上行多用户MIMO中继系统中基于不完全信道状态信息的预编码算法

发布时间：2018-05-27 21:17

本文选题：上行多用户MIMO中继 + 放大转发　；参考：《电子与信息学报》2016年08期

【摘要】：论文研究了存在信道估计误差及天线相关条件下,上行多用户MIMO中继系统的预编码问题,目标是提升系统的误比特率性能。针对基于放大转发中继技术的上行多用户MIMO中继系统,考虑源-中继和中继-目的端信道中存在的信道估计误差及天线相关,提出一种基于不完全信道状态信息(Channel State Information,CSI)的预编码设计方案。首先根据最小均方误差(Minimum Mean-Squared Error,MMSE)准则设计代价函数,以发射端和中继端最大功率为约束条件,通过理论推导求得中继端和发射端的线性预编码矩阵,最后采用迭代下降法得到接收端处理矩阵的闭式解。数值仿真结果表明,在存在信道估计误差和天线相关的条件下,与现有算法相比,所提算法能有效降低系统的误比特率。
[Abstract]:In this paper, the precoding problem of uplink multi-user MIMO relay system with channel estimation error and antenna correlation is studied. The goal is to improve the BER performance of the system. For uplink multi-user MIMO relay system based on amplification relay technology, the channel estimation error and antenna correlation in source-relay and relay-destination channel are considered. A precoding scheme based on incomplete channel state information channel State information (CSI) is proposed. Firstly, the cost function is designed according to the minimum mean square error (MMSE) criterion. The linear precoding matrix of the relay and the transmitter is obtained by theoretical derivation with the maximum power at the transmitter and the relay as the constraint condition. Finally, the closed solution of the receiver processing matrix is obtained by iterative descent method. Numerical simulation results show that the proposed algorithm can effectively reduce the bit error rate (BER) of the system under the condition of channel estimation error and antenna correlation.
【作者单位】：江苏省物联网与控制技术重点实验室;南京航空航天大学电子信息工程学院;
【基金】：中国博士后科学基金(2013M541661) 中央高校基本科研业务费专项资金资助(NS2016044)~~
【分类号】：TN919.3

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