Enabling Wireless Communications in the Terahertz Band

实现太赫兹频段的无线通信

• 批准号: 1608579
• 负责人: Ian Akyildiz
• 金额: $ 33万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1608579&HistoricalAwards=false
• 关键词: Enabling; Wireless; Communications; Terahertz; Band

In recent years, wireless data traffic has grown exponentially due to a change in the way today's society creates, shares and consumes information. This change has been accompanied by an increasing demand for higher speed wireless communication. Wireless Terabit-per-second links are expected to become a reality within the next ten years. Towards this aim, the Terahertz Band (0.1-10 THz) communication is envisioned as one of the key wireless technologies of the next decade. The THz band will help to overcome the spectrum scarcity problems and capacity limitations of current wireless networks, by providing an unprecedentedly large bandwidth. In addition, THz-band communication will enable a plethora of long-awaited applications ranging from instantaneous massive data transfer among nearby devices in Terabit Wireless Personal and Local Area Networks, to ultra-high-definition content streaming over mobile devices in 5G and beyond small cells. Nevertheless, there are several research challenges from the very-high and frequency-selective path loss of the THz-band channel and the very limited distance, which require innovative solutions and the revision of well-established concepts in wireless communication.This project will contribute to pave the way for the development of ultra-broadband communication in the THz band. THz technology and its applications has been recently identified by DARPA as one of the four with a potential broader impact larger than the Internet itself. Ultra-broadband communication will play a major role in the society by drastically increasing the capacity of wireless networks and enabling long-awaited applications not possible with current wireless technologies. In addition, the THz band is not yet regulated. The project team is actively involved in IEEE 802.15 Wireless Personal Area Network Terahertz Task Group, whose objective is to create the first standard for this paradigm. In this project, one graduate student will be supported, and master students (as special topic students) will be involved, to become experts in this fast evolving field. The research results will be disseminated in important, first rate scientific conferences, journals and premier magazines in the field. Moreover, the proposed solutions in this project can be tailored and are useful for the lower frequencies such as the millimeter-wave systems, which can help the development progress of 5G cellular systems.The research objective of this project is to strengthen the theoretical foundations of ultra- broadband communications in the THz band and bring the Terabit-per-second links one-step closer to reality. Our targeted breakthrough is to increase the capacity of wireless systems to reach Terabit-per-second and overcome the spectrum scarcity and capacity limitations of current wireless networks. This project will make contributions along three major thrusts. First, the concept of ultra-massive multiple-input-multiple-output is introduced to overcome the distance limitation, based on the use of the very large antenna arrays with thousands of antenna elements. The dynamic operation modes that include beamforming, spatial multiplexing and a combination of both, as well as the multi-band ultra-massive multiple-input-multiple-output will be analyzed. Second, accurate models for the three-dimensional end-to-end channel, and the three-dimensional ultra-massive multiple-input-multiple-output channel will be developed, which will provide physical insights and the guidelines for the THz band communication design. Third, by capturing the unique channel peculiarities, distance-adaptive resource allocation, and low-sampling-rate and multi-carrier synchronization schemes will be investigated for THz band communications.

近年来，由于当今社会创造、共享和消费信息的方式发生了变化，无线数据流量呈指数级增长。这种变化伴随着对高速无线通信的需求不断增长。预计每秒太比特的无线连接将在未来十年内成为现实。为了实现这一目标，太赫兹波段（0.1-10太赫兹）通信被设想为下一个十年的关键无线技术之一。太赫兹频段将通过提供前所未有的大带宽，帮助克服当前无线网络的频谱稀缺问题和容量限制。此外，太赫兹频段通信将使大量期待已久的应用成为可能，从太比特无线个人和局域网中附近设备之间的即时海量数据传输，到5G移动设备上的超高清内容流，甚至超越小型蜂窝。然而，太赫兹波段信道的高频率选择性路径损耗和非常有限的距离给研究带来了一些挑战，这需要创新的解决方案和对无线通信中成熟概念的修订。该项目将有助于为太赫兹波段超宽带通信的发展铺平道路。太赫兹技术及其应用最近被DARPA认定为四种技术之一，其潜在影响比互联网本身更广泛。超宽带通信将在社会中发挥重要作用，它大大增加了无线网络的容量，并使人们期待已久的应用在当前的无线技术下无法实现。此外，太赫兹波段还没有被调节。项目团队积极参与IEEE 802.15无线个人区域网络太赫兹任务组，该任务组的目标是为这种范例创建第一个标准。在这个项目中，将支持一名研究生，并将参与硕士生（作为专题学生），成为这个快速发展领域的专家。研究成果将在该领域重要的、一流的科学会议、期刊和主要杂志上发表。此外，该项目提出的解决方案可以量身定制，适用于毫米波系统等较低频率，有助于5G蜂窝系统的发展进程。本项目的研究目标是加强太赫兹波段超宽带通信的理论基础，使每秒太比特的链路更接近现实。我们的目标突破是将无线系统的容量提高到每秒太比特，并克服当前无线网络的频谱稀缺和容量限制。该项目将在三个主要方面作出贡献。首先，在使用具有数千个天线单元的超大天线阵列的基础上，引入了超大规模多输入多输出的概念来克服距离限制。分析了波束形成、空间复用及其组合的动态工作模式，以及多频段超大规模多输入多输出的动态工作模式。其次，建立三维端到端信道和三维超大质量多输入多输出信道的精确模型，为太赫兹波段通信设计提供物理见解和指导。第三，通过捕获独特的信道特性，研究太赫兹波段通信的距离自适应资源分配、低采样率和多载波同步方案。