Abstract：The Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) technique is widely accepted as the most prospective technique for broadband wireless communications. Previous studies have put emphasis on how to utilize space channels between receiving and emitting antennas. For the first time, a new conception of wide-sense space channels is proposed which combined antenna channels and beam channels. With no increasing the number of antennas, wide-sense space channels can increase the number of space channels. Under the condition of the multi-paths number was greater than the array elements number, the correlations among frequency responses of wide-sense space channels are very weak, hence, the diversity, coding and multiplexing gain of Space-Frequency Code (SFC) can be increased, so wide-sense space channels can improve the performance of MIMO-OFDM systems.
2006, Vol. 28 
