Computationally Efficient Signal Detection for STBC-OFDM Systems in Fast-Fading Channels

Kyu In LEE  Jaekwon KIM  Yong Soo CHO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.10   pp.2964-2968
Publication Date: 2007/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.10.2964
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDM,  STBC,  fast fading,  ML,  MML,  

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Summary: 
In this letter, we propose a novel signal detection method that matches maximum likelihood (ML) performance but requires much less computational complexity than ML detection. When the well-known linear decoding method is used for space-time block coded (STBC) OFDM systems in fast-fading channels, co-channel interference (CCI) as well as inter-carrier interference (ICI) occurs. A maximum likelihood (ML) method can be employed to deal with the CCI; however, its computational complexity is very high. In this letter, we propose a signal detection method for orthogonal space-time coded OFDM systems that achieves the identical error performance as the ML method, but requires much less computational complexity.