CAJ | 학술논문

本文概述了MIMO—OFDM系统的信道估计方法，即非盲信道估计、盲信道估计和半盲信道估计．非盲信道估计方法收敛速度快，简单且易实现，但信道利用率和系统的传输效率低；盲信道估计方法可有效节省系统带宽，提高频谱利用率，但此方法复杂度较大．而半盲信道估计方法是非盲信道估计和盲信道估计的一个折衷方法，能够很好的兼顾实现复杂度与估计性能．因此，半盲信道估计方法对未来MIMO—OFDM系统的信道估计发展趋势明显，将会日益受到人们的重视．
본문개술료MIMO—OFDM계통적신도고계방법，즉비맹신도고계、맹신도고계화반맹신도고계．비맹신도고계방법수렴속도쾌，간단차역실현，단신도이용솔화계통적전수효솔저；맹신도고계방법가유효절성계통대관，제고빈보이용솔，단차방법복잡도교대．이반맹신도고계방법시비맹신도고계화맹신도고계적일개절충방법，능구흔호적겸고실현복잡도여고계성능．인차，반맹신도고계방법대미래MIMO—OFDM계통적신도고계발전추세명현，장회일익수도인문적중시．
This paper summarizes the MIMO-OFDM system channel estimation method, that is, non-blind channel estimation, blind channel estimation and semi-blind channel estimation. The non-blind channel estimation method convergence rate fast, simple and easy to achieve, but the channel utilization ratio and the system transmission efficiency is low; blind channel estimation method can effectively save system bandwidth, improve spectra utilization ratio, but the complexity of this method is greater. The semi-blind channel estimation method for non-blind channel estimation and blind channel estimation is a compromise to achieve a good balance between complexity and estimation performance. Therefore, the semi-blind channel estimation method for MIMO-OFDM system channel estimation in the future developmental trend obvious will be increasingly subject to attention.