Optimal Training Design and Placement for MIMO Orthogonal Frequency Division Multiplexing Channel Estimation  

作　　者：林成裕 钱良 张文军 徐友云 李洪烈 

机构地区：[1]Institute of Image Communication and Information Processing,Shanghai Jiaotong University [2]Shanghai Key Laboratory of Digital Media Processing and Transmissions,Shanghai Jiaotong University [3]Qingdao Branch of Naval Aeronautical Engineering Institute

出　　处：《Journal of Shanghai Jiaotong university(Science)》2010年第1期58-63,共6页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China (Nos. 60332030 and 60625103);the Science and Technology Commission of Shanghai Municipality (STCSM) (No. 05DZ22102);the National High Technology Research and Development Program(863) of China (No. 2007AA01Z237)

摘　　要：This paper deals with optimal training design and placement over multiple orthogonal frequency division multiplexing(OFDM) symbols for the least squares(LS) channel estimation in multiple-input multipleoutput(MIMO) OFDM systems.First,the optimal pilot sequences over multiple OFDM symbols are derived by co-cyclic Jacket matrices based on the minimum mean square error(MSE) of the LS channel estimation.Then,an enhanced channel estimation method using sliding window is proposed to improve further the performance for the optimal pilot sequences in fast-varying channels.Simulation results show that the enhancedmethod can efficiently improve the performances for the optimal pilot sequences over two and four OFDM symbols,especially in fast-varying channels.This paper deals with optimal training design and placement over multiple orthogonal frequency division multiplexing （OFDM） symbols for the least squares （LS） channel estimation in multiple-input multipleoutput （MIMO） OFDM systems. First, the optimal pilot sequences over multiple OFDM symbols are derived by co-cyclic Jacket matrices based on the minimum mean square error （MSE） of the LS channel estimation. Then, an enhanced channel estimation method using sliding window is proposed to improve further the performance for the optimal pilot sequences in fast-varying channels. Simulation results show that the enhanced method can efficiently improve the performances for the optimal pilot sequences over two and four OFDM symbols, especially in fast-varying channels.

关 键 词：co-cyclic Jacket matrix optimal pilot sequences channel estimation multiple-input multiple-output orthogonal frequency division multiplexing （MIMO-OFDM） 

分 类 号：TN929.5[电子电信—通信与信息系统] TN929.533[电子电信—信息与通信工程]