High-Resolution RF to Digital Converter for Next Generation Broadband Communication Systems

用于下一代宽带通信系统的高分辨率射频数字转换器

• 批准号: 0824031
• 负责人: Jose Silva-Martinez
• 金额: $ 33万
• 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: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2011-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0824031&HistoricalAwards=false
• 关键词: Resolution; RF; Digital; Converter; Next

Objective: The objective of this research is to demonstrate the feasibility and robustness of a new mixer-less high-performance receiver architecture for multi-standard wireless radio systems based on a programmable bandpass sigma-delta modulator. The approach uses a highly linear low-noise amplifier as the input stage to a programmable high resolution analog-to-digital converter and enables low-noise conditioning, filtering and high-resolution signal digitization at radio frequencies. Intellectual Merit: The research aims at eliminating the analog down-conversion that is traditionally used in existing receiver front-ends. The new architecture employs highly selective LC filters embedded in the control loop that rejects the out-of-band interferers. This further relaxes the requirements of the analog circuits employed in the digitizer. This approach lowers the complexity and power consumption of the receiver while providing high resolution. Additionally, a unique self-healing software based calibration scheme will be developed to optimize the analog-to-digital converter for performance. Broader Impacts: The new adaptive analog-to-digital interface has the potential to enable the efficient implementation of broadband systems such as cognitive and software defined radios. The new architecture can also be readily reconfigured as a high-performance spectrum-analyzer for monitoring frequency spectrums. The project will involve graduate and undergraduate students and will include substantial participation by under-represented groups. The research results will be incorporated into courses and disseminated through technical journals and conferences as well as web postings.

目的：这项研究的目的是证明基于可编程带Sigma-Delta调制器的多标准无线无线电系统的新的无混合高性能接收器体系结构的可行性和鲁棒性。该方法使用高度线性的低噪声放大器作为输入阶段，用于可编程的高分辨率类似于数字转换器，并在无线电频率下实现低噪声调节，过滤和高分辨率信号数字化。知识分子的优点：该研究旨在消除传统上在现有接收器前端中使用的模拟下调。新的体系结构采用嵌入在控制循环中的高度选择性LC过滤器，拒绝带外干扰器。这进一步放松了数字化器中使用的模拟电路的要求。这种方法在提供高分辨率的同时降低了接收器的复杂性和功耗。此外，将开发出独特的基于自我修复软件的校准方案，以优化类似于数字的转换器的性能。更广泛的影响：新的自适应类似物到数字界面有可能有效实施宽带系统，例如认知和软件定义的无线电。新的体系结构也可以作为用于监视频谱的高性能光谱分析仪很容易重新配置。该项目将涉及研究生和本科生，并包括代表性不足的小组的大量参与。研究结果将纳入课程中，并通过技术期刊和会议以及网络发布。