Back
 IJCNS  Vol.6 No.6 , June 2013
Adaptive Switching between Space-Time and Space-Frequency Block Coded OFDM Systems in Rayleigh Fading Channel
Abstract: This work explores the performances of Space-Time and Space Frequency Coded Orthogonal Frequency Division Multiplexing (OFDM) with simple two branches transmit diversity scheme. The combination of multiple-antenna and orthogonal frequency division multiplexing (OFDM) provides reliable communications over frequency selective fading channels. We focus on the application of space-time block codes (STBC) and space-frequency block codes (SFBC) in OFDM systems over time-varying and frequency-selective channels. SFBC transmitter shows superior performance in fast varying channels while STBC shows better performance in frequency selective channels. A switching technique is presented that selects an appropriate transmission scheme between the STBC and SFBC assuming Rayleigh fading model.
Cite this paper: M. Youssefi, N. Bounouader, Z. Guennoun and J. Abbadi, "Adaptive Switching between Space-Time and Space-Frequency Block Coded OFDM Systems in Rayleigh Fading Channel," International Journal of Communications, Network and System Sciences, Vol. 6 No. 6, 2013, pp. 316-323. doi: 10.4236/ijcns.2013.66034.
References

[1]   Y. S. Cho, J. Kim, W. Y. Yang and C. G. Kang, “MIMO-OFDM Wireless Communications with MATLAB,” Wiley, 2010, 263 Pages.

[2]   F. Meucci, “Multiple Input Multiple Output: From Signal Processing to Protocol Gain,” Ph.D. Thesis, University of Florence, Florence, 2009.

[3]   S. M. Alamouti, “A Simple Transmit Diversity Technique for Wireless Communications,” IEEE Journal on Select Areas in Communications, Vol. 16, No. 8, 1998, pp. 1451-1458.

[4]   Z. S. Wu, “MIMO-OFDM Communication Systems: Channel Estimation and Wireless Location,” Louisiana State University, Ph.D. Thesis, Louisiana State University, Baton Rouge, 2006.

[5]   S. Kaiser, “Space Frequency Block Codes and Code Division Multiplexing in OFDM Systems,” Global Telecommunications Conference, San Francisco, 1-5 December 2003.

[6]   K. Lee, Y. Kim and J. Kang, “Adaptive Switching between Space-Time and Space-Frequency Block Coded OFDM Systems,” Military Communications Conference, Milcom, 2008, pp. 1-5.

[7]   L. Hanzo, J. Akhtman, M. Jiang and L. Wang, “MIMO-OFDM for LTE, WIFI and WIMAX,” Wiely IEEE Press, 2010, 591 Pages.

[8]   B. Sklar, “Rayleigh Fading Channels in Mobile Digital Communication Systems Part I: Characterization,” IEEE Communications Magazine, Vol. 35, No. 9, 1997, pp. 90-100.

[9]   D. Tse and P. Viswanath, “Fundamentals of Wireless Communication,” Cambrige University Press, Cambrige, 2005. doi:10.1017/CBO9780511807213

[10]   D. B. Lin, P. H. Chiang and H. J. Li, “Performance Analysis of Two-Branch Transmit Diversity Block Coded OFDM Systems in Time-Varying Multipath Rayleigh Fading Channels,” IEEE Transactions on Vehicular Technology, Vol. 54, No. 1, 2005, pp. 136-148. doi:10.1109/TVT.2004.838826

 
 
Top