CAREER: High-Performance Ultra-Wideband Radio Design

超宽带(UWB)无线电系统正在成为高带宽数字无线通信的关键技术之一。部署UWB无线电系统的基本原理在于极宽的带宽的好处：隐蔽性(非常低的功率密度信号)、非常精确的测距(精确到几厘米)、良好的材料穿透性(在低频率)和在密集多径下的高性能(由于良好的时间分辨率)。UWB支持者的一个共同担忧是，由于要求极高的带宽、动态范围和时钟速度，可能无法实现集成的高性能无线电。这种担忧似乎导致了两条可供选择的发展道路。在第一种情况下，UWB无线电系统被缩小到在非常小的带宽下运行，这损害了UWB系统的许多好处。在这个方案中，PI提出了一种很有前景的方法，可以在不影响信号带宽的情况下，使用当今低成本的标准CMOS技术来实现集成的高性能超宽带无线电。为了满足目前远不实用的高性能UWB无线电的设计要求，他提出了一种将输入信号通道化到频率子带，然后并行处理它们的体系结构。通过对输入信号进行信道化处理，大大放宽了模拟前端和数字后端的电路要求，特别是在存在大的窄带干扰信号的情况下，本研究将证明所提出的超宽带信号接收和发送架构的可行性和有效性。他将提供一个完整的设计框架，其基础是清楚地了解各种设计选项以及相应的性能和实现复杂性方面的权衡。此外，他还将通过在硅上实现该架构来证明该架构的可行性和优势。我们的目标是设计一种高性能的单片超宽带无线电，其中的许多概念和技术并不局限于超宽带系统。它们可以推广到其他高带宽通信系统，如高速卫星和有线通信系统。基于为UWB无线电开发的技术，他计划在这个项目中追求的一个具体应用是多模无线电，这是支持多种通信标准的无线电。上述研究计划与描述PI在所有教学级别的教育动机和战略的教育计划相结合。它包括具体的计划，教学生如何学习，引入一个关于通信收发信机设计的新课程，灌输高质量的口头和书面技能，培训具有广泛技术背景的研究型学生，协助大学发起的旨在帮助邻近地区的外联计划，以及从事以社会需求为导向的应用研究。

0134629NamgoongUltra-wideband (UWB) radio systems are emerging as one of the key technologies for high bandwidth digital wireless communications. The rationale for deploying UWB radio systems lies in the benefits of exceptionally wide bandwidths: covertness (very low power density signal), very accurate ranging (down to a few centimeters), good material penetration (at low frequencies) and high performance in dense multipath (because of fine time resolution).A common concern among UWB proponents is that an integrated, high-performance radio may not be achievable, because of the extremely high bandwidth, dynamic range, and clock speeds required. Such concern appears to lead to two alternative development paths. In the first, the UWB radio system is scaled down to operate at a much reduced bandwidth, compromising much of the benefits of an UWB system. In the other, advanced process technology with numerous discrete components is employed, albeit at the expense of significantly higher cost and power consumption.In this proposal, the PI presents a promising approach to realizing an integrated high-performance UWB radio using today's low-cost standard CMOS technology without compromising the signal bandwidth. To meet the design requirements of a high-performance UWB radio, which are currently far from being practical, he proposes an architecture that channelizes the incoming signal into frequency subbands, then processes them in parallel. By channelizing the incoming signal, the circuit requirements in both the analog front-end and digital back-end are dramatically relaxed, especially when large narrowband interfering signals are present.This research will demonstrate the feasibility and effectiveness of the proposed architecture for reception and transmission of UWB signals. He will provide a complete design framework based on a clear understanding of various design options and the corresponding trade-offs in performance and implementation complexity. Furthermore, he will demonstrate the feasibility and the advantages of the proposed architecture by realizing it on silicon. The goal is to design a high-performance single-chip UWB radio.Many of the concepts and techniques developed in the proposed research are not limited to UWB systems. They can be generalized to other high-bandwidth communication systems, such as high-speed satellite and wireline communication systems. A specific application that he plans to pursue in this project based on the techniques developed for the UWB radio is multimodal radios, which are radios that support multiple communication standards.The above research plan is coupled with an education plan that describes the PI's educational motivation and strategy at all levels of teaching. It includes specific plans to teach students how to learn, introduce a new class on communication transceiver design, instill high-quality oral and written skills, train research students with broad technical backgrounds, assist with university-sponsored outreach programs aimed at helping the neighboring area, and pursue applied research that is guided by the needs of our society.