CAREER: High-Performance Ultra-Wideband Radio Design

超宽带（UWB）无线电系统是新兴的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异常宽的带宽的好处：覆盖性（非常低的功率密度信号），非常精确的测距（低至几厘米），良好的材料穿透性（低频）和高密度多径的高性能（由于精细的时间分辨率）。UWB支持者的一个共同担忧是，由于需要极高的带宽、动态范围和时钟速度，集成的高性能无线电可能无法实现。这种关切似乎导致了两条可供选择的发展道路。首先，UWB无线电系统被按比例缩小，以在更少的带宽下运行，从而损害了UWB系统的许多优点。另一方面，采用了具有许多分立元件的先进工艺技术，尽管代价是成本和功耗显着增加。在本提案中，PI提出了一种有前途的方法，可以使用当今低成本的标准CMOS技术实现集成的高性能UWB无线电，而不会影响信号带宽。为了满足高性能超宽带无线电的设计要求，目前还远远不能实现，他提出了一种架构，将输入信号信道化到频率子带，然后并行处理它们。通过信道化输入信号，模拟前端和数字后端的电路要求都大大放松，特别是当存在大的窄带干扰信号时。本研究将证明所提出的超宽频讯号接收与传输架构的可行性与有效性。他将基于对各种设计选项的清晰理解以及在性能和实现复杂性方面的相应权衡，提供一个完整的设计框架。此外，他将通过在硅上实现所提出的架构来证明其可行性和优势。目标是设计一个高性能的单芯片超宽带无线电。在提出的研究中开发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。他计划在该项目中基于为超宽带无线电开发的技术进行的具体应用是多模态无线电，即支持多种通信标准的无线电。上述研究计划与教育计划相结合，该计划描述了PI在各级教学中的教育动机和策略。它包括具体的计划，教学生如何学习，引入通信收发器设计的新课程，灌输高质量的口头和书面技能，培养具有广泛技术背景的研究学生，协助大学赞助的旨在帮助邻近地区的外展计划，并根据我们社会的需求进行应用研究。

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.