EARS: Collaborative Research: Full-Duplex Cognitive Radio: A New Design Paradigm for Enhancing Spectrum Usage

EARS：协作研究：全双工认知无线电：增强频谱使用的新设计范式

• 批准号: 1547305
• 负责人: Behnaam Aazhang
• 金额: $ 20万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-10-01 至 2018-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1547305&HistoricalAwards=false
• 关键词: EARS; Collaborative; Research; Full; Duplex

With the rapid growth of demand for ever-increasing data rate, spectrum resources have become more and more scarce. As a promising technique to increase the efficiency of the spectrum utilization, cognitive radio (CR) technique has the great potential to meet such a requirement by allowing unlicensed users to coexist in licensed bands. In conventional CR systems, the spectrum sensing is performed at the beginning of each time slot before the data transmission. This unfortunately results in two major problems: 1) transmission time reduction due to sensing, and 2) sensing accuracy impairment due to data transmission. To tackle these problems, a new design for future CR is proposed by exploring the full-duplex (FD) techniques to achieve the simultaneous spectrum sensing and data transmission. The aim of this proposal is to transform the promising conceptual framework into the practical wireless network design by addressing a diverse set of transformative challenges such as protocol design and theoretical analysis. The educational plan will provide interdisciplinary training for graduate and undergraduate students. Active student involvement is ensured via mentoring, research involvement, and participation in testbed development. Outreach events targeting high school students, particularly women and minority, will be organized. Broad dissemination is guaranteed via publications, tutorials, workshops, and online tools.The proposed research aims at laying the foundations of FD CR networks via an interdisciplinary framework that synergistically marries concepts from signal processing, wireless communications, networking, and RF hardware design to yield several innovations: 1. With multiple input and multiple output (MIMO) FD radios, secondary users can simultaneously sense and access the vacant spectrum, and thus, significantly improve sensing performances and meanwhile increase data transmission efficiency. The research issue is using MIMO to jointly considering primary user receivers and FD self-interference. 2. Classic CR networks using listen-before-talk, while FD enable listen-and-talk, which can significantly improve the network performances. The research issues are to investigate the tradeoffs. 3. The classical multiple random access protocol is based on carrier sensing multiple access/collision avoidance (CSMA/CA), while FD enables collision detection (CSMA/CD). The research issue is to analyze the performances under self interference. 4. The proposed FD network protocols will be tested using WARP boards equipped with MIMO technology.

随着数据速率需求的快速增长，频谱资源变得越来越稀缺。作为一种提高频谱利用效率的有前途的技术，认知无线电（CR）技术通过允许未授权用户在授权频段中共存而具有满足这种要求的巨大潜力。在传统的CR系统中，频谱感知是在数据传输之前的每个时隙开始时执行的。不幸的是，这导致了两个主要问题：1）由于感测导致的传输时间减少，以及2）由于数据传输导致的感测精度受损。为了解决这些问题，通过探索全双工（FD）技术来实现同时频谱感知和数据传输，提出了未来CR的新设计。该提案的目的是通过解决协议设计和理论分析等各种变革性挑战，将有前途的概念框架转变为实际的无线网络设计。该教育计划将为研究生和本科生提供跨学科培训。通过指导、研究参与和参与测试平台开发来确保学生的积极参与。将组织针对高中生，特别是妇女和少数族裔的外展活动。通过出版物、教程、研讨会和在线工具保证广泛传播。拟议的研究旨在通过跨学科框架奠定 FD CR 网络的基础，该框架协同结合信号处理、无线通信、网络和射频硬件设计的概念，以产生多项创新： 1. 通过多输入多输出（MIMO）FD无线电，二级用户可以同时感知和接入空闲频谱，从而显着提高感知性能，同时提高数据传输效率。研究问题是利用MIMO来共同考虑主用户接收器和FD自干扰。 2. 经典CR网络采用先听后说的方式，而FD则采用先听后说的方式，可以显着提高网络性能。研究问题是为了调查权衡。 3. 经典的多路随机接入协议基于载波侦听多路接入/冲突避免（CSMA/CA），而FD则支持冲突检测（CSMA/CD）。研究问题是分析自干扰下的性能。 4. 拟议的 FD 网络协议将使用配备 MIMO 技术的 WARP 板进行测试。