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

ITR 协作研究：实现时空码速率多样性权衡

• 批准号: 0326628
• 负责人: P. Vijay Kumar
• 金额: --
• 依托单位: University of Southern California
• 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=0326628&HistoricalAwards=false
• 关键词: ITR; Collaborative; Research; Achieving; Rate

ABSTRACT0326628Vijay P. KumarU of Southern CaliforniaThe 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.

摘要0326628Vijay P. Kumar 南加州大学 术语“衰落”用于描述无线通信环境中所遇到的接收信号强度的不可预测且通常快速的波动。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（接收端）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情况下的衰落无线通信信道。多个输入和输出可用于提高无线通信信道的可靠性，或者以可能等于发射天线数量的因子提高信息传输速率。当用于提高信息传输的可靠性和速率时，在信息速率的提高和通信链路的相应可靠性之间存在权衡。这种权衡称为速率-多样性权衡。本项目的主要目标是设计信号集，允许用户沿着速率分集权衡曲线选择操作点。其他目标包括帮助定义和实现时空通信信道的限制。更具体的目标包括设计实现速率分集权衡且易于解码的信号集，研究信道容量的替代相关概念，例如作为延迟有限的信道容量，其他相关信道模型的研究，包括那些结合了信道记忆和相关路径增益的信道模型，在存在反馈以及存在具有多分辨率的源的情况下对时空信道的研究能力。