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陈雄斌, 闵成彧. 看得见的无线通信技术——可见光通信[J]. 物理, 2020, 49(10): 688-696. DOI: 10.7693/wl20201005
引用本文: 陈雄斌, 闵成彧. 看得见的无线通信技术——可见光通信[J]. 物理, 2020, 49(10): 688-696. DOI: 10.7693/wl20201005
CHEN Xiong-Bin, Min Cheng-Yu. Wireless communication that we can see——visible light communication[J]. PHYSICS, 2020, 49(10): 688-696. DOI: 10.7693/wl20201005
Citation: CHEN Xiong-Bin, Min Cheng-Yu. Wireless communication that we can see——visible light communication[J]. PHYSICS, 2020, 49(10): 688-696. DOI: 10.7693/wl20201005

看得见的无线通信技术——可见光通信

Wireless communication that we can see——visible light communication

  • 摘要: 可见光通信作为新一代信息技术,除了为移动通信拓展频谱资源外,还具备高速、大容量、安全、节能的技术特点。现有射频通信的5G、6G技术方案能耗很高,而照明、显示用的LED已经无处不在,所以可见光通信将来可用于实现普适的万物光互连。商用照明的荧光型 LED器件的带宽有限,通过均衡技术已经把可见光通信系统的3 dB带宽拓展到了600 MHz,单路二进制开关键控实时通信速率达到了1.39 Gbps。如果采用高阶调制和波分复用技术,多色LED光源的非实时通信总速率已经超过15 Gbps。灯光上网、灯光定位和智能家居系统等创新应用证明了可见光通信与照明或显示融合不是梦,预示看得见的光无线通信将引起更大的技术变革。

     

    Abstract: As a new generation of information technology, visible light communication not only expands the spectral resources for mobile telecommunication, but also has the characteristics of high speed, large capacity, security, and low energy consumption. The 5G and 6G technologies of wireless networks consume a great amount of energy, while light emitting diodes (LEDs) for lighting and display are everywhere, so visible light communication can be used to realize universal optical interconnection in the future. Although the bandwidth of fluorescent LED devices for commercial lighting is limited, the 3 dB bandwidth of visible light communication systems has been extended to 600 MHz through equalization technology, and the real-time communication rate of single on-off keying channels has been increased to 1.39 Gbps. If highorder modulation and wavelength division multiplexing technology are used, the total non- realtime communication rate of multi-color LED light sources can exceed 15 Gbps. Innovative applications such as visible light internet access, visible light positioning and smart home systems prove that the integration of visible light communication with lighting or displays is not a dream, and signify that visible optical wireless communication will bring about an even greater technological revolution.

     

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