文档介绍：MIMO 系统对信道容量的研究 MIMO 系统信道容量研究孙丹, 张晓光( 北京邮电大学理学院北京 100876) 摘要: 针对单用户 MIMO 系统信道的容量特性展开研究。首先详细推导了无衰落信道下信道容量表达式, 然后重点分析了瑞利衰落信道下, 接收端已知信道状态信息, 发射端已知信道状态分布时的容量特性。最后分别针对瑞利衰落信道下, 采用发射分集、接收分集以及 BLAST 传输结构的系统容量进行仿真。仿真结果表明: 给定发射功率, 独立的瑞利衰落信道条件下,MIMO 系统容量随最小天线数目的增加而线性增加, 极大地提高了系统容量。关键词:MIMO; 信道容量; 瑞利衰落; 移动通信系统中图分类号: 文献标识码:A 文章编号:1004 373X(2006)19 004 03 Study of MIMO Channel Capacity SUN Dan,ZHANG Xiaoguang (School of Science,Beijing University of Posts and munications,Beijing,100876,China) Abstract:The thesis studies the capacity of MIMO systems for single ,it particularly educes the expression of channel capacity without ,it analyses the system capacity when channel state information is known at the receiver and channel distribution information is known at the end,the simulation based on different kinds of transmission method is given,such as transmit diversity,receiver diversity,and results show when the number of antennas is larger the capacity of MIMO system in the uncorrelated Rayleigh fading environment is linear to the minimum of antennas,if the power at transmitter is fixed,and the more capacity is increased. Keywords:MIMO;channel capacity;Rayleigh fading;munication system 收稿日期:200604 16 基金项目: 国家自然科学基金(60577046); 北京市教育委员会共建计划项目(XK100130537) 1引言目前, 很多国家都已经开始新一代移动通信系统的研究, 新一代移动通信系统可以提供高速率(10 ~ 100 Mb/s) 的数据业务, 因此必须采用一些具有大容量、高频谱利