Efficient Time/Frequency Permutation of MIMO-OFDM Systems through Independent and Correlated Nakagami Fading Channels

.
DOI: 10.4236/ijcns.2009.29105   PDF   HTML     4,309 Downloads   8,158 Views  

Abstract

Space-Time Frequency (STF) codes for MIMO-OFDM over block-fading channel can achieve rate?? Mt and full-diversity Mt Mr Mb L which is the product of the number of transmit antennas Mt, receive antennas Mr, fading blocks Mb and channel taps L. In this article, time permutation is proposed to provide independent block-fading over Jake’s Doppler power spectrum channel. Moreover, we show the performance variations of STF code as channel delay spread changes. Therefore, we introduce a frequency/time permutation technique in order to remove the frequency correlation among sub-carriers, which subsequently increases the coding gain and achieves maximum diversity. Finally, the symbol error rate (SER) performance of the proposed time/frequency permuted STF codes over independent and correlated MIMO antenna branches under Nakagami fading channel is simulated. We show that the proposed systems provide better performance and more robust to large values of antennas correlation coefficients in comparison with the un-interleaved one.

Share and Cite:

K. A. SAAIFAN and E. K. AL-HUSSAINI, "Efficient Time/Frequency Permutation of MIMO-OFDM Systems through Independent and Correlated Nakagami Fading Channels," International Journal of Communications, Network and System Sciences, Vol. 2 No. 9, 2009, pp. 903-911. doi: 10.4236/ijcns.2009.29105.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] W. Su, Z. Safar, and K. J. R. Liu, “Full-rate full-diversity space: Frequency codes with optimum coding advantage,” IEEE Transactions on Information Theory, Vol. 51, pp. 229–249, January 2005.
[2] T. Kiran and B. S. Rajan, “A systematic design of high-rate full-diversity space frequency codes for MIMO-OFDM systems,” in Proceedings IEEE International Symposium Information Theory, pp. 2075–2079, September 2005.
[3] H. E. Gamal and A. R. Hammons Jr., “On the design of algebraic space-time codes for MIMO block fading channels,” IEEE Transactions on Information Theory, Vol. 49, pp. 151–163, January 2003.
[4] M. Fozunbal, S. W. McLaughlin, and R. W. Schafer, “On space-time-frequency coding over MIMO-OFDM systems,” IEEE Transactions on Wireless Communication, Vol. 4, pp. 320–331, January 2005.
[5] W. Su, Z. Safar, and K. J. R. Liu, “Towards maximum achievable diversity in space, time, and frequency: Performance analysis and code design,” IEEE Transactions on Wireless Communication, Vol. 4, pp. 1847–1857, July 2005.
[6] W. Zhang, X. G. Xia, and P. C. Ching, “High-Rate full- diversity space-time-frequency codes for broadband MIMO block fading channels,” IEEE Transaction on Communication, Vol. 55, pp. 25–34, January 2007.
[7] E. Viterbo and J. Boutros, “A universal lattice code decoder for fading channels,” IEEE Transactions on Information Theory, Vol. 45, No. 5, pp. 1639–1642, July 1999.
[8] M. O. Damen, A. Chkeif, and J. C. Belfiore, “Lattice code decoder for space-time codes,” IEEE Communication Letters, Vol. 4, No. 5, pp. 161–163, May 2000.
[9] W. Zhang, X. G. Xia, and K. B. Letaief, “Space-time/ frequency coding for MIMO-OFDM in next generation broadband wireless systems,” IEEE Wireless Communications Magazine, Vol. 14, No. 3, pp. 32–43, June 2007.
[10] Y. Li, L. J. Cimini, and N. R. Sollenberger, “Robust channel estimation for OFDM systems with rapid dispersive fading channels,” IEEE Transactions on Communication, Vol. 46, No. 7, pp. 902–915, July 1998.
[11] X. Wang and K. J. R. Liu, “Channel estimation for multi- carrier modulation systems using a time-frequency polynomial model,” IEEE Transactions on Communication, Vol. 50, No. 7, pp. 1045–1048, July 2002.
[12] M. Nakagami, “The m-distribution: A general formula of intensity distribution of rapid fading”, in W. C. Hoffman (ed.), Statistical Methods in Radio Wave Propagation, Pergamon Press, New York, pp. 3–36, 1960.
[13] W. C. Jakes (2nd), “Microwave mobile communications,” IEEE Press, New York, 1994.
[14] K. I. Pedersen, J. B. Andersen, J. P. Kermoal, and P. E. Mogensen, “A stochastic multiple-input multiple-output radio channel model for evaluation of space-time coding algorithms,” In Proceedings of Vehicular Technique Conference, pp. 893–897, September 2000.
[15] H. E. Gamal and M. O. Damen, “Universal space-time coding,” IEEE Transactions on Information Theory, Vol. 49, pp. 1097–1119, May 2003.
[16] W. Zhang, X. G. Xia, P. C. Ching, and H. Wang, “Rate two full-diversity space-frequency code design for MIMO- OFDM,” Proceedings of IEEE Workshop Signal Process, Advanced Wireless Communications, New York, pp. 321–325, June 2005.

  
comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.