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Improved Super-Orthogonal Space Time Codes for Fast Rayleigh Fading Channels  

Kim, Chang-Joong (홍익대학교 대학원 전파통신공학과 디지털 통신 연구실)
Heo, Seo-Weon (홍익대학교 공과대학 전자전기공학부)
Lee, Ho-Kyoung (홍익대학교 공과대학 전자전기공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.9C, 2007 , pp. 820-825 More about this Journal
Abstract
Super-orthogonal space-time trellis code (SOTTC) uses the expanded set of the orthogonal space-time block code to obtain coding gain and diversity gain without loss of transmit rate. In SOSTTCs, signal set expansions are performed by rotating the first column of the code matrix. The rotating phases used previously were selected to avoid the signal constellation expansion rather than the performance improvement. In this paper, we make a design criterion to select the proper rotating phase to improve the performance of SOSTTCs for fast Rayleigh fading channels. In addition, we design improved SOSTTCs by using the proper rotating phase. Simulation results are also provided to confirm our SOSTTCs are superior to the previous SOSTTCs in the view of BER performance.
Keywords
Space-time code; TCM; Fading channel; MIMO antenna system; SOSTTC;
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