Non-Coherent Rate-Splitting (NCRS) was recently proposed as a practical multiuser coding and decoding scheme to increase the spectral efficiency of multibeam satellite communication systems. In this paper, we further study the practical realization of NCRS. We propose a modified coding scheme (${\mathrm {NCRS}}^{*}$) that is robust to a nonzero time offset among beams. In NCRS*, as opposed to NCRS, the beams send independently channel encoded and modulated waveforms.We assess the performance of NCRS* in terms of the achievable rate region. It is shown that NCRS* performs worse than NCRS, but better than or comparable to other competing schemes, which, as opposed to NCRS*, require flexible bandwidth allocation or perfect synchronization at the transmitter. We also propose a new N-MAP algorithm for the practical implementation of NCRS* receivers. Similar to the existing UMAP algorithm, N-MAP takes into account the modulation used by, and the time offset between, the signals received from the different beams. In most cases, however, N-MAP has a significantly lower complexity than U-MAP.


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    Title :

    Non-coherent rate-splitting for multibeam satellite forward link: practical coding and decoding algorithms


    Contributors:
    Noels, N. (author) / Moeneclaey, M. (author) / Ramirez, T. (author) / Mosquera, C. (author) / Caus, M. (author) / Pastore, A. (author)


    Publication date :

    2020-05-01


    Size :

    345017 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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