CIF: Small: Fundamental Performance Limits And Design Techniques For Sub-Sampled Communication Systems

CIF：小型：子采样通信系统的基本性能限制和设计技术

• 批准号: 1320628
• 负责人: Andrea Goldsmith
• 金额: $ 50万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1320628&HistoricalAwards=false
• 关键词: CIF; Small; Fundamental; Performance; Limits

Current radio receiver designs are pushing the boundaries of Analog-to-Digital conversion and digital signal processing technology in terms of speed and energy efficiency. These technology limitations present a major bottleneck in transferring promising wideband and energy-efficient receiver design paradigms from theory to practice. This project investigates whether these bottlenecks can be circumvented by designing digital communication system receivers that are sampled at sub-Nyquist rates. By sampling below the Nyquist rate, current technology can be used for very wideband communication systems and energy consumption can be significantly reduced below that required for Nyquist-rate sampling. The proposed research brings together the areas of Shannon theory and sampling theory by exploring the fundamental capacity limits of single-user and multi-user subsampled channels as well as the optimal sampling mechanisms that achieve these limits. In addition, the project will extend the ideas of sub-sampled communication to determine the rate-distortion trade-off of sub-sampled sources along with joint source-channel coding when both the source and channel are undersampled. The proposed activity will develop a broader understanding of communication system design subject to hardware constraints by exploring an important and unanswered question at the intersection of two important fields within electrical engineering: signal processing and information theory. The results of the proposed work can enable low-complexity high-performance radio designs for 60 GHz wideband communications and for cognitive radios. Furthermore, these results impact other engineering systems such as radar, optical systems, medical imaging and more, since the mathematical machinery and hardware insights developed in the proposed research can provide important insights into related areas in which reduced rate sampling and processing is needed.The broader impacts resulting from the proposed activity will include significant enhancement of the communications capabilities beyond the current state of the art in wideband, cognitive, and energy-efficient radio design. Wideband radios are of key importance to meet the significant demand for multimedia wireless communications, especially video. Cognitive radios have the ability to more efficiently utilize the limited available radio spectrum. In addition, there is a great need to design communication systems that consume minimal energy, especially sensor networks, which have application to enable smart buildings, enhance homeland security, and improve the reliability and robustness of our power grid.

当前的无线电接收器设计在速度和能源效率方面推动了模数转换和数字信号处理技术的界限。这些技术局限性在转移有希望的宽带和节能接收器的设计范式从理论到实践的范围内提出了一个主要的瓶颈。该项目调查了这些瓶颈是否可以通过设计以次级速率进行采样的数字通信系统接收器来规避这些瓶颈。通过对Nyquist速率进行采样，当前技术可用于非常宽带通信系统，并且能源消耗可以大大降低到Nyquist-Rate采样所需的范围。拟议的研究通过探索单用户和多用户子采样通道的基本容量限制以及达到这些限制的最佳抽样机制，汇集了香农理论和抽样理论领域。此外，该项目将扩展子采样的沟通的想法，以确定亚采样源的利率差异权衡以及当源和渠道都不足采样时，以及联合源通道编码。拟议的活动将通过在电气工程中两个重要领域的交集：信号处理和信息理论的相交中探索一个重要且未解决的问题，从而，将对通信系统设计进行更广泛的了解。拟议的工作的结果可以为60 GHz宽带通信和认知收音机提供低复杂性高性能无线电设计。此外，这些结果会影响其他工程系统，例如雷达，光学系统，医学成像等，因为拟议的研究中开发的数学机械和硬件见解可以为需要降低的速率采样和处理提供重要的见解。拟议活动造成的更广泛的影响将包括以宽带，认知和节能无线电设计的当前最新水平的显着增强通信能力。宽带收音机对于满足对多媒体无线通信（尤其是视频）的重大需求至关重要。认知收音机具有更有效地利用有限的可用无线电频谱的能力。此外，还需要设计能够消耗最小能源的通信系统，尤其是传感器网络，这些传感器网络可以应用智能建筑物，增强国土安全性并提高我们电网的可靠性和鲁棒性。