Red-shift effect in multi-color LEDs based visible light communication
| Autor: | Emin Tugcu, Kadir Turk, Ayhan Yazgan, Cenk Albayrak |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Optical communication Visible light communication Spectral density Keying 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Power (physics) law.invention 010309 optics Optics law 0103 physical sciences Junction temperature Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business Data transmission Light-emitting diode |
| Zdroj: | Optics Communications. 463:125451 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2020.125451 |
| Popis: | Visible light communication (VLC) is a short range wireless optical communication system that provides lighting and data transmission, simultaneously. Besides lighting, in order to obtain high data rates, color-shift keying (CSK) which modulates the intensity of light using multi-color light emitting diodes (LEDs) has been introduced in IEEE 802.15.7 VLC standard. In CSK-based VLC (VLC-CSK) systems, some parameters of LEDs such as junction temperature is affected by physical and operation conditions. Junction temperature variations change the power spectral density (PSD) of LEDs, which is known as red-shift effect. In this study, the red-shift effect is examined for the first-time in VLC-CSK systems. The obtained numerical results show that the red-shift effect may dramatically reduce the performance of optical communication system. To eliminate the negative effect of red-shift, an effective solution based on the power normalization is proposed at the receiver side. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect