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Mathematical Problems in Engineering Volume 2017 ,2017-04-12
Linear Precoding Scheme Design for MIMO Two-Way Relay Systems with Imperfect Channel State Information
Research Article
Xiao-min Chen 1 Jun-xu Su 1 Qiu-ming Zhu 1 Xu-jun Hu 1 Zhu Fang 1
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DOI:10.1155/2017/5164681
Received 2016-11-16, accepted for publication 2017-03-01, Published 2017-03-01
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摘要

The aim of this paper is to investigate a linear precoding scheme design for a multiple-input multiple-output two-way relay system with imperfect channel state information. The scheme design is simplified as an optimal problem with precoding matrix variables, which is deduced with the maximum power constraint at the relay station based on the minimum mean square error criterion. With channel feedback delay at both ends of the channel and the channel estimation errors being taken into account, we propose a matrix decomposition scheme and a joint iterative scheme to minimize the average sum mean square error. The matrix decomposition method is used to derive the closed form of the relay matrix, and the joint iterative algorithm is used to optimize the precoding matrix and the processing matrix. According to numerical simulation results, the matrix decomposition scheme reduces the system bit error rate (BER) effectively and the joint iterative scheme achieves the best performance of BER against existing methods.

授权许可

Copyright © 2017 Xiao-min Chen et al. 2017
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

图表

Diagram of MIMO two-way relay system.

BER versus SNR with σΣ2=0.01.

BER versus SNR with fdτ=0.05.

BER performance comparisons with different iterations.

BER performance comparisons with different σΣ2.

BER performance comparisons with different fdτ.

通讯作者

Xiao-min Chen.College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China, nuaa.edu.cn.chenxm402@nuaa.edu.cn

推荐引用方式

Xiao-min Chen,Jun-xu Su,Qiu-ming Zhu,Xu-jun Hu,Zhu Fang. Linear Precoding Scheme Design for MIMO Two-Way Relay Systems with Imperfect Channel State Information. Mathematical Problems in Engineering ,Vol.2017(2017)

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