Performance Analysis of Adaptive MIMO-OFDM System with Imperfect Channel Information

As adaptive MIMO-OFDM system can greatly improve the spectral efficiency, many people are studying it. The imperfect Channel State Information (CSI), which is caused by two major factorschannel estimation error and CSI delay, and their impacts on the system frequency efficiency are studied. Simulation results show that the spectral efficiency loss due to channel estimation error is relatively small when the channel estimation error is less than-12dB and the system will be less sensitive to CSI delay when channel prediction is used.