Spacetime coded eigenbeamforming for downlink frequency-selective correlated fading channels  

作　　者：李勇朝 廖桂生 仝文宁 

机构地区：[1]National Key Laboratory for Radar Signal Processing, Xidian University [2]School of Humanities and Arts, Xidian University

出　　处：《Journal of Shanghai University(English Edition)》2006年第6期500-505,共6页上海大学学报（英文版）

基　　金：Project supported by National Natural Science Foundation ofChina (Grant No .60172028) ,;Natural Science Foundation ofShanxi Province(Grant No .2004F45)

摘　　要：To improve the performance of space-time coding over downlink frequency-selective correlated fading channels, a novel transmission scheme combining eigenbeamfoming and OFDM is proposed. Provided that the channel correlated statistics are available at the transmitter, the wideband correlated fading channels can be converted into an independent FIR channel with 2 transmitting antennas and N receiving antennas by eigenbeamforming and dimension reduction. OFDM is utilized to convert the FIR channel into a group of independent parallel subchanneis to carry space-time codes. With the new structure, the performance of space-time coding over downlink wideband correlated fading channels is greatly improved and the system complexity is reduced. Validity of the proposed system is verified by simulations under different conditions. Comparison between the new structure and an available structure is made both theoretically and computationslly.To improve the performance of space-time coding over downlink frequency-selective correlated fading channels, a novel transmission scheme combining eigenbeamfoming and OFDM is proposed. Provided that the channel correlated statistics are available at the transmitter, the wideband correlated fading channels can be converted into an independent FIR channel with 2 transmitting antennas and N receiving antennas by eigenbeamforming and dimension reduction. OFDM is utilized to convert the FIR channel into a group of independent parallel subchanneis to carry space-time codes. With the new structure, the performance of space-time coding over downlink wideband correlated fading channels is greatly improved and the system complexity is reduced. Validity of the proposed system is verified by simulations under different conditions. Comparison between the new structure and an available structure is made both theoretically and computationslly.

关 键 词：frequency-selective correlated fading OFDM space-time coded eigenbeamforming. 

分 类 号：TN911.2[电子电信—通信与信息系统]