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A Simple Adaptive Switching Scheme between STBC-OFDM and SFBC-OFDM Systems
Keonkook LEE Youngok KIM Joonhyuk KANG
IEICE TRANSACTIONS on Communications
Publication Date: 2009/11/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
space-time/frequency block code (STBC/SFBC), OFDM, adaptive switching,
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In this letter, we propose a simple adaptive switching scheme to enhance the performance of space-time/frequency block coded OFDM systems (STBC/SFBC-OFDM). Since STBC-OFDM and SFBC-OFDM undergo severe performance degradation in time- and frequency-selective fading channels, respectively, performance enhancement can be achieved by switching between STBC-OFDM and SFBC-OFDM over a continuously varying channel environments. Thus, a new switching scheme based on the characteristics of the actual channel is proposed. The effectiveness of the proposed scheme is demonstrated by computer simulations.