Quasi-omnidirectional transmitter for underwater wireless optical communication systems using a prismatic array of three high-power blue LED modules.
Quasi-omnidirectional transmitter for underwater wireless optical communication systems using a prismatic array of three high-power blue LED modules.
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DOI：
10.1364/oe.429974
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发表时间：
2021-06
期刊：
影响因子：
3.8
通讯作者：
Zhijian Tong;Xingqi Yang;Xiao Chen;Hao Zhang;Yufan Zhang;Haiwu Zou;Lyufang Zhao;Jing Xu
中科院分区：
文献类型：
--
作者：
Zhijian Tong;Xingqi Yang;Xiao Chen;Hao Zhang;Yufan Zhang;Haiwu Zou;Lyufang Zhao;Jing Xu
本研究采用三个均匀分布的大功率LED模块组成的棱镜阵列作为发射机，实现了一种准全向水下无线光通信系统。在50m标准游泳池的10m水下信道上，在不采用任何数字信号处理算法的情况下，获得了22 Mbps的数据速率。在基于迫零(ZF)的频域均衡(FDE)和最大比合并(MRC)算法下，在10m、30m和40m水下信道上获得的最大净数据速率分别为69.65 Mbps、39.8 Mbps和29.85 Mbps。在所提出的UWOC系统中，接收机可以成功捕获来自发射机的不同方向的光信号，并且在不同方向上测量的误码率(BERS)显示出微小的波动。该系统可以满足群体机器人系统中单元间的高速数据传输和水下光蜂窝网络系统中最后一米用户接入的需求。
In this study, a quasi-omnidirectional underwater wireless optical communication (UWOC) system is implemented with a prismatic array consisting of three uniformly distributed high-power LED modules as the transmitter. Over a 10-m underwater channel in a 50-m standard swimming pool, a data rate of 22 Mbps is achieved without adopting any digital signal processing algorithm. With zero forcing (ZF) based frequency domain equalization (FDE) and a maximum ratio combining (MRC) algorithm, the maximum net data rates achieved are 69.65 Mbps, 39.8 Mbps and 29.85 Mbps over 10-m, 30-m, and 40-m underwater channels, respectively. In the proposed UWOC system, the receiver could successfully capture optical signals at different directions from the transmitter and the bit error rates (BERs) measured in different directions show small fluctuations. The proposed system could meet the demands of high-speed data transmission among units in a swarm-robot system and last meter user access in an underwater optical cellular network system.