摘要
水下可见光通信(UVLC)作为水下无线通信技术的一个重要分支,在海洋环境监测与水下军事斗争等领域有着十分广泛的应用。文章首先简单介绍了UVLC的研究背景、意义及难点,接着从光学衰减建模、垂直信道建模与湍流信道建模3个角度对水下可见光信道建模技术进行综述,并调查了水下可见光不同调制技术相关的研究成果。由分析可知,一方面,UVLC在水平方向上的光学衰减建模趋于完善,目前还未建立准确且完整的水下可见光湍流与垂直信道模型;另一方面,强度调制在水下可见光调制技术中占据主流,相干调制则通常用于提高系统的可靠性。最后分别从构建UVLC网络和自适应调制编码的角度对未来UVLC可能的发展方向进行了论述。
Underwater Visible Light Communication(UVLC), as an important branch of underwater wireless communication technology, is widely used in the field of marine environmental monitoring and underwater military struggle. This paper first briefly introduces the research background, significance and difficulties of UVLC. Then we summarize the underwater visible light channel modeling technology from three aspects including optical attenuation modeling, vertical channel modeling and turbulence channel modeling. Finally, we investigate the research results related to different underwater visible light modulation technologies. It can be seen from the analysis that the modeling of optical attenuation in the horizontal direction of UVLC tends to be perfect. At present, there is no accurate and complete model of underwater visible light turbulence and vertical channel. On the other hand, intensity modulation is the mainstream in underwater visible light modulation technology, while coherent modulation is usually used to improve the reliability of the system. The possible development direction of UVLC in the future is also discussed from the perspective of constructing UVLC network and adaptive modulation coding.
作者
郭银景
徐锋
屈衍玺
鲍建康
吕文红
GUO Yin-jing;XU Feng;QU Yan-xi;BAO Jian-kang;LüWen-hong(College of Electronic&Information Engineering,Shandong University of Science and Technology,Qingdao 266590,China;College of Electrical Engineering&Automation,Shandong University of Science and Technology,Qingdao 266590,China;College of Transportation,Shandong University of Science and Technology,Qingdao 266590,China;Qingdao Intelligence Ocean Technology Co.,Ltd.,Qingdao 266590,China)
出处
《光通信研究》
北大核心
2020年第2期1-6,19,共7页
Study on Optical Communications
基金
国家自然科学基金资助项目(61471224)
山东省重点研发计划(公益类专项)资助项目(2018GHY115022)。
关键词
水下
可见光通信
信道建模
信号调制
underwater
visible light communication
channel modeling
signal modulation
