A High-Performance Wideband Receiver for Cognitive Radio

用于认知无线电的高性能宽带接收器

• 批准号: 1310279
• 负责人: Won Namgoong
• 金额: $ 33万
• 依托单位: University of Texas at Dallas
• 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: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1310279&HistoricalAwards=false
• 关键词: Performance; Wideband; Receiver; Cognitive; Radio

Intellectual Merit:Cognitive radio enables efficient use of the scarce radio spectrum by sensing available bands and communicating in an opportunistic manner. Although significant work has been reported in the literature that enables dynamic use of these under-utilized spectrum resources, the underlying assumption in cognitive radio is the availability of a flexible and efficient wideband receiver. Designing such a receiver, however, is challenging. The specific problems are the inter-modulation and harmonic distortion caused by the wide passband of the receiver, the need for a wide tuning range frequency synthesizer to span the frequency band of interest, and the use of power-hungry high-speed ADCs to reduce sensing time. In the proposed research, the harmonic mixing process in wideband receivers is viewed as a multi-user access system in communications. This perspective allows leveraging on existing work on multi-user detection theory to develop techniques to overcome many of the implementation challenges. To fully realize the benefits of the proposed approach, several research tasks will be pursued, including developing a scalable receiver architecture, exploring analog combining methods of multi-phase/multi-frequency clocks to maximize performance after digital equalization, and devising a robust and high-performance digital equalizer that exploits the structure of the mixing process. Furthermore, this research will demonstrate the feasibility and the advantages of the proposed approach to wideband receiver design by realizing it on silicon. A complete design framework will be developed based on a clear understanding of various design options and the corresponding tradeoffs in performance and implementation complexity.Broader Impact:The proposed research should help realize a high-performance cognitive radio, which has emerged as a promising approach to efficiently exploit the scarce radio electromagnetic spectrum. In addition, the concepts developed in this research are broadly applicable to many existing and emerging wideband systems such as in multi-standard/multi-band radios and software defined radios. The principles can also be applied to non-communication applications in radar systems and sensor networks. The above research plan is coupled with an education plan that describes how the proposed research will help train both graduate and undergraduate students. The multi-disciplinary nature of the proposed research will broaden the students technical understanding, which the PI believes is essential for next generation of engineers. The proposal also includes plans to improve the participation of undergraduate students and members of under-represented groups.

智力优点：认知无线电通过感知可用的频带并以机会主义的方式进行沟通来有效利用稀缺的无线电谱。尽管文献中已经报道了能够动态使用这些未充分利用的频谱资源的重要工作，但认知无线电中的基本假设是灵活，有效的宽带接收器的可用性。但是，设计这样的接收器是具有挑战性的。具体问题是由接收器的宽通带引起的调制和谐波失真，需要宽的调谐范围频率合成器跨越感兴趣的频带，以及使用渴望耗电的高速ADC来减少感应时间。在拟议的研究中，宽带接收器中的谐波混合过程被视为通信中的多用户访问系统。这种观点允许利用多用户检测理论的现有工作来开发技术以克服许多实施挑战。为了充分实现拟议方法的好处，将追求几项研究任务，包括开发可扩展的接收器体系结构，探索模拟组合多相/多频率时钟的方法，以在数字均衡后最大化性能，并设计出强大且高强度的数字均衡器，从而利用混合过程的结构。此外，这项研究将通过在硅上实现宽带接收器设计的可行性和优势。将根据对各种设计选项的清晰理解以及性能和实施复杂性的相应权衡而开发完整的设计框架。Boader的影响：拟议的研究应有助于实现高性能认知无线电，该无线电是有效地利用稀有无线电电磁频谱的有前途的方法。此外，这项研究中发展的概念广泛适用于许多现有和新兴的宽带系统，例如在多波段/多波段收音机和软件定义的无线电中。这些原理也可以应用于雷达系统和传感器网络中的非通信应用程序。上述研究计划以及一项教育计划，描述了拟议的研究将如何帮助培训研究生和本科生。拟议的研究的多学科性质将扩大学生的技术理解，PI认为这对于下一代工程师至关重要。该提案还包括改善本科生和代表性不足小组成员的参与计划。