Huang Xuan, Yang Fang, Pan Changyong, Song Jian
Opt Express. 2021 Feb 15;29(4):5645-5657. doi: 10.1364/OE.420848.
In this paper, a flexible non-orthogonal multiple access (NOMA) based optical orthogonal frequency division multiplexing (OFDM) modulation scheme, called non-orthogonal hybrid optical OFDM (NOHO-OFDM), is proposed to increase the achievable data rate of the visible light communication system with high efficiency. In addition, a receiver with iteratively successive interference cancellation (ISIC) is investigated, which can reduce the estimation error. Then, the achievable data rate of the proposed NOHO-OFDM with the ISIC scheme is analyzed. Experiment results show that the bit error rate of the NOHO-OFDM can be significantly reduced by the proposed ISIC scheme, and the NOHO-OFDM is superior than the orthogonal scheme in terms of data rates. Meanwhile, simulation results show that the achievable data rate region of the proposed NOHO-OFDM scheme is larger than that of the orthogonal counterpart.
本文提出了一种基于灵活非正交多址接入（NOMA）的光正交频分复用（OFDM）调制方案，称为非正交混合光OFDM（NOHO-OFDM），以高效提高可见光通信系统的可达数据速率。此外，还研究了一种具有迭代连续干扰消除（ISIC）的接收机，其可以减少估计误差。然后，分析了采用ISIC方案的所提出的NOHO-OFDM的可达数据速率。实验结果表明，所提出的ISIC方案可以显著降低NOHO-OFDM的误码率，并且在数据速率方面，NOHO-OFDM优于正交方案。同时，仿真结果表明，所提出的NOHO-OFDM方案的可达数据速率区域大于正交方案的可达数据速率区域。
