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非常宽的带宽的好处：隐蔽性（极低功率密度信号），非常精确的测距（低至几厘米），良好的材料渗透性（低频）和高性能密集多径UWB支持者的一个共同关注点是，集成的高性能无线电可能无法实现，因为需要极高的带宽、动态范围和时钟速度。这种关切似乎导致两种可供选择的发展道路。在第一种情况下，UWB无线电系统按比例缩小到在大大减小的带宽下操作，从而损害UWB系统的许多益处。在另一个，先进的工艺技术与众多的分立元件被采用，虽然在显着更高的成本和功耗的代价。在这个建议中，PI提出了一个很有前途的方法来实现集成的高性能UWB无线电使用当今的低成本标准CMOS技术，而不影响信号带宽。为了满足高性能UWB无线电的设计要求，这是目前还远未实现的，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。通过对输入信号进行信道化，大大降低了模拟前端和数字后端的电路要求，尤其是在存在大的窄带干扰信号时，本研究将证明所提出的UWB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，基于对各种设计选项的清晰理解以及相应的性能和实现复杂性的权衡。此外，他将通过在硅上实现该架构来展示其可行性和优势。本研究的目标是设计一个高性能的单芯片超宽带无线电系统，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，例如高速卫星和有线通信系统。他计划在该项目中基于UWB无线电技术开发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。上述研究计划与一个教育计划相结合，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生，协助大学赞助的旨在帮助邻近地区的推广计划，并追求以我们社会的需求为指导的应用研究。

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.