CIF: Small: Disparity of Coherence and Channel Information in Wireless Networks - Opportunities and Challenges

CIF：小：无线网络中一致性和信道信息的差异 - 机遇与挑战

基本信息

批准号：
1527598
负责人：
Aria Nosratinia
金额：
$ 42.16万
依托单位：
University of Texas at Dallas
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1527598&HistoricalAwards=false
关键词：
CIF Small Disparity Coherence Channel

项目摘要

Due to the increasing demand on wireless spectrum and empowered by continued improvements in circuit technology, the performance limits of wireless networks as well as methods that hold the promise of approaching these limits remain a vital topic of inquiry. Many of the advanced techniques in wireless communication are increasingly dependent on the knowledge of link qualities (channel state information) being acquired and properly exchanged among the nodes. This task is closely dependent on how rapidly the corresponding channel gains vary (coherence intervals). Link coherence intervals may easily be different due to variations in node speeds or differences in scattering environment, but a fundamental characterization of the performance limits of networks under link coherence disparity has not been available thus far. This project exploits additional degrees of freedom that coherency disparity exposes, thus increasing spectral efficiency in wireless communication networks. The research plan is tightly coupled with educational outreach activities that seek to foster inclusiveness in STEM fields.This project initiates a fundamental study of the effects of coherence disparity on wireless networks, addressing prototype building blocks of wireless networks, their performance limits under coherence disparity, and efficient methods of capturing gains in this scenario. The project has the following main components: (1) Study of broadcast channels and multiple-access channels under coherence disparity, including multi-user extensions and outer bounds; (2) Study of frequency-selective channels and orthogonal frequency-division multiplex (OFDM) resource reuse under coherence disparity; and (3) Study of relay and cooperative networks under coherence disparity.

由于对无线频谱的需求不断增长，并且通过电路技术的持续改进而授权，因此无线网络的性能限制以及保持接近这些限制的希望的方法仍然是询问的至关重要的话题。无线通信中的许多先进技术越来越依赖于获取并在节点之间正确交换的链接质量（渠道状态信息）的知识。此任务密切取决于相应的通道获得的速度（相干间隔）。由于节点速度的变化或散射环境的差异，链路相干间隔可能很容易不同，但是到目前为止，链接相干差异尚未获得网络性能限制的基本表征。该项目利用了额外的自由度，使连贯性差异暴露出来，从而提高了无线通信网络的光谱效率。该研究计划与旨在促进STEM领域的包容性的教育外展活动紧密相结合。本项目启动了一项基础研究，对连贯性差异对无线网络的影响，解决无线网络的原型构建块，其性能限制在相干性差异下的效果限制，并有效地捕获了这种情况。该项目具有以下主要组成部分：（1）研究在相干差异下的广播通道和多访问通道，包括多用户扩展和外部边界；（2）研究频率选择通道和正交频划分多路复用（OFDM）资源在相干差异下重用；（3）在相干差异下对中继和合作网络的研究。