Reconfigurable Bandpass Sampling Receivers for Software-Defined Radio Applications

适用于软件定义无线电应用的可重新配置带通采样接收器

• 批准号: 1444086
• 负责人: Xiaoguang Liu
• 金额: $ 50万
• 依托单位: University of California-Davis
• 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: 2014-11-01 至 2018-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1444086&HistoricalAwards=false
• 关键词: Reconfigurable; Bandpass; Sampling; Receivers; Software

Proposal Title: Reconfigurable Band-Pass Sampling Receivers for Software-Defined Radio Applications. Institution: University of California-DavisThe last few decades have seen tremendous progress in the development of wireless communication technologies. Wireless technologies are tightly woven into every facet of today's society and have significantly contributed to the advancement of human civilization. Future wireless systems are expected to have even more functionality, longer battery life, smaller size and more importantly, lower cost. At the same time, a proliferation of vastly different wireless standards, devices, and systems has continued to challenge us to make better use of the already congested radio spectrum. One example is the 4G cellular networks, which have been allocated more than 40 different bands worldwide, causing significant implementation problems for cellular infrastructure providers and mobile handset manufacturers. To overcome these challenges, concepts such as software defined radios and cognitive radios have been proposed. In these systems, both software and hardware (analog and radio frequency front-end circuits) can be reconfigurable adaptively to make the most efficient use of the available spectrum. Although much research has been done in this area, making truly reconfigurable radio front-end circuit remains a challenge. In this research, we propose a band-pass sampling receiver architecture that is reconfigurable in terms of operating frequency, bandwidth, and signal waveforms. The proposed research will have a transformative impact on future wireless communication systems. The highly reconfigurable wireless receivers made available through this research will enable not only highly versatile mobile systems but also a significantly more economical and environmentally friendly telecommunication infrastructure. Such infrastructure and systems will result in more efficient utilization of and public access to the radio spectrum.In contrast to a low-pass sampling receiver, the proposed receiver samples at a much lower frequency with respect to the center frequency of the signal. The analog-to-digital converter (ADC) in the band-pass sampling radio therefore operates at a much lower bandwidth, resulting in a significant reduction in power consumption. The I/Q separation and baseband processing (channel filtering, base-band AGC, etc) can be carried out entirely in the digital domain. This will improve flexibility in terms of adapting to different waveforms and wireless standards. The use of high-Q tunable RF band-pass filters ensures that minimum distortion is introduced by out of band interferers. Compared with existing solutions, the proposed architecture pushes digitization closer to the antenna as possible without having to sacrifice the dynamic range. The proposed receiver has the potential to significantly increase the utilization of the ever more crowded radio frequency spectrum.The outcome of this research will be widely disseminated through academic and trade journals/conferences and the PIs' research group websites. The PIs plan to establish a summer outreach program on wireless technology to promote interests in STEM subjects, engineering in particular for high-school students and teachers. The outcome of the research will also be integrated into the graduate and undergraduate courses the PIs have developed. In addition, the PIs plan to engage undergraduate students in research to promote their interest in pursuing advanced degrees in engineering.

提案标题：软件定义的无线电应用程序的可重新配置的频带采样接收器。机构：加州大学戴维斯大学最近几十年在无线通信技术的发展中取得了巨大进步。无线技术紧密地编织到当今社会的各个方面，并为人类文明的发展做出了重大贡献。预计未来的无线系统将具有更多的功能，更长的电池寿命，尺寸较小，更重要的是，成本较低。同时，截然不同的无线标准，设备和系统的扩散一直在挑战我们，以更好地利用已经拥挤的无线电频谱。一个例子是4G蜂窝网络，该网络已在全球范围内分配了40多个不同的频段，从而为蜂窝基础设施提供商和移动手机制造商造成了重大实施问题。为了克服这些挑战，已经提出了诸如软件定义的无线电和认知无线电之类的概念。在这些系统中，软件和硬件（模拟和射频前端电路）都可以适应性地重新配置，以最有效地利用可用频谱。尽管在这一领域已经进行了大量研究，但真正可重新配置的无线电前端电路仍然是一个挑战。在这项研究中，我们提出了一个带通的采样接收器体系结构，该架构在工作频率，带宽和信号波形方面是可重新配置的。拟议的研究将对未来的无线通信系统产生变革性的影响。通过这项研究提供的高度可重新配置的无线接收器不仅可以实现高度通用的移动系统，而且可以实现更经济和环保的电信基础设施。这样的基础架构和系统将导致对无线电频谱的更有效利用和公众访问。与低通采样接收器相比，相对于信号的中心频率，提议的接收器采样频率要较低。因此，在频道采样无线电中的模数转换器（ADC）的运行较低得多，导致功耗显着降低。可以在数字域中完全执行I/Q分离和基带处理（通道过滤，基本频段AGC等）。这将在适应不同的波形和无线标准方面提高灵活性。使用高Q可调的RF带通滤波器可确保从频带干扰器中引入最小失真。与现有的解决方案相比，所提出的架构将数字化尽可能接近天线，而无需牺牲动态范围。拟议的接收器有可能显着增加越来越拥挤的射频频谱的利用。这项研究的结果将通过学术和贸易期刊/会议以及PIS的研究小组网站广泛传播。 PIS计划建立有关无线技术的夏季推广计划，以促进对STEM主题的兴趣，尤其是高中生和老师的工程。研究的结果还将集成到PIS开发的研究生和本科课程中。此外，PIS计划让本科生参与研究，以促进他们对获得高级工程学位的兴趣。