In this paper, the scheme to achieve transmit diversity in the rapidly time-varying (RTV) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) channel is studied. Concretely, two schemes named space-frequency shift keying (SFSK) and generalized SFSK (GSFSK) are proposed. In the proposed SFSK, the space-frequency dispersion matrices are constructed by the circular shifting of sparse vectors, and each modulation symbol is transmitted in one space- frequency resource block according to the pattern determined by the activated dispersion matrix. While in the proposed GSFSK, multiple dispersion matrices are activated to modulate multiple symbols in one space- frequency resource block simultaneously, and thereby a higher spectral efficiency is achieved. Next, the capacity of the proposed schemes to achieve the transmit diversity gain is validated through the analysis of the asymptotic diversity order. Moreover, a correlation-based detector is presented to reduce the detection complexity of both SFSK and GSFSK. Finally, the performance of the proposed schemes are demonstrated by computer simulations.


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    Titel :

    Space-Frequency Shift Keying in Rapidly Time-Varying MIMO OFDM Channels


    Beteiligte:
    Li, Zhenzhou (Autor:in) / Zheng, Jianping (Autor:in)


    Erscheinungsdatum :

    2018-06-01


    Format / Umfang :

    174604 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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