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Abstract: This paper addresses the problem of channel estimation for broadband MIMO-OFDM systems. An improved channel estimator with multipath time delay detection and channel gain estimation is proposed. In the algorithm, we used the correlation of the channel taps and a well-designed adjustment scheme to increase the accuracy of the time delay detection. The most attractive advantage is that the complicated matrix calculation is replaced by search steps which can acquire the channel order and estimate the channel parameters without significantly increasing the complexity of the system. Computer simulation showed that the proposed algorithm can track the time delays adaptively and, consequently, improve the channel estimation performance.

[1] Beek, J.J.V.D., Edfors, O., Sandell, M., Wilson, S.K., Börjesson, P.O., 1995. On Channel Estimation in OFDM Systems. IEEE VTC’95Fall, Chicago, IL, p.815-819.

[2] Chen, R., Letaief, K.B., 2002. Channel estimation for space time coded OFDM systems in non-sample-spaced multipath channels. IEEE WCNC’02, 1:61-66.

[3] Chen, H.H., Chang, Y.N., 2003. A new pilot-added CDMA multiuser detection scheme-SCCS detector & its performance in multipath channels. IEEE ISCC’03, 2:925-929.

[4] Ebeling, C., Fisher, C., Xing, G., Shen, M., Liu, H., 2004. Implementing an OFDM receiver on the RaPiD reconfigurable architecture. IEEE Transactions on Computers, 53(11):1436-1448.

[5] Han, B., Gao, X., You, X., Costa, E., Haas, H., 2002. A novel channel estimation method for OFDM systems in multipath fading. IEEE GLOBALCOM’02, 1:696-700.

[6] Hoeher, P., Kaiser, S., Robertson, P., 1997. Two-dimensional pilot-symbol aided channel estimation by wiener filtering. IEEE ICASSP’97, 3:1845-1848.

[7] Li, Y., 2002. Simplified channel estimation for OFDM systems with multiple transmit antennas. IEEE Transactions on Wireless Communications, 1(1):67-75.

[8] Li, Y., Seshadri, N., Ariyavisitakul, S., 1999. Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels. IEEE Selected Areas in Communications, 17(3):461-471.

[9] Moon, J.K., Choi, S.I., 2000. Performance of channel estimation methods for OFDM systems in a multipath fading channel. IEEE Transactions on Consumer Electronics, 46(1):161-170.

[10] Nicoli, M., Simeone, O., Spagnolini, U., 2003. Multislot estimation of fast-varying space-time communication channels. IEEE Transactions on Signal Processing, 51(5):1184-1195.

[11] Stuber, G.L., Barry, J.R., Mclaughlin, S.W., Li, Y., Ingram, M.A., Pratt, T.G., 2004. Broadband MIMO-OFDM wireless communications. Proceedings of the IEEE, 92(2):271-294.

[12] Yang, B.G., Letaief, K.B., Cheng, R.S., Cao, Z., 2001. Channel estimation for OFDM transmission in multipath fading channels based on parametric channel modeling. IEEE Transactions on Communications, 49(3):467-479.

[13] Zheng, L.Z., Tse, D.N.C., 2003. Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels. IEEE Transactions on Information Theory, 49(5):1073-1096.