This paper considers the performance improvement of MIMO signal separation using a linear spatial filter in a time-varying channel such as in a mobile environment. The transmission performance deteriorates due to the movement of the receiving station if the combining weight that suppresses interference signals in a packet during linear signal separation is kept fixed. In this paper, the null-space expansion technique is applied to suppress such degradation. This technique improves the robustness against the time-varying channel by additionally forming nulls that suppress inter-stream interference by utilizing the antenna degrees of freedom. The robustness against intra-packet channel fluctuation is studied by computer simulations and the improvement of error ratio performance is confirmed.


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    Titel :

    Null-Space Expansion Technique for Linear MIMO Reception over Time-Variant Channels


    Beteiligte:
    Ohi, Yuki (Autor:in) / Murata, Hidekazu (Autor:in) / Taromaru, Makoto (Autor:in) / Iwakuni, Tatsuhiko (Autor:in) / Uchida, Daisei (Autor:in) / Kita, Naoki (Autor:in)


    Erscheinungsdatum :

    01.06.2023


    Format / Umfang :

    946467 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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