OFDM-PWM scheme for visible light communications
Research output: Contribution to journal › Article › peer-review
Electronic versions
DOI
In this paper, we propose an improved hybrid optical orthogonal frequency division multiplexing (O-OFDM) and pulse-width modulation (PWM) scheme for visible light communications. In this scheme, a bipolar O-OFDM signal is converted into a PWM format where the leading and trailing edges convey the frame synchronization and modulated information, respectively. The proposed scheme is insensitive to the non-linearity of the light emitting diode (LED) as LEDs are switched ‘on’ and ‘off’ between two points. Therefore, the tight requirement on the high peak-to-average-power-ratio (PAPR) in O-OFDM is no longer a major issue. The simulation and experimental results demonstrate that the proposed scheme offers an improved bit error rate performance compared to the traditional asymmetrically clipped O-OFDM (ACO-OFDM).
Keywords
- Visible light communications, Pulse-width modulation, Optical orthogonal frequency division multiplexing, Peak-to-average-power-ratio
Original language | English |
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Pages (from-to) | 213-218 |
Number of pages | 6 |
Journal | Optics Communications |
Volume | 385 |
DOIs | |
Publication status | Published - 4 Nov 2016 |
Externally published | Yes |