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Turbo Perallel Space-Time Processing System with LDPC Code in MIMO Channel for High-Speed Wireless Communications  

조동균 (연세대학교 전기전자공학과 통신시스템연구실)
박주남 (연세대학교 전기전자공학과 통신시스템연구실)
황금찬 (연세대학교 전기전자공학과 통신시스템연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.10C, 2003 , pp. 923-929 More about this Journal
Abstract
Turbo processing have been known as methods close to Shannon limit in the aspect of wireless multi-input multi-output (MIMO) communications similarly to wireless single antenna communication. The iterative processing can maximize the mutual effect of coding and interference cancellation, but LDPC coding has not been used for turbo processing because of the inherent decoding process delay. This paper suggests a LDPC coded MIMO system with turbo parallel space-time (Turbo-PAST) processing for high-speed wireless communications and proposes a average soft-output syndrome (ASS) check scheme at low signal to noise ratio (SNR) for the Turbo-PAST system to decide the reliability of decoded frame. Simulation results show that the suggested system outperforms conventional system and the proposed ASS scheme effectively reduces the amount of turbo processing iterations without performance degradation from the point of average number of iterations.
Keywords
MIMO; BLAST; LDPC;
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