MIMO-OFDM中基于系统分解的VC子空间盲信道估计快速算法  

VC Subspace Blind Channel Estimation Fast Algorithm Based on System Division for MIMO-OFDM System

作　　者：牛德智[1] 王曙钊[1] 陈长兴[1] 张明亮[1] 

机构地区：[1]空军工程大学理学院,陕西西安710051

出　　处：《现代电子技术》2010年第21期9-12,共4页Modern Electronics Technique

基　　金：国家863计划资助项目(2007AAJ129);陕西省电子信息综合集成重点实验室资助项目(200906B)

摘　　要：研究MIMO-OFDM系统中的盲信道估计问题。将OFDM系统中的子空间盲信道估计方法引入到MIMO-OFDM系统中,建立了带有虚拟载波的系统数据传输模型。针对MIMO-OFDM系统VC子空间盲信道估计算法复杂度高的特点,提出了一种该算法下基于系统分解的快速方法。仿真实验结果表明,算法在RMSE性能上稍差于原算法,但却显著降低了信道估计算法的复杂度,对快速信道估计应用方面具有一定的指导意义。The problem of blind channel estimation in MIMO-OFDM system is studied in the paper.The data transmission model of system with virtual carrier（VC） is built by the aid of the method to introduce the subspace-based blind channel estimation used in OFDM into MIMO-OFDM system.Aiming at high complexity of VC subspace blind channel estimation algorithm for MIMO-OFDM system,a fast method based on the system division and the algorithm is proposed.The simulation experiment results show that RMSE performance of the fast method is not as good as primary algorithm,but it makes the algorithm complexity become lower to a high degree,which is meaningful for the application of fast channel estimation.

关 键 词：MIMO-OFDM 子空间 盲信道估计 虚拟载波 系统分解 

分 类 号：TN911-34[电子电信—通信与信息系统]