CIF: Small: Multiscale Methods for Mobile Underwater Networks

CIF：小型：移动水下网络的多尺度方法

• 批准号: 1117896
• 负责人: Urbashi Mitra
• 金额: $ 47.93万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1117896&HistoricalAwards=false
• 关键词: CIF; Small; Multiscale; Methods; Mobile

The oceans cover 71% of the earth's surface and represent one of the least explored frontiers, yet the oceans are integral to climate regulation, nutrient production, oil retrieval, and transportation. Future scientific and technological efforts to achieve better understanding of oceans and water-related applications will rely heavily on our ability to communicate reliably between instruments, vehicles (manned and unmanned), human operators, platforms, and sensors of all types. The glue of such underwater networks will be the underwater acoustic communication link. Despite recent activity on acoustic physical layer single-links, digital acoustic communication is in its infancy in comparison to comparable efforts for radio-based terrestrial wireless communication. This project exploits the unique features of the underwater acoustic channel to significantly improve performance of underwater networks. The research focus is on design for the inherently multi-scale, multipath channels in this wideband environment. Surprisingly, transceiver design for the coupled efforts of wideband channels and distinct Doppler scales for practical underwater communication systems does not appear to have been thoroughly investigated. The network is examined from the perspective of individual links up to entire networks of multiple nodes, encompassing novel multi-scale, multi-lag channel modeling, waveform design, equalizer designs, channel estimation, single-link and network capacity evaluation, novel coding to achieve capacity, as well as signaling and routing over large-scale networks. In a principled manner, the fundamental properties of multi-scale, multipath channels are explored in order to design and analyze high performance underwater acoustic networks. Implementable algorithms are designed which endeavor to achieve the fundamental limits. The research outcomes will also impact ultrasound, ultrawideband, wideband radar, sonar, acoustic signal processing, and moderate to high speed vehicle-to-vehicle (V2V) communication and possibly understanding of biosonar.

海洋占地71％，是探索最少的边界之一，但海洋是气候调节，营养生产，油的检索和运输不可或缺的一部分。未来的科学和技术努力以更好地了解海洋和与水相关的应用将在很大程度上取决于我们在工具，车辆（人手和无人驾驶），人类操作员，平台和各种类型的传感器之间可靠地沟通的能力。这种水下网络的胶水将是水下声学通信连接。 尽管最近在声学物理层单链路上进行了活动，但与基于无线电的无线无线通信的可比努力相比，数字声学通信仍处于起步阶段。 该项目利用了水下声学通道的独特功能，可以显着提高水下网络的性能。 研究重点是在这个宽带环境中固有的多尺度多路径通道的设计。令人惊讶的是，似乎尚未对宽带通道的耦合努力和实用水下通信系统的不同多普勒量表进行耦合。 从单个链接的角度来检查该网络，直至多个节点的整个网络，包括新型的多尺度，多层频道建模，波形设计，均衡器设计，均衡器设计，通道估计，单网链和网络容量评估，新颖的编码，可实现容量，以及大型网络上的信号和路由。以原则上的方式探索了多尺度，多尺度通道的基本属性，以设计和分析高性能的水下声学网络。可实施的算法设计为实现基本限制的努力。研究结果还将影响超声，超大带，宽带雷达，声纳，声信号处理，以及中度至高速车辆到车辆（V2V）的通信以及可能对生物纳尔的了解。