Frequency-Shifted Reference Ultra-Wideband (UWB) Communications

abstracteccs - 0725616 d。这个项目的智力价值是由对极宽带通信系统架构的渴望所激发的，这种架构有可能实现精确定位，穿透材料，与其他无线通信系统覆盖，并在给定区域内支持许多用户。因此，研究目标是解决可扩展到极端带宽的低功耗高性能收发器架构的挑战。该项目考虑了一个新的框架，该框架通过发送参考信号来解决此类架构中困难的信道估计问题，该参考信号的频率与数据信号的频率略有偏移。这允许使用一个简单的低功耗接收器进行有效的数据恢复。该项目将解决这一框架内的关键研究挑战。在具有极端带宽的系统中，存在显著的带内干扰，因此将开发用于抗干扰的多通道接收器的系统方面。还将开发通过不同频率偏移签名和相应的接收器架构来有效支持许多用户。接下来，将考虑这个简单系统的基本性能限制与任何系统可实现的最佳性能限制。最后，基于所提出的框架建立的无线测试平台将用于表征性能并允许验证理论方法。该项目的更广泛影响主要集中在：(1)具有上述极端带宽优势的简单，低功耗通信架构的社会和经济影响，以及(2)在引人注目的技术领域对研究生和本科生的教育。特别是，这种极宽带系统对各种各样的应用具有吸引力，特别是那些除了极其健壮的通信之外还需要精确定位的应用。该项目还将支持重要的研究生对理论课题的研究，并通过宽带系统的设计和建设继续开展广泛而成功的本科生研究项目。

AbstractECCS-0725616D. Goeckel, University of Massachusetts AmherstThe Intellectual Merit of this project is motivated by the desire for extremely wideband communication system architectures, which have the potential to achieve accurate positioning, material penetration, overlay with other wireless communication systems, and the support of many users in a given area. Thus, the research objective is to solve the challenges of low-power high-performance transceiver architectures that are scalable to extreme bandwidths. The project considers a novel framework that solves the difficult channel estimation problem in such architectures by sending a reference signal that is slightly shifted in frequency from the data signal. This allows for efficient data recovery with a simple low-power receiver. This project will address the key research challenges within this framework. In systems with extreme bandwidths, there is significant in-band interference, and thus the systems aspects of a multi-channel receiver for interference rejection will be developed. The efficient support of many users through varying frequency offset signatures and corresponding receiver architectures will also be developed. Next, the fundamental performance limits of this simple system versus the optimal achievable for any system will be considered. Finally, a wireless testbed built upon the proposed framework will be used to both characterize performance and allow verification of the theoretical approaches.The Broader Impacts of this project center around: (1) the social and economic impact of simple, low-power communication architectures with the advantages of extreme bandwidth as discussed above, and (2) the education of graduate and undergraduate students in a compelling technology area. In particular, such extremely wideband systems are attractive for a wide variety of applications, particularly those that require accurate positioning in addition to extremely robust communication. The project will also support significant graduate student research on the theoretical topics, and continue an extensive and successful program of diverse undergraduate research through wideband system design and construction.