A Survey of Underwater Optical Wireless Communications
A Survey of Underwater Optical Wireless Communications
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DOI：
10.1109/comst.2016.2618841
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发表时间：
2017-01-01
影响因子：
35.6
通讯作者：
Cheng, Julian
中科院分区：
文献类型：
--
作者：
Zeng, Zhaoquan;Fu, Shu;Cheng, Julian
水下无线通信是指在无导航的水环境中通过无线载波进行数据传输，即，射频（RF）波、声波和光波。与射频和水声通信相比，水下光无线通信（UOWC）可以提供更高的传输带宽和数据速率。因此，本文主要研究以光波作为传输载波的超光载波通信。近年来，UOWC系统在环境监测、近海勘探、防灾和军事行动等方面有着广泛的应用前景。然而，UOWC系统也遭受由水下信道引入的严重吸收和散射。为了克服这些技术障碍，近年来人们探索了一些不同于传统地面自由空间光通信的新的系统设计方法。我们提供了一个全面和详尽的调查国家的最先进的UOWC的研究在三个方面：1）信道特性; 2）调制;和3）编码技术，连同UOWC的实际实现。
Underwater wireless communications refer to data transmission in unguided water environment through wireless carriers, i.e., radio-frequency (RF) wave, acoustic wave, and optical wave. In comparison to RF and acoustic counterparts, underwater optical wireless communication (UOWC) can provide a much higher transmission bandwidth and much higher data rate. Therefore, we focus, in this paper, on the UOWC that employs optical wave as the transmission carrier. In recent years, many potential applications of UOWC systems have been proposed for environmental monitoring, offshore exploration, disaster precaution, and military operations. However, UOWC systems also suffer from severe absorption and scattering introduced by underwater channels. In order to overcome these technical barriers, several new system design approaches, which are different from the conventional terrestrial free-space optical communication, have been explored in recent years. We provide a comprehensive and exhaustive survey of the state-of-the-art UOWC research in three aspects: 1) channel characterization; 2) modulation; and 3) coding techniques, together with the practical implementations of UOWC.