[2] [2] AN J, CHUNG W Y. Single-LED multichannel optical transmission with SCMA for long range health information monitoring[J]. Journal of Lightwave Technology, 2018, 36(23): 5470-5480.

[3] [3] KOUHINI S M, MANA S M, FREUND R, et al. Distributed MIMO experiment using LiFi over plastic optical fiber[C]// IEEE. Proceedings of 2020 IEEE Globecom Workshops (GC Wkshps). Hawaii: IEEE, 2020: 1-6.

[4] [4] MANA S M, KOUHINI S M, HELLWIG P, et al. Distributed MIMO experiments for LiFi in a conference room[C]// IEEE. Proceedings of 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP). Bali: IEEE, 2020: 1-5.

[5] [5] KOMINE T, NAKAGAWA M. Fundamental analysis for visible-light communication system using LED lights[J]. IEEE Transactions on Consumer Electronics, 2004, 50(1): 100-107.

[6] [6] FATH T, HAAS H. Performance comparison of MIMO techniques for optical wireless communications in indoor environments [J]. IEEE Transactions on Communications, 2004, 61(2): 733-742.

[7] [7] TRAN N A, LUONG D A, THANG T C, et al. Performance analysis of indoor MIMO visible light communication systems [C]// IEEE. Proceedings of 2014 IEEE Fifth International Conference on Communications and Electronics (ICCE). Danang: IEEE, 2014: 60-64.

[8] [8] DING J P, I Chih-Lin, XU Z Y. Indoor optical wireless channel characteristics with distinct source radiation patterns[J]. IEEE Photonics Journal, 2016, 8(1): 1-15.

[9] [9] VOLKER J, PABLO W B, ZSREELAL M, et al. LiFi for industrial wireless applications[C]// OSA. Proceedings of 2020 Optical Fiber Communications Conference and Exhibition (OFC). San Diego: OSA, 2020: 1-3.

[10] [10] TELI S R, ZVANOVEC S, GHASSEMLOOY Z. Optical internet of things within 5G: applications and challenges [C]// IEEE. Proceedings of 2018 IEEE International Conference on Internet of Things and Intelligence System (IOTAIS). Bali: IEEE, 2018: 40-45.

[11] [11] BERENGUER P W, SCHULZ D, HILT J, et al. Optical wireless MIMO experiments in an industrial environment [J]. IEEE Journal on Selected Areas in Communications, 2018, 36(1): 185-193.

[12] [12] MAJEED K, HRANILOVIC S. Performance bounds on passive indoor positioning using visible light [J]. Journal of Lightwave Technology, 2020, 38(8): 2190-2200.

[13] [13] DING J P, I Chih-Lin, ZHANG H, et al. Cells planning of VLC networks using non-circular symmetric optical beam[C]// IEEE. Proceedings of 2019 IEEE International Conference on Communications (ICC). Shanghai: IEEE, 2019: 1-6.

[14] [14] DING J P, I Chih-Lin, XIE R Y, et al. Actual radiation patterns-oriented non-deterministic optical wireless channel characterization[C]// Springer. Proceedings of 13th Chinese Conference on Biometric Recognition (CCBR 2018). Urumqi: Springer, 2018: 517-527.

[16] [16] DING J P, I Chih-Lin, ZHANG C, et al. Evaluation of outdoor visible light communications links using actual LED street luminaries[C]// Springer. Proceedings of 13th Chinese Conference on Biometric Recognition (CCBR 2018). Urumqi: Springer, 2018: 572-579.

[17] [17] MORENO I, SUN C. Modeling the radiation pattern of LEDs[J]. Optics Express, 2008, 16(3): 1808-1819.

[18] [18] SHANG W, KAI W, FEI C, et al. Design of primary optics for LED chip array in road lighting application[J]. Optics Express, 2011, 19(14): A716-A724.

[19] [19] LEE X H, MORENO I, SUN C C. High-performance LED street lighting using microlens arrays[J]. Optics Express, 2013, 21(9): 10612-10621.