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

基本信息

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

项目摘要

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，并且能够在存在许多强干扰阻塞的情况下在拥挤的频段中共存，尽管先进的接收器设计在减轻振荡器相位的影响方面已经取得了重大进展。噪声仍然是一个主要挑战。相位噪声以两种方式降低所需信号的质量：近距离相位噪声和倒数混频失真。在近距离相位噪声失真的情况下，相位噪声频谱会扭曲所需信号。本身，而在互易混频的情况下，相位噪声频谱与附近的干扰阻塞器耦合以破坏所需信号。虽然文献中已经讨论了近端相位噪声失真的主题，但减轻互易影响的实用解决方案。如今，最小化互混造成的失真的一般方法是使用尖锐的片外滤波器来抑制阻塞干扰本身，但代价是增加了复杂性、外形尺寸和成本，并降低了可重构性。该项目将联合、无缝地补偿近端相位噪声和互易混合失真，而不需要训练信号或干扰阻塞器的知识。拟议研究的直接影响是引入了一种新方法来补偿近端相位噪声和互易混合失真的影响。此外，由于所提出的研究中开发的概念和技术是通用且广泛适用于解决电路非理想性的其他来源，因此预计所提出的研究将产生重大影响。关于未来的接收者如何PI 的研究活动与教育计划相结合，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所涉及学生的技术理解。本科生的数量以及通过利用 PI 机构的项目从代表性不足的群体中招募学生。所提出的方法采用了带有修改后的本地振荡器的 IF 接收器架构，为接收器前端提供了额外的然后，可以通过投影到其零空间来消除相位噪声引起的失真，这涉及基带样本的乘法和求和。尽管所提出的相位噪声补偿方法很简单，但初步结果表明，由此产生的性能改进是显着的，需要解决电路和算法层面的重大研究问题，以充分实现其优点。拟定的补偿办法。本次裁决通过使用基金会的智力价值和更广泛的影响审查标准进行评估，NSF 的法定使命被认为值得支持。