal to noise ratio; Thermal noise; Blue filter; Illumination; SNR; Visible Light Communications; WLEDs;
Conference_Titel :
Optical Wireless Communications (IWOW), 2014 3rd International Workshop in
Conference_Location :
Funchal
DOI :
10.1109/IWOW.2014.6950777