摘要
在多输入多输出系统中,当收发端已知非理想信道状态信息时,提出了一种基于最小化均方误差准则的非线性收发机设计方法,其结构基于汤姆林森-哈拉希玛预编码(THP).首先研究了收发信号的均方误差表达式,并将其转换为预编码矩阵的函数;然后,通过最优化及矩阵论方法最小化均方误差的下界,求解最优预编码矩阵以及下界的闭式解,进而获得整个非线性收发机矩阵.仿真结果表明,该方法性能优于现有的线性收发机设计和经典的THP收发机设计.
A design method for nonlinear transceiver with Tomlinson-Harashima precoding（THP） struc ture was proposed based on minimum mean square error （MSE） criterion, when the transceiver knows the imperfect channel state information （CSI） for multiple-input multiple-output （MIMO） system. The MSE is derived firstly, and then transformed as the function of only one variable being precoding matrix. By minimizing the lower bound of MSE using optimization and matrix theory, the optimal precoding matrix and the closed-form of the lower bound are obtained, so that the total non-linear transceiver matrices are solved. The simulation results show that the proposed method outperforms the existing linear transceiver and the classic THP transceiver.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2012年第11期1806-1810,1815,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(60905065)
交通部基础研究项目(2010318810019)
关键词
非线性收发机
非理想信道状态信息
最小化均方误差
空间相关
non-linear transceiver
imperfect channel state information
minimum mean square error（MSE）
spatial correlation
