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

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Author(s): My Abdelkader Youssefi | Nawal Bounouader | Zouhair Guennoun | Jamal El Abbadi

Journal: International Journal of Communications, Network and System Sciences
ISSN 1913-3715

Volume: 06;
Issue: 06;
Start page: 316;
Date: 2013;
Original page

Keywords: OFDM | MIMO | Rayleigh Fading Channel | STBC | SFBC

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.
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Tango Jona
Tangokurs Rapperswil-Jona