Simplified transmitter design for MIMO systems with channel uncertainty

作     者：DU Juan KANG Gui-xia ZHANG Ping 

作者机构：Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China School of Information Science and Engineering Lanzhou University Lanzhou 730000 China 

出 版 物：《The Journal of China Universities of Posts and Telecommunications》 (中国邮电高校学报（英文版）)

年 卷 期：2009年第16卷第2期

页      面：20-23,34页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 0835[工学-软件工程] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：supported by the National Natural Science Foundationof China(60502038) the Hi-Tech Research and Development Program of China(2006AA01Z272,2006AA01Z283) Beijing New Star Program of Science and Technology,China(2007A046) 111 Project of Ministry of Education(MOE)of China(B07005) 

主　　题：MIMO capacity channel state information (CSI) channel estimation error covariance feedback mutual information power allocation 

摘      要：This article investigates transmitter design in Rayleigh fading multiple input multiple output （MIMO） channels with spatial correlation when there are channel uncertainties caused by a combined effect of channel estimation error and limited feedback. To overcome the high computational complexity of the optimal transmit power allocation, a simple and suboptimal allocation is proposed by exploiting the transmission constraint and differentiating a bound based on Jensen inequality on the channel capacity. The simulation results show that the mutual information corresponding to the proposed power allocation closely approaches the channel capacity corresponding to the optimal one and meanwhile the computational complexity is greatly reduced.