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Joint channel estimation and symbol detection for SFBC-OFDM systems via the EM algorithm

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4 Author(s)
Bing Han ; Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China ; Xiqi Gao ; Xiaohu You ; Weckerle, M.

Joint channel estimation and symbol detection for space-frequency block coded OFDM (SFBC-OFDM) systems is considered. The expectation-maximization (EM) algorithm is employed to devise both soft-in-hard-out (SIHO) maximum likelihood (ML) iterative receivers and soft-in-soft-out (SISO) maximum a posteriori (MAP) iterative receivers for SFBC-OFDM systems. Besides the low computational complexity and fast convergence, the EM-based iterative receivers also have the ability of tracing the variation of fast fading channels, and thus provide quite satisfying performance and bandwidth efficiency even in high-vehicular-speed environment. Numerical results are provided to corroborate the theoretical designs.

Published in:

Communications, 2004 IEEE International Conference on  (Volume:6 )

Date of Conference:

20-24 June 2004

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