基于光电池探测器的可见光通信系统无线供能技术研究

Analysis of Wireless Energy Harvesting Technology in Visible Light Communication System Based on Photocell Detector

采用硅光电池阵列作为接收机探测器,在Matlab/Simulink环境中建立了可见光通信(VLC)系统模型,对硅光电池阵列的U-I特性和输出功率特性进行了仿真研究,同时研究了结电容和光照度对硅光电池响应带宽的影响。研究结果表明硅光电池结电容越小,响应带宽越大,硅光电池结电容为2pF时,响应带宽最大可为10MHz,满足无线通信和无线供能复用的可见光通信系统应用要求。

In this paper,silicon photocell array was used as the detector for the receiver to establish a visible light communication（VLC）system model in Matlab/Simulink environment.The U-I and output power characteristics of silicon photocell array were studied through simulation,meanwhile,the effects of junction capacitance and illumination value on the response bandwidth were analyzed.The results show that smaller junction capacitance results in greater response bandwidth of silicon photocell.When the junction capacitance is 2pf,the maximum response bandwidth can reach 10 MHz,which can satisfy the application requirements of visible light communication system for wireless communication and wireless energy harvesting simultaneously.