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  • A Study on Reconstruction of Linear Scrambler Using Dual Words of Channel Encoder

    Author(s)
    Liu, XB
    Koh, SN
    Chui, CC
    Wu, XW
    Griffith University Author(s)
    Wu, Xin-Wen
    Year published
    2013
    Metadata
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    Abstract
    In this paper, the reconstruction of the feedback polynomial as well as the initial state of a linear feedback shift register (LFSR) in a synchronous scrambler placed after a channel encoder is studied. The study is first based on the assumption that the channel is noiseless and then extended to the noisy channel condition. The dual words, which are orthogonal to the codewords generated by the channel encoder, are used in the reconstruction algorithm. The number of bits required by the new algorithm is compared with another recently proposed algorithm and results show that the number of bits required to do the reconstruction ...
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    In this paper, the reconstruction of the feedback polynomial as well as the initial state of a linear feedback shift register (LFSR) in a synchronous scrambler placed after a channel encoder is studied. The study is first based on the assumption that the channel is noiseless and then extended to the noisy channel condition. The dual words, which are orthogonal to the codewords generated by the channel encoder, are used in the reconstruction algorithm. The number of bits required by the new algorithm is compared with another recently proposed algorithm and results show that the number of bits required to do the reconstruction can be significantly reduced.
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    Journal Title
    IEEE Transactions on Information Forensics and Security
    Volume
    8
    Issue
    3
    DOI
    https://doi.org/10.1109/TIFS.2013.2246515
    Subject
    Information and computing sciences
    Coding, information theory and compression
    Engineering
    Publication URI
    http://hdl.handle.net/10072/55469
    Collection
    • Journal articles

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