Sparse code multiple access (SCMA) is a new nonorthogonal multiple access scheme, which effectively exploits the constellation shaping gain of multi-dimensional codebook. In this paper, we propose a new SCMA architecture of uplink satellite communication system. At the transmitter, we group the users and design a practical spherical codebook. At the receiver, a low-complexity multi-user detection algorithm, namely logarithm domain message passing algorithm (Log-MPA) is implemented. The results show that the reliability of the proposed codebook outperforms the existing SCMA codebook schemes in both AWGN and Rayleigh channels.


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    Titel :

    A Novel Spherical Codebook Design for Uplink SCMA in Satellite Communications


    Beteiligte:
    Zhao, Lingli (Autor:in) / Wang, Chaowei (Autor:in) / Pang, Mingliang (Autor:in) / Wang, Wenyuan (Autor:in) / Wang, Weidong (Autor:in) / Jiang, Fan (Autor:in) / Xu, Lexi (Autor:in)


    Erscheinungsdatum :

    24.06.2024


    Format / Umfang :

    590455 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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