A Comparison of Orthogonal and Quasi-Orthogonal Space-Time Block Codes for Fast Fading Channels

Jaekwon KIM
Yong-Soo CHO

IEICE TRANSACTIONS on Communications   Vol.E88-B    No.7    pp.3069-3072
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.7.3069
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
space-time block code,  MIMO,  transmit diversity,  fast fading,  

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This letter compares orthogonal space time codes and quasi-orthogonal codes when the wireless channels are fast fading. It is well known that a orthogonal space-time code is better than a quasi-orthogonal code in high signal-to-noise ratio (SNR) range and that a quasi-orthogonal code is better in low SNR range. In this letter, we show that a quasi-orthogonal space-time code is a better choice even in high SNR range when the channels are fast fading.