Wang Ning, Peng Xing, Kong Lingbao
Department of Ophthalmology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200080, China.
Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Micromachines (Basel). 2021 Nov 23;12(12):1434. doi: 10.3390/mi12121434.
This paper investigates a composite optical receiver for an indoor visible light communication (VLC) system. The optical gain, received power, and signal-to-noise ratio (SNR) are considered to be optimized. However, it is difficult to find a balance between them in general design and optimization. We propose the Taguchi and fuzzy logic combination method to improve multiple performance characteristics effectively in the optical receiver. The simulated results indicate that the designed receiver has the characteristics of an optical gain of 10.57, a half field of view (HFOV) of 45°, a received power of 6.4635 dBm, a signal-to-noise ratio (SNR) of 89.8874 dB, and a spot size of 2 mm. The appropriate weights of the three performance characteristics for the inputs of the fuzzy controllers increase the optical gain by 13.601 dB, and the received power and SNR by 11.097 dB and 0.373 dB, respectively. Therefore, the optical receiver optimally designed by the Taguchi and fuzzy logic methods can significantly meet the requirements of an indoor VLC system.
本文研究了一种用于室内可见光通信（VLC）系统的复合光接收器。考虑对光增益、接收功率和信噪比（SNR）进行优化。然而，在一般的设计和优化中，很难在它们之间找到平衡。我们提出了田口方法与模糊逻辑相结合的方法，以有效地改善光接收器的多种性能特性。仿真结果表明，所设计的接收器具有光增益为10.57、半视场（HFOV）为45°、接收功率为6.4635 dBm、信噪比（SNR）为89.8874 dB以及光斑尺寸为2 mm的特性。模糊控制器输入的三个性能特性的适当权重分别使光增益提高了13.601 dB，接收功率提高了11.097 dB，信噪比提高了0.373 dB。因此，通过田口方法和模糊逻辑方法优化设计的光接收器能够显著满足室内VLC系统的要求。
