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Reduced Complexity MLSD Equalizers Based on Bidirectional DFEs Jangwoo PARK Youngsun HA Wonzoo CHUNG Publication IEICE TRANSACTIONS on Communications Vol.E95-B No.11 pp.3432-3436 Publication Date: 2012/11/01 Online ISSN: 1745-1345 DOI: 10.1587/transcom.E95.B.3432 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Fundamental Theories for Communications Keyword: Equalizer, time-reversal diversity, MLSD equalizer, bidirectional DFE, bidirectional arbitrated DFE (BAD), Full Text: PDF>>
Summary: We propose a reduced complexity maximum likelihood sequence detection (MLSD) equalizer for wireless communications using bidirectional decision feedback equalizers (DFEs). We apply reduced-length two-level estimates produced by a bidirectional DFE. Therefore, the computationally expensive MLSD algorithm is applied sparingly for two-level signals with the effective channel length shorter than the original channel, regardless of the original constellation size of the symbols. Simulation results show that the proposed algorithm outperforms existing combination schemes based on bidirectional DFEs, especially for large constellations. | |||||
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