THE ADAPTIVE CHANNEL ESTIMATION FOR STBC-OFDM SYSTEMS

Abstract

In this paper, we propose adaptive channel estimation methods based on LMS and RLS for orthogonal STBC-OFDM systems with three transmit antennas. The performance of the proposed algorithms is obtained in the frequency selective channels using Hiperlan/2 characteristics.

Keywords

• Space-time block coded OFDM, adaptive channel estimation

References

1. Stuber, G., “Broadband MIMO-OFDM Wireless Communications”, IEEE Transaction on Signal Processing, Vol: 92, pp. 271-294,2004.
2. Foschini, G.F., and Gans, M. J., “On limits of wireless communications in a fading environment when using multiple antennas”, Wireless Personal Communications, Vol.6, pp.311-335, 1998.
3. Cimini, L. J., “Analysis and simulation of a digital mobile channel using orthogonal frequency multiplexing”, IEEE Transaction on Communication, Vol.33, pp. 665-675, 1995.
4. Lee, K.F., Williams, O.B., “Space-Time Coded Transmitter Diversity Technique for Frequency Selective Fading Channels”, Proc. IEEE Sensor Array and Multichannel Signal Processing Workshop, pp.149-152, March 2000.
5. Bolcskei, H. and Paulraj, A. J., “Spacefrequency coded broadband {OFDM} systems”, Proceedings of IEEE WCNC, Vol.1, pp.1-6, 2000.
6. Tarokh, V., Jafarkhani, H., Calderband, A. R., “Space-time block coding for wireless communications: performance results”, IEEE J. Select. Areas Comm., Vol.17, No.3, pp.451-460, March 1999.
7. Alamouti, S. M., “A simple transmitter diversity scheme for wireless communications”, IEEE J. Select. Areas Commun., c.16, no.8, s.1451-1458, 1998.
8. Tarokh, V., Jafarkhani, H., Calderbank, A. R., “Space-Time Block Codes from Orthogonal Designs”, IEEE Trans. on Information Theory, Vol.45, No.5, July 1999.

9. Hochwald, B. M., Marzetta, T. L. and Papadias, C. B., “A Transmitter diversity scheme for wideband CDMA systems based on spacetime spreading”, IEEE Journal on Selected Areas on Communication, Vol.19, No.5, pp.48-60, 2002.
10. Liu Z., Ma, X. Giannakis, G.B., “Spacetime coding and Kalman filtering for time selective fading channels”, IEEE Transaction on Communications, Vol.50, pp.183-186, 2002.
11. Enescu, M., Koivunen V., “Time-varying Channel Tracking for Space-Time Block Coding”, IEEE Semi-annual Vehicular Technology Conference, VTC Spring, May 6-9 2002.
12. Haykın,S., Adaptive Filter Theory, 4th Edition, Prentice Hall, 2002.
13. Komninakis, C. Fragouli, C., Sayed, A. H., Wesel, R. D., “Multi-input Multi-output Fading channel tracking and equalization using Kalman estimation”, IEEE Journal Selected Areas on Communications, Vol.20, pp. 1211-1226, 2002.
14. Roman, T., Enescu, M., Koivunen, V., “Time domain method for tracking dispersive channels in MIMO-OFDM systems”, Proceeding of ICASSP, pp. 393-396, 2003.
15. Schafhuber, D., Matz, G., Hlawatsch, F., “Kalman tracking of time varying channels in wireless MIMO-OFDM systems”, Proceeding of ASILOMAR, pp. 1261-1265, 2003
16. Z. Cheng and D. Dahlhaus, “Time versus frequency domain channel tracking using Kalman filtering for OFDM systems with antenna array”, Proceeding of VTC-Spring, pp. 651-655, 2003.
17. ETSI Broadband Radio Access Networks, Hiperlan/2 Technical Spec, Physical Layer.
18. ETSI Normalization Committee, "Channel Models for Hiperlan/2 in Different Indoor Scenarios", France, 1998.
19. Pop, M.F., Beaulieu, N.C. “Limitation of Sum-of-Sinusoids Fading Channel Simulators”, IEEE Trans. On Communications, Vol.49, No.4, 2001.