Arnon Shlomi, Kedar Debbie
Satellite and Wireless Communications Laboratory, Electrical and Computer Engineering Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
J Opt Soc Am A Opt Image Sci Vis. 2009 Mar;26(3):530-9. doi: 10.1364/josaa.26.000530.
The growing need for ocean observation systems has stimulated considerable interest within the research community in advancing the enabling technologies of underwater wireless communication and underwater sensor networks. Sensors and ad hoc sensor networks are the emerging tools for performing extensive data-gathering operations on land, and solutions in the subsea setting are being sought. Efficient communication from the sensors and within the network is critical, but the underwater environment is extremely challenging. Addressing the special features of underwater wireless communication in sensor networks, we propose a novel non-line-of-sight network concept in which the link is implemented by means of back-reflection of the propagating optic signal at the ocean-air interface and derive a mathematical model of the channel. Point-to-multipoint links can be achieved in an energy efficient manner and broadcast broadband communications, such as video transmissions, can be executed. We show achievable bit error rates as a function of sensor node separation and demonstrate the feasibility of this concept using state-of-the-art silicon photomultiplier detectors.
对海洋观测系统日益增长的需求激发了研究界对推进水下无线通信和水下传感器网络使能技术的浓厚兴趣。传感器和自组织传感器网络是在陆地上进行广泛数据收集操作的新兴工具，目前正在寻找海底环境的解决方案。传感器之间以及网络内部的高效通信至关重要，但水下环境极具挑战性。针对传感器网络中水下无线通信的特殊特性，我们提出了一种新颖的非视距网络概念，其中链路通过光信号在海洋 - 空气界面的反向反射来实现，并推导了该信道的数学模型。可以以节能的方式实现点对多点链路，并且可以执行诸如视频传输之类的广播宽带通信。我们展示了作为传感器节点间距函数的可实现误码率，并使用最先进的硅光电倍增管探测器证明了这一概念的可行性。
