一种空时相关信道下的鲁棒SLNR预编码算法  

A robust SLNR precoding algorithm in spatial and temporal correlated channel

作　　者：王丽[1,2] 刘世界 屈永传 胡捍英[1] 

机构地区：[1]信息工程大学五院,河南郑州450002 [2]信息工程大学昆明分院,云南昆明650231

出　　处：《太赫兹科学与电子信息学报》2014年第6期826-831,共6页Journal of Terahertz Science and Electronic Information Technology

摘　　要：为了改善存在信道误差、空时相关条件下多用户多入多出(MIMO)系统的性能,给出了一种基于信漏噪声比(SLNR)的鲁棒预编码算法。通过推导空时相关信道环境下信道向量的条件均值和协方差,分别建立了发送端信道状态信息(CSIT)和接收端信道状态信息(CSIR)模型。在此模型基础上,推导了收发两端信道状态信息(CSI)均不理想情况下的鲁棒SLNR预编码以及相应的接收滤波矩阵。仿真结果表明,该算法对空间相关性、时间相关性以及信道误差均具备一定的鲁棒性。A robust precoding algorithm based on Signal to Leakage Noise Ratio（SLNR） is put forwardin order to improve the performance of multiuser Multiple Input Multiple Output（MIMO） system in spatialand temporal correlated channel environment with channel error. Conditional mean and covariance ofchannel vector is derived considering spatial correlation and temporal, then the Channel State Informationat the Transmitter（CSIT） and the Channel State Information at the Receiver（CSIR） are modeled. Based onthese models, a robust SLNR precoding algorithm is derived when Channel State Information（CSI） at bothends is imperfect and not equivalent, and the corresponding receiving filters are also discussed.Simulation results show that the proposed robust SLNR precoding algorithm possesses robustness againstchannel error, spatial correlation and temporal correlation.

关 键 词：用户预编码 空间相关信道 时间相关信道 鲁棒性 

分 类 号：TN919.3[电子电信—通信与信息系统]