Collaborative Research: Spectrum Efficient Waveform Design with Application to Wireless Networks

频谱效率是指在特定的通信系统中，在给定的带宽上所能传输的信息速率。它是对有限频谱利用效率的度量。本课题针对频谱中较窄的主瓣和较低的副瓣，研究了创新的频谱高效波形设计。人们已经认识到，明智地使用适当设计的波形，加上先进的接收机策略，是充分利用电磁频谱容量的基础。该项目寻求在嵌套采样器和协同采样器上的创新方法，以提高频谱效率，并随后将其应用于无线网络。研究了基于嵌套采样器和协素数采样器的不同波形设计和多样性。协素数采样器用于多输入多输出通信系统。在频谱高效无线网络的应用中，节点通过公共无线信道交换信息。在不同的业务场景和不同的约束条件下，如带宽、信噪比和干扰比，这些节点之间交换的数据量可能会有所不同。一个关键的问题是无线网络的吞吐量如何随着新的波形设计方案和不同的网络设置而提高，以及它如何随着网络中节点的数量而增长。该项目旨在帮助实现国家宽带目标，以及缓解有限频谱资源日益增长的压力这一更大的目标。本项目将吸引少数民族和女性学生参与。

Spectrum efficiency refers to the information rate that can be transmitted over a given bandwidth in a specific communication system. It is a measure of how efficiently a limited frequency spectrum is utilized. In this project, innovative spectrum efficient waveform designs are studied towards narrower mainlobe and lower sidelobe in spectrum. It has been recognized that judicious use of properly designed waveforms, coupled with advanced receiver strategies, is fundamental to fully utilizing the capacity of the electromagnetic spectrum. This project seeks innovative approaches on nested and co-prime samplers for spectrum efficiency, and subsequently applies it to wireless networks. Different waveforms designs and diversities are studied based on nested and co-prime samplers. Co-prime samplers are used for Multi-Input Multi-Output communication system. In the application to spectrum efficient wireless networks, nodes exchange information over a common wireless channel. Under different traffic scenarios and different constraints, e.g., bandwidth and signal to noise and interference ratio, the amount of data exchanged among these nodes may vary. A key question then is how the throughput capacity of wireless network improves with the new waveform design schemes and different network setup and how it grows with the number of nodes in the network. This project seeks to help reach the nation's broadband goals and the larger objective of alleviating growing pressure on limited spectrum resources. This project will attract minority and woman students to participate in the project.