Semi-blind Channel Estimation Based on Subspace Identification in OFDM System
HU Mao-kai · Modern Electronics Technique · 2010
In OFDM system,as the blind channel estimation has deficiencies of large qualities of calculation,slow convergence rate and bad precision of estimation,and the traditional means has deficiency of weak utilization of the channel,the semi-blind channel estimation based on the subspace identification is introduced in details.The estimation,which employs characteristics of the matrix of received signal to estimate the channel,it is a balance between the data transportation efficiency and convergence rate.The emulation in Matlab software shows that the means can improve the precision of estimation and reduce NRMSE of the system for a certain extent.The simulation results may be of reference value for the further research on channel-estimation problem.