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

自从引入蜂窝电话以来，对移动的数据业务的需求一直在持续增长。无线电频谱的有效利用和智能无线网络管理是满足这种流量需求和刺激经济增长的关键。已经表明，当在用户之间共享而不是授权给特定用户和通信系统时，可以更有效地使用频谱。然而，频谱共享技术和法规仍处于起步阶段。特别是，无线电接收器性能对频谱监管和管理的影响还没有得到很好的理解，需要从理论和实验两方面进行仔细分析。该项目将获得基本概念和管理策略，以教育学生，研究人员，监管机构，标准化机构和行业的重要性，表征接收机的动态频谱接入系统的成功实现。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，并成为从市场上淘汰不良接收器的重要一步。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，这将产生深远的经济和社会效益。射频（RF）接收机前端是非线性系统，会产生互调失真，因此会以非直观的方式产生有害的跨信道干扰，从而损害接收机性能。随着异构无线系统之间的频谱共享的出现，以及对于诸如毫米波技术之类的表现出差的选择性的通信系统，更好地考虑相邻信道干扰对网络性能的影响的需要变得不可或缺。该项目通过提供基本分析来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，该分析量化了RF前端非线性对网络性能、利用率和公平性的影响。该项目的科学价值在于：（1）导出表征和量化RF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RF缺陷、传输掩码和异构无线设备的多样性;（3）建立用于网络级非线性干扰避免和消除的相邻信道的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测试床。该测试平台将使项目期后的进一步研究和教育成为可能，并与分析框架一起，启动针对高性能下一代无线网络的RF前端非线性感知网络设计和管理的急需研究。

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.