基于准正交空时码的最优线性预编码矩阵设计  

Optimal Linear Precoding Design Based on the Quasi-Orthogonal STBC

作　　者：刘雪芳[1] 傅丰林[1] 

机构地区：[1]西安电子科技大学通信工程学院,西安710071

出　　处：《电子与信息学报》2008年第2期401-403,共3页Journal of Electronics & Information Technology

摘　　要：为了充分利用信道信息改善应用准正交空时分组码的MIMO系统的性能,该文提出了将预编码矩阵和准正交空时分组码相结合的发射机制。信息在经过准正交空时分组码编码后,要经过线性预编码矩阵进行处理,才可以从发射天线发送。文中的预编码矩阵设计利用了MIMO信道的非零均值矩阵和相关矩阵,并采用成对差错概率作为其最优设计准则。仿真结果表明,相对于未经过预编码矩阵的系统,新系统的误码率性能有明显改善。For improving the performance of MIMO system with quasi-orthogonal STBC exploiting the channel knowledge, a new transmitter scheme combining the linear precoding matrix is proposed. Before sending out from the transmit antennas, the information is sent into the space-time encoder, then is processed by a precoder matrix. Exploiting the channel correlation and mean, the linear precoder is designed based on the Pair-wise Error Probability （PEP）. Simulation results show that significant gain in BER of the new system can be obtained compared with the unprecoded system.

关 键 词：准正交空时分组码 线性预编码矩阵 信道相关 成对差错概率 

分 类 号：TN911.22[电子电信—通信与信息系统]