The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Hongda Chen - One of the best experts on this subject based on the ideXlab platform.
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an analog modulator for 460 mb s visible light data transmission based on ook nrs modulation
IEEE Wireless Communications, 2015Co-Authors: Xiongbin Chen, Junqing Guo, Zongyu Gao, Hongda ChenAbstract:This article describes an analog modulator that contains modulation, a MOSFET drive, and pre-emphasis circuits for a high-speed VLC application system based on a commercial phosphorescent white LED. We propose a small signal modulation model that is implemented by an AC-coupled N-channel MOSFET circuit and present a pre-emphasis circuit to enhance the 3 Db Bandwidth of a VLC link. Utilizing our proposed analog modulator combined with blue filtering, the 3 Db Bandwidth of a VLC system could be extended from 3 to 175 MHz, which allows OOK-NRZ data transmission up to 460 Mb/s with BER below 10–9 under a 1 m radial distance. With a simple analog modulator based on the simplest OOK-NRZ modulation scheme, a high-speed VLC system could be realized. The VLC link with the proposed analog modulator is a good solution for a high-speed low-complexity and low-cost practical VLC application system.
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a 550 mbit s real time visible light communication system based on phosphorescent white light led for practical high speed low complexity application
Optics Express, 2014Co-Authors: Xiongbin Chen, Junqing Guo, Hongda ChenAbstract:In this paper, we first experimentally demonstrate a 550 Mbit/s real-time visible light communication (VLC) system based on nonreturn-to-zero on-off keying (NRZ-OOK) modulation of a commercial phosphorescent white light LED. The 3-Db modulation Bandwidth of such devices is only a few megahertz. We proposed an analog pre-emphasis circuit based on NPN transistors and an active post-equalization circuit based on an amplifier to enhance the 3-Db Bandwidth of VLC link. Utilizing our proposed pre-emphasis and post-equalization circuits, the 3-Db Bandwidth of VLC link could be extended from 3 to 233 MHz with blue-filter, to the best of our knowledge, which is the highest ever achieved in VLC systems reported. The achieved data rate was 550 Mbit/s at the distance of 60 cm and the resultant bit-error-ratio (BER) was 2.6 × 10−9. When the VLC link operated at 160 cm, the data rate was 480 Mbit/s with 2.3 × 10−7 of BER. Our proposed VLC system is a good solution for high-speed low-complexity application.
Peng Guo - One of the best experts on this subject based on the ideXlab platform.
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gb s real time visible light communication system based on white leds using t bridge cascaded pre equalization circuit
IEEE Photonics Journal, 2018Co-Authors: Haiqi Zhang, Aiying Yang, Lihui Feng, Peng GuoAbstract:We demonstrate a Gb/s real-time visible light communication (VLC) system based on NRZ-OOK by a phosphorescent white light-emitting diode (LED). We propose an equalizer employed by an RC series-parallel connection cascade circuit based on the T-bridge structure. With the proposed circuit, the 3-Db Bandwidth of the VLC system can be extended from 1 to 520 MHz. The Bit Error Ratio (BER) of the system was $7.36 \times 10^{-4}$ , and the data rate was 1 Gb/s at a distance of 1.5 m. To the best of our knowledge, this is the highest real-time data rate and 3-Db Bandwidth achieved based on a white LED.
Xiongbin Chen - One of the best experts on this subject based on the ideXlab platform.
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an analog modulator for 460 mb s visible light data transmission based on ook nrs modulation
IEEE Wireless Communications, 2015Co-Authors: Xiongbin Chen, Junqing Guo, Zongyu Gao, Hongda ChenAbstract:This article describes an analog modulator that contains modulation, a MOSFET drive, and pre-emphasis circuits for a high-speed VLC application system based on a commercial phosphorescent white LED. We propose a small signal modulation model that is implemented by an AC-coupled N-channel MOSFET circuit and present a pre-emphasis circuit to enhance the 3 Db Bandwidth of a VLC link. Utilizing our proposed analog modulator combined with blue filtering, the 3 Db Bandwidth of a VLC system could be extended from 3 to 175 MHz, which allows OOK-NRZ data transmission up to 460 Mb/s with BER below 10–9 under a 1 m radial distance. With a simple analog modulator based on the simplest OOK-NRZ modulation scheme, a high-speed VLC system could be realized. The VLC link with the proposed analog modulator is a good solution for a high-speed low-complexity and low-cost practical VLC application system.
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a 550 mbit s real time visible light communication system based on phosphorescent white light led for practical high speed low complexity application
Optics Express, 2014Co-Authors: Xiongbin Chen, Junqing Guo, Hongda ChenAbstract:In this paper, we first experimentally demonstrate a 550 Mbit/s real-time visible light communication (VLC) system based on nonreturn-to-zero on-off keying (NRZ-OOK) modulation of a commercial phosphorescent white light LED. The 3-Db modulation Bandwidth of such devices is only a few megahertz. We proposed an analog pre-emphasis circuit based on NPN transistors and an active post-equalization circuit based on an amplifier to enhance the 3-Db Bandwidth of VLC link. Utilizing our proposed pre-emphasis and post-equalization circuits, the 3-Db Bandwidth of VLC link could be extended from 3 to 233 MHz with blue-filter, to the best of our knowledge, which is the highest ever achieved in VLC systems reported. The achieved data rate was 550 Mbit/s at the distance of 60 cm and the resultant bit-error-ratio (BER) was 2.6 × 10−9. When the VLC link operated at 160 cm, the data rate was 480 Mbit/s with 2.3 × 10−7 of BER. Our proposed VLC system is a good solution for high-speed low-complexity application.
Haiqi Zhang - One of the best experts on this subject based on the ideXlab platform.
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gb s real time visible light communication system based on white leds using t bridge cascaded pre equalization circuit
IEEE Photonics Journal, 2018Co-Authors: Haiqi Zhang, Aiying Yang, Lihui Feng, Peng GuoAbstract:We demonstrate a Gb/s real-time visible light communication (VLC) system based on NRZ-OOK by a phosphorescent white light-emitting diode (LED). We propose an equalizer employed by an RC series-parallel connection cascade circuit based on the T-bridge structure. With the proposed circuit, the 3-Db Bandwidth of the VLC system can be extended from 1 to 520 MHz. The Bit Error Ratio (BER) of the system was $7.36 \times 10^{-4}$ , and the data rate was 1 Gb/s at a distance of 1.5 m. To the best of our knowledge, this is the highest real-time data rate and 3-Db Bandwidth achieved based on a white LED.
Junqing Guo - One of the best experts on this subject based on the ideXlab platform.
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an analog modulator for 460 mb s visible light data transmission based on ook nrs modulation
IEEE Wireless Communications, 2015Co-Authors: Xiongbin Chen, Junqing Guo, Zongyu Gao, Hongda ChenAbstract:This article describes an analog modulator that contains modulation, a MOSFET drive, and pre-emphasis circuits for a high-speed VLC application system based on a commercial phosphorescent white LED. We propose a small signal modulation model that is implemented by an AC-coupled N-channel MOSFET circuit and present a pre-emphasis circuit to enhance the 3 Db Bandwidth of a VLC link. Utilizing our proposed analog modulator combined with blue filtering, the 3 Db Bandwidth of a VLC system could be extended from 3 to 175 MHz, which allows OOK-NRZ data transmission up to 460 Mb/s with BER below 10–9 under a 1 m radial distance. With a simple analog modulator based on the simplest OOK-NRZ modulation scheme, a high-speed VLC system could be realized. The VLC link with the proposed analog modulator is a good solution for a high-speed low-complexity and low-cost practical VLC application system.
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a 550 mbit s real time visible light communication system based on phosphorescent white light led for practical high speed low complexity application
Optics Express, 2014Co-Authors: Xiongbin Chen, Junqing Guo, Hongda ChenAbstract:In this paper, we first experimentally demonstrate a 550 Mbit/s real-time visible light communication (VLC) system based on nonreturn-to-zero on-off keying (NRZ-OOK) modulation of a commercial phosphorescent white light LED. The 3-Db modulation Bandwidth of such devices is only a few megahertz. We proposed an analog pre-emphasis circuit based on NPN transistors and an active post-equalization circuit based on an amplifier to enhance the 3-Db Bandwidth of VLC link. Utilizing our proposed pre-emphasis and post-equalization circuits, the 3-Db Bandwidth of VLC link could be extended from 3 to 233 MHz with blue-filter, to the best of our knowledge, which is the highest ever achieved in VLC systems reported. The achieved data rate was 550 Mbit/s at the distance of 60 cm and the resultant bit-error-ratio (BER) was 2.6 × 10−9. When the VLC link operated at 160 cm, the data rate was 480 Mbit/s with 2.3 × 10−7 of BER. Our proposed VLC system is a good solution for high-speed low-complexity application.