为了解决迫零(ZF)中继协议转发噪声过大的问题,提出在ZF中继协议中加入空间信道配对与映射.在中继节点的反向滤波器之后、前向滤波器之前增加空间信道配对(映射)矩阵.置换矩阵作为空间信道配对矩阵,应用于多个单天线目标节点时.酉阵作为空间信道映射矩阵,应用于单个多天线目标节点时.理论分析和仿真结果证明,空间信道配对与映射降低了转发信号中的噪声功率,提高了每个数据流的接收信噪比(SNR). In order to solve the problem of ZF relay protocol forwarding noise is too large, it is proposed to add space channel pairing and mapping in the ZF relay protocol.After the relay node reverse filter, before the forward filter to increase spatial channel When the matrix is ​​applied to multiple single-antenna target nodes, the unitary matrix is ​​used as a spatial channel mapping matrix when applied to a single multi-antenna target node. Theoretical analysis and simulation results show that the spatial channel Pairing and mapping reduce the noise power in the forwarded signal and increase the received signal-to-noise ratio (SNR) for each data stream.