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Computationally Efficient Signal Detection for STBC-OFDM Systems in Fast-Fading Channels
Kyu In LEE Jaekwon KIM Yong Soo CHO
IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
OFDM, STBC, fast fading, ML, MML,
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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.