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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    Title :

    A Novel Spherical Codebook Design for Uplink SCMA in Satellite Communications


    Contributors:
    Zhao, Lingli (author) / Wang, Chaowei (author) / Pang, Mingliang (author) / Wang, Wenyuan (author) / Wang, Weidong (author) / Jiang, Fan (author) / Xu, Lexi (author)


    Publication date :

    2024-06-24


    Size :

    590455 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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