摘要： 针对多输入多输出(MIMO)干扰信道中存在的收发机间和数据流间的共信道干扰,提出一种基于非线性Tomlinson-Harashima预编码的收发机联合设计方法。以最小化系统总均方误差为目标函数,通过交替迭代寻找局部最优解,从而得到接收矩阵、发射预编码矩阵和反馈矩阵。仿真结果表明,该方法能够有效抑制MIMO干扰信道中的共信道干扰,尤其是在发射机发送满数据流时,具有比线性收发机联合设计方法更优的差错性能。

关键词: 多输入多输出干扰信道, 非线性预编码, 收发机联合设计, 迭代优化, 总均方误差, 满数据流

Abstract: Aiming at the co-channel interference between transceivers and data streams in Multi-Input Multiple-Output(MIMO) interference channel,a joint nonlinear Tomlinson-Harashima Precoding(THP) transceiver design method is proposed to minimize the total Mean Square Error(MSE),and the local optimal solution is found by alternating iterations to obtain the receiver matrix,the transmit precoding matrix and the feedback matrix.Simulation results show that the proposed method can effectively suppress the co-channel interference in the MIMO interference channel,especially when the transmitter sends a full data stream,it can obtain better error performance than the joint linear transceiver design method.

Key words: Multi-Input Multiple-Output(MIMO) interference channel, nonlinear precoding, transceiver joint design, iterative optimization, total Mean Square Error(MSE), full data stream

中图分类号: 

• TP301.6