Browsing by Subject "Correlated sources"

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    Exchange of correlated binary sources in two-way relay networks using LDPC codes
    (Institute of Electrical and Electronics Engineers Inc., 2017) Salim, A.; Duman, T. M.
    We consider the problem of exchanging messages in two-way relay (TWR) systems when the sources are correlated binary sequences. In a TWR system, two users communicate simultaneously in both directions to exchange their messages with the help of a relay. Harnessing the fact that the users have access to their own non-compressed messages as side information, each user can compress its message according to the Slepian-Wolf coding strategy by using low-density parity-check codes, particularly, the syndrome approach. Through numerical examples, we show that the proposed scheme offers significant improvements in compression rates compared to the existing solutions in the literature.
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    Lossless polar compression of g-ary sources
    (IEEE, 2013) Çaycı, Semih; Arıkan, Orhan
    In this paper, lossless polar compression of g-ary memoryless sources in the noiseless setting is investigated. Polar compression scheme for binary memoryless sources, introduced by Cronie and Korada, is generalized to sources over prime-size alphabets. In order to reduce the average codeword length, a compression scheme based on successive cancellation list decoding is proposed. Also, a specific configuration for the compression of correlated sources is considered, and it is shown that the introduced polar compression schemes achieve the corner point of the admissible rate region. Based on this result, proposed compression schemes are extended to arbitrary finite source alphabets by using a layered approach. © 2013 IEEE.