[1] [1] NDJIONGUE A R, NGATCHED T M N, DOBRE O A, et al. VLC-based networking: feasibility and challenges[J]. IEEE Network, 2020, 34(4): 158-165.

[3] [3] KABIRU O, WASIU O. Enhanced subband index carrierless amplitude and phase modulation in visible light communication[J]. IEEE Journal of Lightwave Technology, 2019, 37: 5867-5874.

[4] [4] HU F C H, ZOU P, LI G Q et al. Enhanced performance of CAP-modulated visible light communication system utilizing geometric shaping and rotation coding[J]. IEEE Photonics Journal, 2019, 11(5): 1-13.

[5] [5] GHASSEMLOOY Z, HAYES A R, SEED N L, et al. Digital pulse interval modulation for optical communications[J]. IEEE Communications Magazine, 1998, 36(12): 95-99.

[6] [6] MORRA A E, SHALABY H M, HEGAZY S F, et al. Hybrid direct-detection differential phase shift keying-multipulse pulse position modulation techniques for optical communication systems[J]. Optics Communications, 2015, 357(12): 86-94.

[10] [10] OLANREWAJU H G, THOMPSON J, POPOOLA W O. Generalized spatial pulse position modulation for optical wireless communications[C]// 2016 IEEE 84th Vehicular Technology Conference(VTC-Fall), September 18-21, 2016, Montreal, Canada. Piscataway: IEEE, 2016: 1-5.

[11] [11] MESLEH R, ELGALA H, HAAS H. Optical spatial modulation[J]. Journal of Optical Communications and Networking, 2011, 3(3): 234-244.

[12] [12] ATHANASIOS S, HAAS H. Performance evaluation of space modulation techniques in VLC systems[C]//International Conference on Communication Workshop(ICCW), June 8-12, 2015, London, UK. Piscataway: IEEE, 2015: 1356-1361.

[13] [13] XU K, YU H Y, ZHU Y J. Channel-adapted spatial modulation for massive MIMO visible light communications[J]. IEEE Photonics Technology Letters, 2016, 28(23): 2693-2696.

[14] [14] BAO J J, HSU C L, TU J F. An efficient data transmission with GSM-MPAPM modulation for an indoor VLC system[J]. Symmetry, 2019, 11(10): 1-13.