International Journal of Communications, Network and System Sciences

Volume 6, Issue 6 (June 2013)

ISSN Print: 1913-3715   ISSN Online: 1913-3723

Google-based Impact Factor: 1.39  Citations  

Adaptive Switching between Space-Time and Space-Frequency Block Coded OFDM Systems in Rayleigh Fading Channel

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DOI: 10.4236/ijcns.2013.66034    6,466 Downloads   9,743 Views  Citations

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.

Share and Cite:

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.

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