ITR Collaborative Research: Achieving the Rate-Diversity Tradeoff in Space-Time Codes

ITR 协作研究：实现时空码速率与多样性的权衡

• 批准号: 0325180
• 负责人: Xiang-Gen Xia
• 金额: $ 42万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0325180&HistoricalAwards=false
• 关键词: ITR; Collaborative; Research; Achieving; Rate

ABSTRACT0325180Xiang-gen XiaUniversity of DelawareThe term fading is used to describe the unpredictable and often rapid fluctuation in received signal strength encountered in a wireless communication environment. Dropped calls in cellular communication are often attributable to fading. A very effective and recent technique used to combat fading is to use multiple antennas at both input (transmitter end) and output (receiver end). The term space-time communication channel is used to describe the fading, wireless communication channel in the presence of multiple input and output antennas. Multiple input and output can be used to either increase the reliability of a wireless communication channel or else increase the rate at which information can be transmitted by a factor potentially equal to the number of transmit antennas. When used to both increase reliability and rate of information transfer, there is a tradeoff between the increase in information rate and the corresponding reliability of the communication link. This tradeoff is referred to as the rate-diversity tradeoff. A principal goal in the present project is the design of signal sets that will allow the user to pick an operating point along the rate diversity tradeoff curve. Other goals include helping define and achieve the limits of the space-time communication channel.More specific objectives include the design of signal sets that achieve the rate-diversity tradeoff and that are easy to decode, the study of alternative relevant notions of channel capacity such as delay-limited channel capacity, the study of other relevant channel models including those incorporating channel memory and correlated path gains, the study of the space-time channel in the presence of feedback as well as in the presence of sources having a multi-resolution capability.

衰落这个术语用来描述在无线通信环境中接收信号强度的不可预测的和经常快速的波动。蜂窝通信中的掉话通常归因于衰落。用于对抗衰落的一种非常有效且最新的技术是在输入（发射机端）和输出（接收机端）处使用多个天线。术语空时通信信道用于描述存在多个输入和输出天线的衰落无线通信信道。多个输入和输出可以用于增加无线通信信道的可靠性，或者以潜在地等于发射天线的数量的因子来增加信息可以被发射的速率。当用于增加信息传输的可靠性和速率时，在信息速率的增加和通信链路的相应可靠性之间存在折衷。这种折衷被称为速率-分集折衷。在本项目的主要目标是设计的信号集，将允许用户选择一个操作点沿着率分集权衡曲线。其他目标包括帮助定义和实现空时通信信道的限制。更具体的目标包括设计实现速率分集折衷和易于解码的信号集，研究信道容量的替代相关概念，例如延迟受限信道容量，研究其他相关信道模型，包括那些包含信道记忆和相关路径增益的信道模型，在存在反馈的情况下以及在存在具有多分辨率能力的源的情况下的空时信道的研究。