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Advances and prospects in visible light communications

Hongda Chen1, , Chunhui Wu1, Honglei Li1, Xiongbin Chen1, Zongyu Gao1, Shigang Cui2 and Qin Wang3

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 Corresponding author: Chen Hongda,Email:hdchen@semi.ac.cn

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Abstract: Visible light communication (VLC) is an emerging technology in optical wireless communication (OWC) that has attracted worldwide research in recent years. VLC can combine communication and illumination together, which could be applied in many application scenarios such as visible light communication local area networks (VLANs), indoor localization, and intelligent lighting. In recent years, pioneering and significant work have been made in the field of VLC. In this paper, an overview of the recent progress in VLC is presented. We also demonstrate our recent experiment results including bidirectional 100 Mbit/s VLAN or Li-Fi system based on OOK modulation without blue filter. The VLC systems that we proposed are good solutions for high-speed VLC application systems with low-cost and low-complexity. VLC technology shows a bright future due to its inherent advantages, shortage of RF spectra and ever increasing popularity of white LEDs.

Key words: white LEDsvisible light communicationoptical wireless communicationLi-Fi systemOOKequalization



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Fig. 1.  (Color online) 100 Mb/s video broadcast based on VLC system architecture and pictures of the France Telecom show room in Rennes [17, OMEGA project, 2011].

Fig. 2.  (Color online) The architecture of 4.22 Gbit/s VLC system based on RGB LEDs and hybrid time-frequency adaptive equalization algorithm[42].

Fig. 3.  (Color online) Block diagram of the experimental setup of the 5.6 Gb/s VLC system[43].

Fig. 4.  (Color online) VLC system of 662 Mb/s by a blue LED, 600Mb/s by a red LED and 520 Mb/s by a green LED based on OOK-NRZ modulation of a commercially available RGB-type white LED using pre-emphasis and post equalizing techniques[48].

Fig. 5.  (Color online) Adaptive 84.44 to 190 Mb/s white-light phosphor-LED VLC system based on 16 QAM-OFDM modulation scheme without blue filter[56].

Fig. 6.  (Color online) Experimental setup of 500 Mb/s real-time phosphor-based VLC system at the distance of 1.6 m. TIA: transimpedance amplifier; BERT: bit-error-ratio tester; PD: photodiode. Inset: pre-emphasis circuit and receiver module.

Fig. 7.  (Color online) Measured BER versus transmission data rate of 550 Mb/s VLC system at the distance of 0.6 m[52].

Fig. 8.  (Color online) EOE system response of VLC system based on proposed analog modulator (white light, blue light, blue light, blue light with pre-emphasis, and response of pre-emphasis circuit)[60].

Fig. 9.  (Color online) Measured BER versus transmission data rate (blue light without and with pre-emphasis circuit). BER below 10-10 is truncated to this threshold. Inset: Eye diagram at 100, 200, 300 and 460 Mb/s[60].

Fig. 10.  (Color online) Experimental setup of our 682 Mb/s VLC system based on 16QAM-OFDM modulation scheme without utilizing blue filter[58].

Fig. 11.  (Color online) Measured BER versus data rate of 682 Mb/s 16QAM-OFDM VLC system without blue filter[58].

Fig. 12.  (Color online) 100 Mb/s VLAN or Li-Fi demo system based on phosphorescent white LED.

Fig. 13.  (Color online) Network rate test results.

Table 1.   Recent representative research advances in VLC.

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    Received: 08 October 2015 Revised: Online: Published: 01 January 2016

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      Hongda Chen, Chunhui Wu, Honglei Li, Xiongbin Chen, Zongyu Gao, Shigang Cui, Qin Wang. Advances and prospects in visible light communications[J]. Journal of Semiconductors, 2016, 37(1): 011001. doi: 10.1088/1674-4926/37/1/011001 H D Chen, C H Wu, H L Li, X B Chen, Z Y Gao, S G Cui, Q Wang. Advances and prospects in visible light communications[J]. J. Semicond., 2016, 37(1): 011001. doi: 10.1088/1674-4926/37/1/011001.Export: BibTex EndNote
      Citation:
      Hongda Chen, Chunhui Wu, Honglei Li, Xiongbin Chen, Zongyu Gao, Shigang Cui, Qin Wang. Advances and prospects in visible light communications[J]. Journal of Semiconductors, 2016, 37(1): 011001. doi: 10.1088/1674-4926/37/1/011001

      H D Chen, C H Wu, H L Li, X B Chen, Z Y Gao, S G Cui, Q Wang. Advances and prospects in visible light communications[J]. J. Semicond., 2016, 37(1): 011001. doi: 10.1088/1674-4926/37/1/011001.
      Export: BibTex EndNote

      Advances and prospects in visible light communications

      doi: 10.1088/1674-4926/37/1/011001
      Funds:

      Project supported by the National High Technology Research and Development Program of China (Nos. 2015AA033303, 2013AA013602, 2013AA013603, 2013AA03A104), the National Natural Science Foundation of China (Nos. 61178051, 61321063, 61335010, 61178048, 61275169), and the National Basic Research Program of China (Nos. 2013CB329205, 2011CBA00608).

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      • Corresponding author: Chen Hongda,Email:hdchen@semi.ac.cn
      • Received Date: 2015-10-08
      • Published Date: 2016-01-25

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