Spectrum-Efficient Hybrid Modulation Based on VOOK and Layered OFDM for Visible Light Communications

LI Baolong; SHI Jianfeng; WU Qinqin; FENG Simeng

doi:10.11999/JEIT220368

Volume 44 Issue 8

Aug. 2022

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Article Navigation > Journal of Electronics & Information Technology > 2022 > 44(8): 2639-2648

LI Baolong, SHI Jianfeng, WU Qinqin, FENG Simeng. Spectrum-Efficient Hybrid Modulation Based on VOOK and Layered OFDM for Visible Light Communications[J]. Journal of Electronics & Information Technology, 2022, 44(8): 2639-2648. doi: 10.11999/JEIT220368

Citation:

LI Baolong, SHI Jianfeng, WU Qinqin, FENG Simeng. Spectrum-Efficient Hybrid Modulation Based on VOOK and Layered OFDM for Visible Light Communications[J]. Journal of Electronics & Information Technology, 2022, 44(8): 2639-2648. doi: 10.11999/JEIT220368

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Spectrum-Efficient Hybrid Modulation Based on VOOK and Layered OFDM for Visible Light Communications

doi: 10.11999/JEIT220368

LI Baolong¹,
SHI Jianfeng^{1, 2},
WU Qinqin¹,
FENG Simeng^{3
,
,}

1.
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
2.
National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
3.
College of Electronics and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Funds: The National Natural Science Foundation of China (62001219), The Natural Science Foundation of Jiangsu Province (BK20190582, BK20210641), The Open Research Fund of National Mobile Communications Research Laboratory, Southeast University (2021D11), The Shuangchuang Talent Program of Jiangsu Province (JSSCBS20210159), The Natural Science Foundation of the Jiangsu Higher Education Institutions of China (20KJB510037)

Received Date: 2022-03-31
Accepted Date: 2022-07-13
Rev Recd Date: 2022-07-11

Available Online: 2022-07-14

Publish Date: 2022-08-17

Abstract

Abstract

In order to satisfy the requirements of illumination and high-speed transmission in Visible Light Communications (VLC), a novel spectrum-efficient hybrid modulation based on Variable On-Off Keying (VOOK) and layered Orthogonal Frequency Division Multiplexing (OFDM) is proposed in this paper. First, the VOOK signal is designed to avoid the interference with the layered OFDM transmission. In order to ensure that the hybrid signal operates in the linear dynamic range of Light-Emitting Diode (LED), a novel Reconstructed Layered Optical OFDM (RLO-OFDM) is further conceived. Then, the RLO-OFDM and VOOK signals are combined for simultaneous transmission to realize the dual functionalities of dimming control and spectrum-efficient data transmission. At the receiver side, the VOOK and RLO-OFDM signals are detected in parallel. Moreover, a standard OFDM receiver can be directly employed to detect the RLO-OFDM signal without requiring successive interference cancellation, which reduces notably the receiver complexity and processing latency. Simulation results show that the proposed scheme is capable of supporting the linear dimming control, and achieving high spectrum efficiency.
- Visible Light Communication (VLC),
- Orthogonal Frequency Division Multiplexing (OFDM),
- Dimming control,
- Variable On-Off Keying (VOOK)

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References(19)

References

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