MIMO中继系统中基于失真信道的联合收发机设计

摘要

In MIMO relay system, the scheme of designing the joint linear transmitters and the receiver considering the joint source, relay and destination based on perfect channel state information ( CSI) is derived. Based on this, the paper considering the channel estimate errors modeled as Gaussian random variables and under power constraint at both the source and the relay node, the transmitters and receiver could be realized through a joint iterative algorithm. Compared with the existing methods, the results show that the proposed scheme could effectively improve the BER performance and reduce the minimum mean square error of the system.%在MIMO中继系统中,基于完全信道状态信息的基站、中继节点和终端联合收发机设计方案能够改善系统的误比特率性能,在放大转发(AF)中继的基础上提出了一种基于不完全信道状态信息的联合收发机设计方案.新方案在基站和中继节点的功率都受限条件下,将信道估计误差建模为高斯随机变量,以最小均方误差(MMSE)为准则,采用迭代算法,得到了基站预编码矩阵、中继转发矩阵和终端解码矩阵.该方案与不考虑信道估计误差的方案相比,能够有效地改善系统的均方误差和误比特率性能.