[1] Andrews J G, Buzzi S, Choi W et al. What will 5G be?[J]. IEEE Journal on Selected Areas in Communications, 32, 1065-1082(2014).

[2] Ayyash M, Elgala H, Khreishah A et al. Coexistence of WiFi and LiFi toward 5G: concepts, opportunities, and challenges[J]. IEEE Communications Magazine, 54, 64-71(2016).

[3] Pan T H, Chen X B, Min C Y et al. Design of visible light-based internet of things terminal under ultralow illumination conditions[J]. Acta Optica Sinica, 40, 0706003(2020).

[4] Azim A W, le Guennec Y, Maury G. Decision-directed iterative methods for PAPR reduction in optical wireless OFDM systems[J]. Optics Communications, 389, 318-330(2017).

[5] Popoola W O, Ghassemlooy Z, Stewart B G. Pilot-assisted PAPR reduction technique for optical OFDM communication systems[J]. Journal of Lightwave Technology, 32, 1374-1382(2014).

[6] Jia K J, Hao L, Zhang S Q. Design and performance analysis of asymmetrically clipped optical multi-carrier code division multiple access system in visible light communications[J]. Acta Optica Sinica, 39, 0206001(2019).

[7] Mesleh R, Elgala H, Haas H. LED nonlinearity mitigation techniques in optical wireless OFDM communication systems[J]. IEEE/OSA Journal of Optical Communications and Networking, 4, 865-875(2012).

[8] Kashani M A, Kavehrad M. On the performance of single- and multi-carrie modulation schemes for indoor visible light communication systems[C]∥2014 IEEE Global Communications Conference, December 8-12, 2014, Austin, TX, USA., 2084-2089(2014).

[9] Ma J, He J, Chen Q H et al. A MB-CAZAC precoding combined with 128/64/32/16-QAM modulation for OFDM-VLC system[J]. Optics Communications, 424, 154-158(2018).

[10] Sheu J S, Li B J, Lain J K. LED non-linearity mitigation techniques for optical OFDM-based visible light communications[J]. IET Optoelectronics, 11, 259-264(2017).

[11] Jiang T, Tang M, Lin R et al. Investigation of DC-biased optical OFDM withprecoding matrix for visible light communications: theory, simulations, and experiments[J]. IEEE Photonics Journal, 10, 1-16(2018).

[12] Hossain M R, Ahmmed K T. BER and CCDF performance analysis of DCT-SCFDMA system using pulse shaping filter[C]∥2016 3rd International Conference on Electrical Engineering and Information Communication Technology (ICEEICT), September 22-24, 2016, Dhaka., 1-6(2016).

[13] Ouyang X, Jin J, Jin G et al. Low complexity discrete Hartley transform precoded OFDM for peak power reduction[J]. Electronics Letters, 48, 90-91(2012).

[14] Jia K J, Hao L. The design and performance analysis of optical wireless ACO-MC-CDMA system in the presence of clipping noise[J]. Science China Information Sciences, 61, 1-3(2017).

[15] Slimane S B. Reducing thepeak-to-average power ratio of OFDM signals through precoding[J]. IEEE Transactions on Vehicular Technology, 56, 686-695(2007).

[16] Armstrong J, Lowery A J. Power efficient optical OFDM[J]. Electronics Letters, 42, 370-372(2006).

[17] Armstrong J. Schmidt B J C. Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN[J]. IEEE Communications Letters, 12, 343-345(2008).

[18] Wilson S K, Armstrong J. Transmitter and receiver methods for improving asymmetrically-clipped optical OFDM[J]. IEEE Transactions on Wireless Communications, 8, 4561-4567(2009).

[19] Jia K J, Zhang S Q. Influence of multiuser interference on performances of direct-current biased optical orthogonal frequency division multiplexing code division multiple access system for visible light communication[J]. Laser & Optoelectronics Progress, 56, 110604(2019).

[20] Hou J, Ge J H, Zhai D W et al. Peak-to-average power ratio reduction of OFDM signals with nonlinear companding scheme[J]. IEEE Transactions on Broadcasting, 56, 258-262(2010).

[21] Dimitrov S, Sinanovic S, Haas H. Clipping noise in OFDM-based optical wireless communication systems[J]. IEEE Transactions on Communications, 60, 1072-1081(2012).