NeTS: Medium: Implications of Receiver RF Front End Nonlinearity on Network Performance: Fundamentals, Limitations, and Management Strategies

NeTS：中：接收器射频前端非线性对网络性能的影响：基本原理、局限性和管理策略

• 批准号: 1564148
• 负责人: Jeffrey Reed
• 金额: $ 83.04万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-15 至 2023-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1564148&HistoricalAwards=false
• 关键词: NeTS; Medium; Implications; Receiver; RF

Since the introduction of cell phones, the demand on mobile data traffic has been continuously growing. The efficient utilization of the radio frequency spectrum and clever wireless network management are key for satisfying this traffic demand and spurring economic growth. It has been shown that spectrum can be more efficiently used when shared among users rather than licensed to specific users and communication systems. However, spectrum sharing technology and regulations are still in their infancy. In particular, the effect of radio receiver performance on spectrum regulation and management is not well understood and needs careful analysis, both theoretical and experimental. This project will derive the fundamental concepts and management strategies to educate students, researchers, regulators, standardization bodies and industry about the importance of characterizing receivers for a successful realization of dynamic spectrum access systems. The results of this research will increase social awareness about low-quality wireless devices and their implications on capacity and serve as an important step towards the healthy obsolescence of bad receivers from the market. This project aims to redefine the way we understand, design, and optimize the next generation wireless networks, which will have far reaching economic and social benefits.Radio frequency (RF) receiver front ends are nonlinear systems that create inter-modulation distortion and, hence, can impair receiver performance by creating harmful cross-channel interference in non- intuitive ways. The need to better account for adjacent channel interference on network performance becomes indispensable with the advent of spectrum sharing between heterogeneous wireless systems, and for communication systems which exhibit poor selectivity, such as millimeter wave technology. This project addresses the technological challenges in receiver-centric wireless network design and management by providing a fundamental analysis that quantifies the implications of RF front end non-linearity on network performance, utilization, and fairness. The scientific merit of this project is to (1) derive fundamental models and metrics that characterize and quantify the implications of RF front ends on network performance; (2) develop a comprehensive wireless network management framework and strategies that account for the RF imperfections, transmit masks, and diversity of heterogeneous wireless devices; (3) establish fundamentals of nonlinear interference between symbols of adjacent channels for network-level nonlinear interference avoidance and cancellation; and (4) build a testbed for the validation of theoretical concepts. This testbed will enable further research and education beyond the project period and, together with the analytical framework, initiate the much-needed research on RF front end non-linearity-aware network design and management for high-performance next generation wireless networks.

自手机问世以来，移动数据流量的需求一直在不断增长。无线频谱的高效利用和巧妙的无线网络管理是满足这一业务需求和刺激经济增长的关键。已经证明，当频谱在用户之间共享而不是授权给特定用户和通信系统时，可以更有效地利用频谱。然而，频谱共享技术和法规仍处于初级阶段。特别是，无线电接收机性能对频谱调节和管理的影响还不是很清楚，需要仔细分析，无论是理论上的还是实验上的。该项目将引出基本概念和管理策略，以教育学生、研究人员、监管机构、标准化机构和行业了解成功实现动态频谱接入系统的接收器特性的重要性。这项研究的结果将提高社会对低质量无线设备及其对容量的影响的认识，并成为朝着健康淘汰来自市场的不良接收器迈出的重要一步。该项目旨在重新定义我们理解、设计和优化下一代无线网络的方式，这将具有深远的经济效益和社会效益。射频(RF)接收器前端是一种非线性系统，会产生互调失真，因此可能会通过非直观的方式造成有害的跨通道干扰而影响接收器的性能。随着不同种类无线系统之间的频谱共享的出现，以及对于表现出较差选择性的通信系统，例如毫米波技术，更好地考虑相邻信道干扰对网络性能的需求变得不可或缺。该项目通过提供基本分析来量化射频前端非线性对网络性能、利用率和公平性的影响，从而解决以接收器为中心的无线网络设计和管理中的技术挑战。该项目的科学价值在于：(1)推导出表征和量化射频前端对网络性能的影响的基本模型和度量；(2)开发一个全面的无线网络管理框架和策略，以解决不同类型无线设备的射频缺陷、传输掩码和分集；(3)建立用于网络级非线性干扰避免和消除的相邻信道符号之间的非线性干扰的基本原理；以及(4)建立用于验证理论概念的试验台。这一试验台将在项目期之后进行进一步的研究和教育，并与分析框架一起，启动高性能下一代无线网络的射频前端非线性感知网络设计和管理方面亟需的研究。

项目成果

AI-Driven Demodulators for Nonlinear Receivers in Shared Spectrum with High-Power Blockers

• DOI: 10.1109/wcnc51071.2022.9771613
• 发表时间: 2022-01
• 期刊: 2022 IEEE Wireless Communications and Networking Conference (WCNC)
• 作者: H. Mohammadi;Walaa AlQwider;T. Rahman;V. Marojevic

Iterative Space Time Block Equalizer for Single Carrier Systems with Receiver Nonlinearity

• DOI: 10.1109/wcnc51071.2022.9771797
• 发表时间: 2022-04
• 期刊: 2022 IEEE Wireless Communications and Networking Conference (WCNC)
• 作者: T. Rahman;V. Marojevic

Adaptive Pilot Patterns for CA-OFDM Systems in Nonstationary Wireless Channels

非平稳无线信道中 CA-OFDM 系统的自适应导频模式

• 发表时间: 2017
• 期刊: IEEE transactions on vehicular technology
• 影响因子: 6.8
• 作者: Rao, Raghunandan R.;Marojevic, Vuk;Reed, Jeffrey H.
• 通讯作者: Reed, Jeffrey H.

Iterative Equalization of STSK-Aided Single-Carrier Systems: Design and Analysis With Non-Ideal Power Amplifiers

STSK 辅助单载波系统的迭代均衡：非理想功率放大器的设计与分析

• DOI: 10.1109/tvt.2021.3126273
• 发表时间: 2022
• 期刊: IEEE Transactions on Vehicular Technology
• 影响因子: 6.8
• 作者: Rahman, Talha Faizur;Marojevic, Vuk;Sacchi, Claudio
• 通讯作者: Sacchi, Claudio

A Digital Predistortion Scheme Exploiting Degrees-of-Freedom for Massive MIMO Systems

• DOI: 10.1109/icc.2018.8422266
• 发表时间: 2018-01
• 期刊: 2018 IEEE International Conference on Communications (ICC)
• 作者: Miao Yao;Munawwar M. Sohul;R. Nealy;V. Marojevic;Jeffrey H. Reed