Receiver Design for Close-In Phase Noise and Reciprocal Mixing Compensation

近端相位噪声和倒数混频补偿的接收器设计

• 批准号: 2054200
• 负责人: Won Namgoong
• 金额: $ 36.5万
• 依托单位: SUNY at Albany
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2054200&HistoricalAwards=false
• 关键词: Receiver; Design; Close; Phase; Noise; Receiver; Design; Close; Phase; Noise

In many wireless communication systems, the receiver needs to be highly integrated, reconfigurable, and able to coexist in congested frequency bands in the presence of many strong interfering blockers. Although significant progress has been made in advanced receiver design, mitigating the effects of oscillator phase noise remains a major challenge. Phase noise degrades the desired signal in two ways – the close-in phase noise and reciprocal mixing distortion. In the case of close-in phase noise distortion, the phase noise spectrum distorts the desired signal itself, while in the case of reciprocal mixing, the phase noise spectrum couples with nearby interfering blockers to corrupt the desired signal. While the topic of close-in phase noise distortion has been addressed in the literature, practical solutions to mitigating the effects of reciprocal mixing are nearly non-existent. The general approach to minimizing the distortion from reciprocal mixing today is to suppress the blocking interferers themselves with sharp off-chip filters at the expense of increased complexity, form factor and cost as well as reduced reconfigurability. This project will jointly and seamlessly compensate for both the close-in phase noise and reciprocal mixing distortion without requiring training signals or knowledge of the interfering blockers. The immediate impact of the proposed research is the introduction of a new approach to compensate for the effects of reciprocal mixing, which is a major problem in communication receiver design. Furthermore, as the concepts and techniques developed in the proposed research are general and broadly applicable to address other sources of circuit non-idealities, the proposed research is expected to have a major impact on how future receivers are designed. The PI’s research activities are coupled with an educational plan that delineates how the research will help train both graduate and undergraduate students. The multi-disciplinary nature of the proposed research is expected to broaden the technical understanding of the students involved. The project includes participation of undergraduate students and the recruitment of students from underrepresented groups by leveraging programs at the PI’s institution.The proposed approach employs an IF-receiver architecture with a modified local oscillator to provide the receiver front-end with the additional degrees of freedom necessary for the desired signal to span a different vector space than the subspace spanned by reciprocal mixing and close-in phase noise distortion. The phase noise induced distortion can then be removed by projecting to its null space which involves multiplying and summing of baseband samples to recover the desired signal. Despite the simplicity of the proposed phase noise compensation approach, preliminary results suggest that the resulting performance improvements are significant. There are significant research issues at both the circuit and algorithmic levels that will be addressed to fully realize the benefits of the proposed compensation approach.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在许多无线通信系统中，接收器需要高度集成，可重新配置，并且能够在许多强大的干扰阻滞剂的情况下在拥挤的频带中共存。尽管在高级接收器设计中已经取得了重大进展，但是减轻振荡器相噪声的影响仍然是一个重大挑战。相位噪声以两种方式降解所需的信号 - 近相噪声和相互混合失真。在关闭相位噪声失真的情况下，相位噪声频谱会扭曲所需的信号本身，而在相互混合的情况下，相位噪声频谱伴侣伴侣伴随着几乎干扰阻滞剂以破坏所需的信号。虽然文献中已经解决了近相噪声失真的主题，但减轻倒数混合效果的实用解决方案几乎不存在。最大程度地减少倒数混合失真的一般方法是抑制阻塞干扰物，以尖锐的外芯片过滤器本身，以增加复杂性，外形和成本以及降低的重新配置性的牺牲。该项目将共同和无缝地补偿近距离噪声和相互混合失真，而无需训练信号或干扰阻滞剂的知识。拟议研究的直接影响是引入了一种新方法来补偿相互混合的影响，这是通信接收器设计中的主要问题。此外，由于拟议的研究中开发的概念和技术是一般的，并且广泛地适用于解决其他非理想之源的来源，因此拟议的研究有望对未来接收者的设计产生重大影响。 PI的研究活动与一项教育计划相结合，该计划描述了研究将如何帮助培训研究生和本科生。拟议研究的多学科性质预计将扩大有关学生的技术理解。 The project includes participation of undergraduate students and the recruitment of students from underrepresented groups by leveraging programs at the PI’s institution.The proposed approach employs an IF-receiver architecture with a modified local oscillator to provide the receiver front-end with the additional degrees of freedom necessary for the desired signal to span a different vector space than the subspace spanned by reciprocal mixing and close-in phase noise distortion.然后，可以通过投影到其空空间来消除相噪声引起的失真，该空间涉及乘以和求基带样品以恢复所需的信号。尽管提出的相位噪声补偿方法很简单，但初步结果表明，由此产生的性能改善是显着的。在巡回赛和算法水平上都存在重大的研究问题，以充分实现拟议的薪酬方法的好处。该奖项反映了NSF的法定任务，并通过使用基金会的智力优点和更广泛的影响审查标准来通过评估来获得珍贵的支持。