激光与光电子学进展, 2020, 57 (13): 130601, 网络出版: 2020-07-09
中远距离室外可见光通信中噪声抑制方法 下载: 1117次
Noise Suppression Method in Medium and Long Distance Outdoor Visible Light Communication
光通信 室外可见光通信系统 噪声抑制 室外信道分析 散粒噪声 optical communications outdoor visible light communication system noise suppression outdoor channel analysis shot noise
摘要
针对可见光通信(VLC)在室外传输受到强背景光干扰的问题,通过对室外强背景光环境下的可见光信道进行分析,并根据室外环境下主要干扰源为低频太阳光的特点,提出了一种基于硬件滤波的室外低频散粒噪声抑制方法。使用白光LED搭建了可达75 m的中远距离室外VLC系统,实现了室外强背景光干扰情况下的基于白光LED的低误码率点对点可靠通信。实验结果表明,该噪声抑制方法的系统误码率低于10 -5,数据传输速率可达8 Mbit/s。
Abstract
In view of the problem that visible light communication (VLC) is interfered by strong background light in outdoor transmission, this paper analyzes the visible light channel in outdoor strong background light environment, and proposes a method for suppressing low-frequency outdoor shot noise based on hardware filtering, according to the characteristic that the main interference source is low-frequency sunlight in outdoor environment. We realize the point-to-point reliable communication based on white-light LED with low bit error rate (BER) under strong background light interference. Experimental results show that the noise suppression method has a BER of less than 10 -5and a data transmission rate up to 8 Mbit/s.
武梦龙, 马富康, 刘文楷. 中远距离室外可见光通信中噪声抑制方法[J]. 激光与光电子学进展, 2020, 57(13): 130601. Menglong Wu, Fukang Ma, Wenkai Liu. Noise Suppression Method in Medium and Long Distance Outdoor Visible Light Communication[J]. Laser & Optoelectronics Progress, 2020, 57(13): 130601.