[1] [1] Tran T A, O'Brien D C. Performance metrics for Multi-Input Multi-Output (MIMO) visible light communications[C]//Proceedings of 2012 International Workshop on Optical Wireless Communications (IWOW), 2012.

[2] [2] Wang Y G, Zhang M L, Wang Y Q, et al. Experimental demonstration of visible light communication based on sub-carrier multiplexing of multiple-input-single-output OFDM[C]//Proceedings of the 2012 17th Opto-Electronics and Communications Conference, 2012: 745-746.

[3] [3] Zhao L, Zhu T, Liu Z G, et al. An annular light source layout model for both lighting and communication reliability[J]. Opto-Electronic Engineering, 2018, 45(7): 170503.

[4] [4] Ishikawa N, Sugiura S. Maximizing constrained capacity of power-imbalanced optical wireless MIMO communications using spatial modulation[J]. Journal of Lightwave Technology, 2015, 33(2): 519-527.

[5] [5] Xue J H, Li Q, Xu S N, et al. Diversity reception system for indoor LED visible light communication[J]. Physics Experimentation, 2016, 36(9): 15-18, 22.

[6] [6] Huang N, Wang X, Chen M. Transceiver Design for MIMO VLC Systems With Integer-Forcing Receivers[J]. IEEE Journal on Selected Areas in Communications, 2018, 36(1): 66-77.

[7] [7] Narmanlioglu O, Kizilirmak R C, Miramirkhani F, et al. Effect of Wiring and Cabling Topologies on the Performance of Distributed MIMO OFDM VLC Systems[J]. IEEE Access, 2019: 52743-52754.

[8] [8] Chen J X, Wang Q, Wang Z C. Leakage-based precoding for MU-MIMO VLC systems under optical power constraint[J]. Optics Communications, 2017, 382: 348-353.

[9] [9] Hong Y, Chen J, Wang Z X. Multi-user MIMO indoor visible light communication system based on BD precoding algorithm[J]. Acta Photonica Sinica, 2013, 42(11): 1277-1282.

[10] [10] Liu Q F, Xiao S F, Huang K Z, et al. A SVD-based optical MIMO precoding scheme in indoor visible light communication[J]. International Journal of Future Computer and Communication, 2014, 3(6): 421-426.

[11] [11] Zhu K, Wang L, Hu H Y. Improved BD precoding algorithms for multi-user MIMO systems[J]. Journal of Information Engineering University, 2010, 11(1): 7-10.

[12] [12] Ding J P, Huang Z T, Ji Y F. Evolutionary algorithm based power coverage optimization for visible light communications[J]. IEEE Communications Letters, 2012, 16(4): 439-441.