TY - JOUR
T1 - OFDM-PWM scheme for visible light communications
AU - Zhang, Tian
AU - Ghassemlooy, Zabih
AU - Rajbhandari, Sujan
AU - Popoola, Wasiu
AU - Guo, Shuxu
PY - 2017/2/15
Y1 - 2017/2/15
N2 - 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).
AB - 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).
KW - Visible light communications
KW - Pulse-width modulation
KW - Optical orthogonal frequency division multiplexing
KW - Peak-to-average-power-ratio
U2 - 10.1016/j.optcom.2016.10.038
DO - 10.1016/j.optcom.2016.10.038
M3 - Article
VL - 385
SP - 213
EP - 218
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
ER -