[IEEE Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (IEEE Cat. No.04EX710) - Shanghai, China (2004.05.31-2004.06.2)] Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (IEEE Cat. No.04EX710) - Research on an iterative algorithm of LS channel estimation in MIMO OFDM systems