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Communication over Wireless Fading Channels: A Modern View

无线衰落信道通信：现代观点

基本信息

批准号：
0118784
负责人：
David Tse
金额：
$ 35.39万
依托单位：
University of California-Berkeley
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2001
资助国家：
美国
起止时间：
2001-09-01 至 2007-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0118784&HistoricalAwards=false
关键词：
Communication over Wireless Fading Channels

项目摘要

The design of efficient wireless communication systems relies on adeep understanding of the basic characteristics of the underlyingchannel. The most fundamental and unique characteristic of wirelesschannels is the random time-variation of the channel strengths, aphenomenon known as fading. Communication over fading channels hasbeen a topic of study since the 60's. A very different view of theproblem, however, emerges from recent research. The traditional viewof fading is that it is a source of unreliability that has to becompensated for by various diversity techniques. The modern view ismuch morepowerful and considers fading as a source of randomization from naturethat can be exploited to get very significant capacity boost.The research project addresses several key problems within thismodern paradigm. They will be centered around two areas: 1)opportunistic communication : the dynamic rate and power allocationover the dimensions of time, frequency, antennas and usersso that transmission is done when and where the channel is strong;2) multi-antenna communication: the use of multiple transmit andreceive antennas to increase the number of degrees of freedom availablefor communication in richly scattered fading environments. The issuesstudied are focused on how the random fading can be exploited even inthe face ofchannel uncertainty, and the interplay between the modern andtraditional views of channel fading.

设计高效的无线通信系统依赖于对底层信道基本特性的深入了解。无线信道最基本和最独特的特征是信道强度的随机时变，即所谓的衰落。自60年代以来，衰落信道上的通信一直是S研究的主题。然而，最近的研究出现了对这个问题的截然不同的观点。对衰落的传统看法是，它是不可靠的来源，必须通过各种分集技术来补偿。现代的观点要强大得多，认为衰落是自然界随机化的一个来源，可以被利用来获得非常显著的容量提升。研究项目解决了这一现代范式中的几个关键问题。它们将集中在两个领域：1)机会主义通信：在时间、频率、天线和用户维度上的动态速率和功率分配，以便在信道强大的时候和在哪里进行传输；2)多天线通信：使用多个发射和接收天线，以增加在高度分散的衰落环境中的通信可用自由度数。所研究的问题集中在如何在面对信道不确定性的情况下利用随机衰落，以及现代和传统的信道衰落观点之间的相互作用。