Collaborative Research: Data Communication via Particle Velocity Channels-A Paradigm Shift in Underwater Acoustic Communication

Abstract_____________________________________________________________________________________Collaborative研究：通过粒子速度通道进行数据通信--水声通信的范式转变？S地球75%以上的表面覆盖着水，有许多人类赖以生存的资源。水下传感器、深水系泊仪器、自主水下机器人和水面舰船之间利用声波进行高速无线数据通信在许多涉及国家利益的应用中具有至关重要的意义。例如近海石油工业、环境和海洋监测，以预测飓风等自然灾害，等等。然而，水声信道是一个复杂的高度带宽受限的环境，现有系统可实现的数据速率远远小于需要的数据速率，研究的核心新颖思想是通过在声场的未知自由度上进行通信来改变水声通信的基础，即声质点速度信道。在过去的几十年里，只有声场的压力通道被用于水下通信。这项研究的关键概念是利用声场的矢量分量，如声粒子速度的三个分量。由于粒子速度通道可能具有较小的时延扩展，因此在高速通信中很有希望。与传统用于水下通信的大型纯压力阵列相比，粒子速度收发器的小尺寸是另一个优势。在这项研究中，研究人员开发了一种通过声粒子速度信道进行高速水下通信的内聚框架。研究目标分为两个密切相关的类别：信道建模和收发信机设计。通道建模目标旨在了解和表征粒子速度通道，而收发机设计目标则解决在通道建模阶段遇到的新问题。

Abstract_____________________________________________________________________________________Collaborative Research: Data Communication via Particle Velocity Channels - A Paradigm Shift in Underwater Acoustic CommunicationOver 75% of the earth?s surface is covered with water, with many resources upon which human life depends. High speed wireless data communication with acoustic waves among underwater sensors, deepwater moored instruments, autonomous underwater vehicles, and surface vessels is of crucial importance in many applications of national interest. Examples include offshore oil industry, environmental and ocean monitoring to predict natural disasters such as hurricanes, and so on. However, the underwater acoustic channel is a complex and highly bandlimited environment, and the achievable data rates by current systems are much smaller than the needs.The core novel idea of the research is to transform the foundation of underwater acoustic communication, by communicating over the unexplored degrees of freedom of the acoustic field, i.e., the acoustic particle velocity channels. Over the past few decades, only the pressure channel of the acoustic field has been used for underwater communication. The key concept in this research is to take advantage of the vector components of the acoustic field, such as the three components of acoustic particle velocity. Particle velocity channels are promising for high speed communication, due to their possibly smaller delay spreads. The small size of particle velocity transceivers is another advantage over large pressure-only arrays traditionally used for underwater communication. In this research the investigators develop a cohesive framework for high rate underwater communication via acoustic particle velocity channels. The research objectives fall into two closely-related categories: channel modeling and transceiver design. Channel modeling objectives aim at understanding and characterization of particle velocity channels, whereas transceiver design objectives address new issues encountered at the channel modeling stage.