色噪声下MIMO信道估计优化及容量下限分析  

Channel Estimation Optimization and Lower Bound of Capacity Analysis in MIMO System with Colored Noise

作　　者：景小荣[1] 周正中[1] 贺涛[2] 

机构地区：[1]电子科技大学通信与信息工程学院,成都610054 [2]电子科技大学电子工程学院,成都610054

出　　处：《电子科技大学学报》2007年第2期179-181,202,共4页Journal of University of Electronic Science and Technology of China

摘　　要：针对色噪声背景下MIMO块平坦衰落信道进行了估计和优化,并以信道估计的优化结果为基础,分析了估计信道的互信息量下限和系统的容量下限,提出了利用注水算法来优化发射端天线阵列的功率分配,以提高系统容量下限。仿真结果表明利用信道估计的优化结果,同时通过发送功率优化分配,可使MIMO系统容量下限有明显提高。The Multi-Input and Multi-Output （MIMO） block flat-fading channel is estimated and optimized with colored noise. The lower bounds of mutual information and system capactiy are analyzed based on the optimization result of estimated channel. The approach to improve the lower bound of system capacity by the optimized power allocation of transmit antennas array through waterpouring algorithm is presented. The simulation result shows that some capacity gain is obtained by transmitter power allocation according to the optimal result of estimated channel.

关 键 词：容量下限 MIMO信道估计 功率分配 注水算法 

分 类 号：TN911.5[电子电信—通信与信息系统]