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.

高效无线通信系统的设计依赖于对底层信道基本特征的深入理解。无线信道最基本、最独特的特征是信道强度随时间的随机变化，这种现象称为衰落。自 20 世纪 60 年代以来，衰落信道上的通信一直是研究课题。然而，最近的研究出现了对这个问题的截然不同的看法。传统的衰落观点认为，它是不可靠性的根源，必须通过各种分集技术来补偿。现代观点更加强大，并将衰落视为自然随机化的来源，可以利用它来获得非常显着的容量提升。该研究项目解决了这一现代范式中的几个关键问题。它们将围绕两个领域：1）机会通信：在时间、频率、天线和用户维度上的动态速率和功率分配，以便在信道较强的时间和地点进行传输；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可用于通信的自由度。研究的问题集中在即使面对信道不确定性如何利用随机衰落，以及现代和传统信道衰落观点之间的相互作用。