CCF: Small: Online Learning and Exploitation of the Radio Frequency Spectrum with Sub-Nyquist Sampling

CCF：小型：采用亚奈奎斯特采样的射频频谱在线学习和利用

• 批准号: 1534957
• 负责人: Anna Scaglione
• 金额: $ 40.5万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-12-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1534957&HistoricalAwards=false
• 关键词: CCF; Small; Online; Learning; Exploitation

This project will close technical gaps to enable cognitive radio receivers to explore the radio frequency spectrum online, using the most advanced form of Analog to Digital conversion, referred to as Finite Rate of Innovation (FRI) sampling coupled with the most advanced learning techniques. We plan to use the well-established framework of the multi-armed bandit (MAB) problem, which models the situation of a cognitive radio agent that simultaneously attempts to acquire new knowledge and to optimize its decisions based on what it has previously learned. Our main contribution lies in combining this framework with this novel Analog to Digital receiver front-end, sampling rate below the so called Nyquist limit, adaptively tuning parameters in the sampling structure to sense spectrum opportunities over a much wider range of frequencies than was previously considered possible, and specifically further below what is attainable myopically, without adaptation. The outcome of our study is a cohesive system model for a cognitive sensors, endowed with a decision engine that can optimize not only what to sample but also how to sample analog signals, leveraging on its expected success in finding spectrum holes. The project will explore the complexity of the overall architecture and, ultimately, evaluate the potential benefits of a cognitive MAB-FRI receiver. By moving learning algorithms a step closer to manage directly the data-acquisition interface to the physical world, the research as broad implications in a variety of related sensing problems. The project will also include activities to engage students in classrooms presenting the basic mathematical tools used in this research and minorities in research projects that contribute to advance the broad field of adaptive systems.

该项目将缩小技术差距，使认知无线电接收器能够在线探索无线电频谱，使用最先进的模数转换形式，称为有限创新率（FRI）采样，再加上最先进的学习技术。我们计划使用完善的框架的多臂强盗（MAB）的问题，模型的情况下，认知无线电代理，同时试图获得新的知识，并优化其决策的基础上，它以前学到的。我们的主要贡献在于将该框架与这种新颖的模数接收器前端相结合，采样率低于所谓的奈奎斯特极限，自适应地调谐采样结构中的参数，以在比以前认为可能的更宽的频率范围内感测频谱机会，并且特别地进一步低于近视可达到的频率，而无需适应。 我们的研究成果是一个认知传感器的内聚系统模型，该模型具有决策引擎，不仅可以优化采样内容，还可以优化如何对模拟信号进行采样，从而利用其在寻找频谱漏洞方面的预期成功。该项目将探索整体架构的复杂性，并最终评估认知MAB-FRI接收器的潜在优势。通过移动学习算法更接近直接管理物理世界的数据采集接口，该研究在各种相关的传感问题中具有广泛的意义。该项目还将包括开展活动，让学生在课堂上介绍本研究中使用的基本数学工具，并让少数群体参与有助于推进适应系统这一广泛领域的研究项目。