迫零中继系统中的空间信道配对与映射  

Spatial Channel Pairing and Mapping in ZF Relaying Systems

作　　者：龙航[1] 旷婧华[1] 申山山[1] 郑侃[1] 王文博[1] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学),北京100876

出　　处：《北京邮电大学学报》2010年第5期84-88,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60802082);"十一五"国家重大科技专项项目(2009ZX03007-002-03)

摘　　要：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).Spatial channel pairing and mapping at the relay node are proposed to be used in the zero-forcing （ZF） relaying system to mitigate the relaying noise. A spatial channel pairing （mapping） matrix is presented between the backward filter and the forward filter at the relay node. The spatial channel pairing based on permutation matrices is used when several destination nodes with single-antenna are supported by the relay node, while the spatial channel mapping based on unitary matrices is used if a destination node with multiple antennas is supported. Analysis and simulation demonstrate that the noise power in the relaying signal decreases with the spatial channel pairing （mapping） and the received signal-to-noise ratio （SNR） of each data stream is improved.

关 键 词：中继系统 迫零 信道配对与映射 置换矩阵 酉阵 

分 类 号：TN929.53[电子电信—通信与信息系统]