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.

海洋覆盖了地球表面的71%，是人类探索最少的领域之一，但海洋对气候调节、营养生产、石油开采和运输都是不可或缺的。未来为更好地了解海洋和与水有关的应用而进行的科学和技术努力，将在很大程度上依赖于我们在各种仪器、车辆（有人驾驶和无人驾驶）、操作人员、平台和传感器之间进行可靠通信的能力。这种水下网络的粘合剂将是水下声学通信链路。 尽管最近在声学物理层单链路上开展了活动，但与基于无线电的陆地无线通信的类似努力相比，数字声学通信仍处于起步阶段。 该项目利用水声信道的独特功能，显着提高水下网络的性能。 研究的重点是在这种宽带环境中的固有的多尺度，多径信道的设计。令人惊讶的是，收发器设计的宽带信道和不同的多普勒尺度的实际水下通信系统的耦合的努力似乎没有得到彻底的研究。 从单个链路到多个节点的整个网络的角度来研究网络，包括新颖的多尺度，多滞后信道建模，波形设计，均衡器设计，信道估计，单链路和网络容量评估，新颖的编码，以实现容量，以及在大规模网络上的信令和路由。在一个原则性的方式，多尺度，多径信道的基本属性进行了探索，以设计和分析高性能的水声网络。可实现的算法的设计，奋进实现的基本限制。研究成果还将影响超声波、超宽带、宽带雷达、声纳、声信号处理以及中高速车对车（V2V）通信，并可能影响对生物声纳的理解。