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dc.contributor.authorKu, Meng-Linen_US
dc.contributor.authorChen, Wen-Chuanen_US
dc.contributor.authorHuang, Chia-Chien_US
dc.date.accessioned2014-12-08T15:11:37Z-
dc.date.available2014-12-08T15:11:37Z-
dc.date.issued2011-05-01en_US
dc.identifier.issn1536-1276en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TWC.2011.030911.090611en_US
dc.identifier.urihttp://hdl.handle.net/11536/8910-
dc.description.abstractIn this paper, we resort to the expectation-maximization (EM) algorithm to tackle the inter-carrier interference (ICI) problem, caused by time-variant multipath channels, for both orthogonal frequency division multiplexing (OFDM) systems and bit-interleaved coded modulation (BICM)/OFDM systems. We first analyze the ICI in frequency domain with a reduced set of parameters, and following this analysis, we derive an EM algorithm for maximum likelihood (ML) data detection. An ML-EM receiver for OFDM systems and a TURBO-EM receiver for BICM/OFDM systems are then developed to reduce computational complexity of the EM algorithm and to exploit temporal diversity, the main idea of which is to integrate the proposed EM algorithm with a groupwise ICI cancellation method. Compared with the ML-EM receiver, the TURBO-EM receiver further employs a soft-output Viterbi algorithm (SOVA) decoder to exchange information with a maximum a posteriori (MAP) EM detector through the turbo principle. Computer simulation demonstrates that the two proposed receivers clearly outperform the conventional one-tap equalizer, and the performance of the TURBO-EM receiver is close to the matched-filter bound even at a normalized maximum Doppler frequency (MDF) up to 0.2.en_US
dc.language.isoen_USen_US
dc.subjectOrthogonal frequency division multiplexingen_US
dc.subjectbit-interleaved coded modulationen_US
dc.subjectinter-carrier interferenceen_US
dc.subjectexpectation-maximization algorithmsen_US
dc.subjectturbo receiversen_US
dc.titleEM-Based Iterative Receivers for OFDM and BICM/OFDM Systems in Doubly Selective Channelsen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/TWC.2011.030911.090611en_US
dc.identifier.journalIEEE TRANSACTIONS ON WIRELESS COMMUNICATIONSen_US
dc.citation.volume10en_US
dc.citation.issue5en_US
dc.citation.spage1405en_US
dc.citation.epage1415en_US
dc.contributor.department電機工程學系zh_TW
dc.contributor.departmentDepartment of Electrical and Computer Engineeringen_US
dc.identifier.wosnumberWOS:000290992300011-
dc.citation.woscount11-
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