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Title: Efficient indoor data transmission with full dimming control in hybrid visible light/infrared communication systems
Authors: You, XD 
Chen, J
Yu, CY 
Keywords: Visible light communication (VLC)
Infrared (IR) communication
Dimming control
Hybrid transmission
Orthogonal frequency division multiplexing (OFDM)
Multi-pulse position modulation (MPPM)
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE access, 2018, v. 6, p. 77675-77684 How to cite?
Journal: IEEE access 
Abstract: We design a hybrid visible light (VL) and infrared (IR) data transmission scheme for indoor visible light communication (VLC) systems with multi-pulse position modulation (MPPM) dimming control. A low-power IR light-emitting diode is adopted to assist the VL downlink especially when the dimming level of VL is low. Both VL and IR orthogonal frequency division multiplexing signals are transmitted alternately during the "on" and "off" periods of MPPM dimming controlled pulses. In this way, MPPM "off" periods can be efficiently utilized to convey data information without affecting illumination level. This arrangement ensures reliable data transmission under all illumination conditions including dark scenario. Numerical results show that the additional IR link can always facilitate the use of low M-ary quadrature amplitude modulation (M-QAM) levels. The fluctuation of required M-QAM symbol rates caused by dimming control can also be mitigated. At low dimming levels, both the receiver sensitivity requirement for the VL link and the total required transmit power can be significantly alleviated while maintaining a constant data rate at BER < 10(-3). Even with limited launching power, the proposed scheme can still extend dimming control range while achieving stable and reliable transmission quality effectively.
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2018.2883750
Rights: © 2018 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See for more information.
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The following publication You, X. D., Chen, J., & Yu, C. Y. (2018). Efficient indoor data transmission with full dimming control in hybrid visible light/infrared communication systems. IEEE Access, 6, 77675-77684 is available at
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