一种基于LMMSE滑动窗的信道估计算法  

Sliding Window Channel Estimation Algorithm Based on LMMSE

作　　者：刘佳[1] 王琼[1] 张朝霞[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电视技术》2014年第5期136-139,共4页Video Engineering

基　　金：国家新一代宽带无线移动通信网科技重大专项(2012ZX03001-012)

摘　　要：LTE-A下行传输中采用的多达8天线端口的增强型MIMO技术,为了保证对LTE系统的后向兼容以及确保UE对最大8天线端口和反馈更大的带宽信道状态信息(CSI),引入了新的参考信号CSI-RS。分析了LMMSE信道估计算法,提出了一种基于LMMSE滑动窗的信道估计算法。仿真结果表明,该算法既节约了导频资源占用率,又提高了系统的发送效率。Up to eight antenna ports enhanced MIMO technology is adopted in the LTE-A downlink transmission. In order to ensure backward compati-bility with the LTE system, and the UE can be a maximum of eight antenna ports and feedback larger bandwidth of the channel state information （ CSI）, a new reference signal CSI-RS is introduced. LMMSE channel estimation algorithm research is analyzed and the LMMSE sliding window-based channel estimation algorithm is proposed. The simulation results show that this algorithm could save the pilot resource utilization, and improve the transmission ef- ficiency of the system.

关 键 词：LTE-A 信道估计 CSI-RS LMMSE 

分 类 号：TN929.5[电子电信—通信与信息系统]