Precoding scheme for up-link multi-user MIMO system with imperfect channel state information

被引：0
|
作者：
Chen X. [1 ,2 ]
Zhu Y. [2 ]
Su J. [2 ]
Zhu Q. [1 ,2 ]
Hu X. [2 ]
机构：
[1] Jiangsu Key Laboratory of Internet of Things and Control Technologies, Nanjing
[2] College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2016年 / 38卷 / 08期
基金：
中国博士后科学基金;
关键词：
Amplify-and-forward; Antenna correlation; Channel estimation errors; Minimum Mean-Square Error (MMSE); Up-link multi-user MIMO relay system;
D O I：
10.11999/JEIT151161
中图分类号：
学科分类号：
摘要：
This paper investigates transceiver design for dual-hop up-link multi-user Multiple-Input Multiple- Output (MIMO) system with Amplify-and-Forward (AF) relay to improve the performance of Bit Error Ratio (BER) under the imperfect Channel State Information (CSI). Since the antenna correlation at both ends of the channel and the channel estimation errors are taken into account, a robust transceiver design is proposed. The optimization issue is formed with Minimum Mean-Square Error (MMSE) rule firstly. Then the relaying matrix and the optimal source precoding matrix are optimized at the maximum power constraint of the transmitter and relay station subsequently. Finally, the equalizer is optimized by a gradient-based line search algorithm. Simulation results indicate that the proposed design approach achieves better robustness against antenna correlation and channel estimation errors than existing methods. © 2016, Science Press. All right reserved.
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页码：1908 / 1912
页数：4
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