[4] [4] CHI N, ZHAO Y H, SHI M, et al. Gaussian kernel-aided deep neural network equalizer utilized in underwater PAM8 visible light communication system[J]. Optics Express, 2018, 26(20): 26700-20712.

[6] [6] DISSANAYAKE S D, ARMSTRONG J. Comparison of ACO-OFDM, DCO-OFDM and ADO-OFDM in IM/DD Systems[J]. Journal of Lightwave Technology, 2013, 31(7): 1063-1072.

[8] [8] WANG J H, XU Y, LING X T, et al. PAPR analysis for OFDM visible light communication[J]. Optics Express, 2016, 24(24): 27457-27474.

[10] [10] TANG B, QIN K Y, ZHANG X Y, et al. A clipping-noise compression method to reduce PAPR of OFDM signals[J]. IEEE Communications Letters, 2019, 23(8): 1389-1392.

[13] [13] HSU C Y, LIAO H C. Generalised precoding method for PAPR reduction with low complexity in OFDM systems[J]. IET Communications, 2018, 12(7): 796-808.

[14] [14] LIU X R, ZHANG X Y, XIONG J, et al. An enhanced iterative clipping and filtering method using time-domain kernel matrix for PAPR reduction in OFDM systems[J]. IEEE Access, 2019(7): 59466-59476.