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    Forward-Backward Block-wise Channel Tracking in High-speed Underwater Acoustic Communication

    Access Status
    Fulltext not available
    Authors
    Chen, Peng
    Rong, Yue
    Nordholm, Sven
    He, Z.
    Date
    2015
    Type
    Conference Paper
    
    Metadata
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    Citation
    Chen, P. and Rong, Y. and Nordholm, S. and He, Z. 2015. Forward-Backward Block-wise Channel Tracking in High-speed Underwater Acoustic Communication, in Doug Wilson (ed), MTS/IEEE OCEANS 2015, Oct 19 2015. Washington, DC, USA: IEEE.
    Source Title
    Proceedings of the MTS/IEEE OCEANS 2015
    Source Conference
    MTS/IEEE OCEANS 2015
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/7849
    Collection
    • Curtin Research Publications
    Abstract

    Block-by-block decision-directed channel tracking is a bandwidth efficient channel estimation method for coherent underwater acoustic (UA) communication. However, conventional forward-only decision-directed method suffers from error propagation where the system bit-error-rate (BER) increases with theinterval between the pilot sequence and data symbols. To mitigate the error propagation effect, in this paper, a forward-backward decision-directed algorithm is proposed to detect data blocks which are at large internal from the previous pilot sequence but close to the next one. The proposed algorithm is applied to detect data received during the experiment conducted in December 2012 in the Indian Ocean off the Rottnest Island, Western Australia. The results show that using the proposed algorithm, the average uncoded BER of the last data block in one frame is much lower than the BER yielded by the forward-only tracking method and is only sightly higher than the BER of the first data block.

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