Abstract: MIMO-OFDM system is a promising scheme for achieving high data rates over the future broadband wireless networks.For traditional MIMO-OFDM, the frequency diversity is not fully utilized.In this paper a novel iterative detection scheme for the MIMO-OFDM system which exploits both frequency and spatial diversity is proposed.Through iterative processing, the extrinsic information can be used to exploit the spatial-frequency diversity of the rich scattering environment, thereby achieving the capacity limit of the system.And for further improvement of the system's performance, a soft interference cancellation based receiver is presented, too. The analysis and simulation results show that the proposed detection scheme achieves an enhanced performance.

Key words: future wireless communication system, iterative detection, MIMO-OFDM, soft interference cancellation