Abstract
In this paper, we propose a new definition of the energy efficiency (EE) for indoor visible light communication (VLC) systems and further investigate the tradeoff between the EE and spectral efficiency (SE). Different from the conventional concept of the EE in wireless communication systems, the newly defined EE in VLC systems utilizes the optical communication power instead of radio frequency power to evaluate the consumed energy. Some key parameters (e.g., horizontal distance and vertical distance) in optical transmission circumstances are included when calculating the SE. The nonlinearity of light-emitting diode (LED) is also considered in the EE-SE tradeoff and such nonlinearity can be eliminated by pre-distortion. In particular, the relation between the electrical power and optical power can be derived based on the LED nonlinearity. Numerical results verify the presented EE-SE tradeoff. It is shown that the geometric parameters and the LED turn-on voltage (TOV) can significantly affect the relationship of the EE and SE.
| Original language | English |
|---|---|
| Title of host publication | 2016 IEEE/CIC International Conference on Communications in China (ICCC 2016) |
| Publisher | IEEE |
| ISBN (Electronic) | 9781509021437 |
| DOIs | |
| Publication status | Published - 24 Oct 2016 |
| Event | 2016 IEEE/CIC International Conference on Communications in China - Chengdu, China Duration: 27 Jul 2016 → 29 Jul 2016 |
Conference
| Conference | 2016 IEEE/CIC International Conference on Communications in China |
|---|---|
| Abbreviated title | ICCC 2016 |
| Country/Territory | China |
| City | Chengdu |
| Period | 27/07/16 → 29/07/16 |
Keywords
- energy efficiency
- energy-spectral efficiency tradeoff
- LED
- spectral efficiency
- VLC
ASJC Scopus subject areas
- Computer Networks and Communications
- Signal Processing
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