Blocker-Tolerant Wideband Cognitive Spectrum Sensor

耐受阻塞的宽带认知频谱传感器

• 批准号: 1547436
• 负责人: Sebastian Hoyos
• 金额: $ 75万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1547436&HistoricalAwards=false
• 关键词: Blocker; Tolerant; Wideband; Cognitive; Spectrum

This EARS (Enhancing Access to the Radio Spectrum) program was founded in response to the 2010 Presidential Memorandum on Unleashing the Wireless Broadband Revolution mandated by Congress as part of the National Broadband Plan. It was referenced in 2010 State of the Union and later on the Middle Class Tax Relief and Job Creation Act of 2012 (More than 1/3 of the bill deals with radio spectrum), the PCAST 2012 Report [President's Council of Advisors on Science and Technology] (which calls for vastly increased use of spectrum sharing) and the 2013 Presidential memo (Expanding America's Leadership in Wireless Innovation). The aim of this program is to identify bold new concepts with the potential to contribute to significant improvements in the efficiency of radio spectrum utilization, protection of passive sensing services, and in the ability for traditionally underserved Americans to benefit from current and future wireless-enabled goods and services. The impact is large on the economics of the Nation as seen on the last FCC bidding of 65MHz of the spectrum for over $45 billion early in 2015. It will enable access to science, engineering, industry, civilian and military users of the radio frequency (RF) spectrum.The objective of this proposal is to provide an innovative, secure and resilient spectrum-sharing technology to improve wireless broadband communications for the consumer electronics sector and enhance spectrum availability for critical government services. The problem of sensing, estimating and detecting several gigahertz of a spectrum bandwidth populated by a number of unidentified (as to location) user's signals has unleashed a highly interdisciplinary research endeavor. This problem a crosscutting problem in all these disciplines: signal processing, communications, systems, and circuit problem. The fundamental challenge is to estimate unoccupied spectrum regions that are surrounded by potentially large signal blockers. The combined bandwidth, linearity and dynamic range requirements of these unoccupied regions exceed that found in state-of-art of radio receivers by several times. Cognitive radio technology has been proposed for such purposes over the last decade; however, its development has run into bottlenecks due to several technological challenges. This proposal addresses the need for a more efficient coexistence of weak opportunistic secondary user signals with mixed strong/weak primary signals that are currently used for commercial applications, public safety, homeland security, and national defense. This proposal aims at designing and optimizing novel and innovative cognitive multi-channel spectrum sensors, enabling smart and dynamic next-generation wireless communication systems, which will coexist harmonically with other broadband systems over the same frequency bands. To accomplish this goal, the proposed research objectives are: (1) coarse frequency estimation of strong primary signal blockers that interfere with the estimation and detection of weaker primary signals and spectrum holes; (2) strong blocker removal system in the radio frequency (RF) and analog domain to filter out the selected channel for reliable determination of opportunistic communications; (3) novel signal processing techniques based on locally most powerful (LMP) detectors for the estimation and detection of weak primary signals and spectrum holes.

该耳朵（增强无线电频谱的访问）计划是根据2010年总统备忘录释放国会作为国家宽带计划的一部分的无线宽带革命的响应而建立的。它在2010年国际电联的2012年中产阶级税收减免和创造就业法案（超过1/3涉及无线电频谱），PCast 2012 2012报告[总统科学技术顾问委员会]（呼吁大大增加频谱共享的使用）和2013年美国总统纪念馆（扩大无线领导力的领导力）。该计划的目的是确定大胆的新概念，有可能为无线电频谱利用率的效率，被动传感服务的保护以及传统上服务不足的美国人从当前和未来的无线支持商品和服务中受益的能力做出重大改善。这种影响对国家经济的影响很大，如2015年初65MHz频谱的最后一次FCC竞标中所见。它将在2015年初以超过450亿美元的价格出价。它将能够获得科学，工程，工程，工业，工业，平民和军事用户（RF）频谱的目标。该提议的目标是为了提供创新的，安全和稳固的技术，可以提供一项创新的，可及时的技术，以改善无效的技术和弹性的技术，并具有弹性的技术和弹性，并具有弹性的技术，并具有弹性的技术和固定的范围。提高关键政府服务的频谱可用性。传感，估算和检测几个由许多未知（位置）用户的信号所填充的光谱带宽的问题的问题已经释放了一项高度跨学科的研究工作。这个问题在所有这些学科中是一个横切问题：信号处理，通信，系统和电路问题。基本的挑战是估计被潜在的大型信号阻滞剂包围的未占用的光谱区域。这些空置区域的组合带宽，线性和动态范围要求超过了在无线电接收器的前部几次。在过去的十年中，已经提出了认知无线电技术。但是，由于一些技术挑战，其发展已成为瓶颈。该提案旨在解决薄弱的机会性二级用户信号具有更有效的具有混合/弱的主要信号，这些信号目前用于商业应用，公共安全，国土安全和国防。该建议旨在设计和优化新颖和创新的认知多通道频谱传感器，从而实现智能和动态的下一代无线通信系统，这将在相同频带上与其他宽带系统谐音。为了实现这一目标，提出的研究目标是：（1）强大的主要信号阻滞剂的粗频估计，这些信号阻滞剂干扰了较弱的主信号和频谱孔的估计和检测； （2）射频（RF）和模拟域中的强阻机去除系统，以过滤选定的通道以可靠地确定机会性通信； （3）基于局部最强大（LMP）检测器的新型信号处理技术，用于估计和检测弱主信号和光谱孔。