Abstract
In conventional dimming control systems utilizing pulse width modulation (PWM) scheme, when duty cycle is reduced the receiver sensitivity requirement will be increased to keep data rate constant, which makes it hard to achieve errorfree transmission. In this paper, we investigate a new mechanism of dimming control by reducing the transmitted data rate to adapt for receiver sensitivity. The mechanism can keep transmitted data rate maximum while satisfying communication quality. In order to compensate for the increased receiver sensitivity, we propose a new dimming control method combining adaptive M-QAM orthogonal frequency division multiplexing (OFDM) signals and multi-pulse position modulation (MPPM) light pulse. By utilizing the pattern effect of MPPM, excess information bits can be transmitted and thus both the symbol rate of M-QAM symbols and the receiver sensitivity requirement can be reduced, which makes error-free transmission at high data rate easier to be implemented.
| Original language | English |
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| Title of host publication | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 |
| Publisher | IEEE |
| Pages | 268-272 |
| Number of pages | 5 |
| ISBN (Electronic) | 9781479958320 |
| DOIs | |
| Publication status | Published - 27 Jan 2014 |
| Externally published | Yes |
| Event | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 - Macau, China Duration: 19 Nov 2014 → 21 Nov 2014 |
Conference
| Conference | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 |
|---|---|
| Country/Territory | China |
| City | Macau |
| Period | 19/11/14 → 21/11/14 |
Keywords
- Dimming control
- MPPM
- OFDM
- Sensitivity requirement
- Visible light communication
ASJC Scopus subject areas
- Computer Networks and Communications
- Information Systems