Space-Time Transmitter and Receiver Design with Delay Constraints

具有延迟约束的时空发射机和接收机设计

• 批准号: 0431092
• 负责人: Zhengdao Wang
• 金额: --
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0431092&HistoricalAwards=false
• 关键词: Space; Time; Transmitter; Receiver; Design

Abstract:Communication with multiple antennas is a promising technology forfuture high-rate wireless communication systems. It is often referredto as space-time communication because the transmitted signal isencoded both across the antennas (space) and time. Over the past tenyears, various space-time coding and decoding schemes have beendeveloped. They can be roughly divided into two categories:short-frame code designs and long-frame code designs. Relatively lessattention has been given to the transceiver design issues inspace-time communications with medium-length frames, i.e., thosecontaining more than a few but less than, say, a thousand bits. We usemedium-length frames in practice for several reasons: i) The data maybe bursty and of medium-length, which is often the case in Internettraffic; ii) There may be stringent delay constraints which forbidlong frame transmissions, such as in real-time computing and controlapplications. Such medium-length transmissions are not in thespace-time block-code (or short-code) paradigm and yet not long enoughto allow powerful error-control codes such as turbo or low-densityparity-check codes to demonstrate their full ``power''.This project investigates several key issues in medium-lengthspace-time communications. Firstly, it pursues the problem oftransmitter code design for delay-constrained space-timecommunications. Secondly, it investigates the problem of high decodingcomplexity in space-time systems with a large number of transmitantennas and/or a large modulation constellation, and developslow-complex detectors for such scenarios. Thirdly, it deals with theproblem of space-time channel estimation at the receiver with orwithout training symbols. The research in these topics will alsobenefit long-frame space-time communication systems, as well asimportant applications in multi-user detection and in future sensornetworks.

翻译后摘要：多天线通信是一种很有前途的技术forfuture高速率无线通信系统。它通常被称为空时通信，因为传输的信号在天线（空间）和时间上都被编码。在过去的十年中，各种空时编码和解码方案被开发出来。它们大致可以分为两类：短帧码设计和长帧码设计。相对较少的注意力已经被给予收发器设计问题，即具有中等长度帧的同步时间通信，thosecontaining含有more than a few少数but less少than，say，a thousand一千bits位.我们在实践中使用中等长度的帧有几个原因：i）数据可能是突发的和中等长度的，这在Internet流量中经常是这种情况; ii）可能存在严格的延迟约束，禁止长帧传输，例如在实时计算和控制应用中。这种中等长度的传输不是空时分组码（或短码）的范例，而且还不足以让强大的差错控制码（如turbo码或低密度奇偶校验码）展示它们的全部“力量”。首先，研究了时延受限的空时通信系统的发射码设计问题。其次，研究了具有大量发射天线和/或大调制星座的空时系统中的高解码复杂度问题，并针对这种情况开发了慢复杂度检测器。第三，研究了接收端有无训练符号的空时信道估计问题。这些课题的研究对长帧空时通信系统、多用户检测以及未来传感器网络等都有重要的应用价值。