Future networks will need to support more usage scenarios, including higher speed scenarios and ultra-reliability scenarios for which the current waveforms are not suitable. Recently, the proposed orthogonal time frequency space (OTFS) modulation proves to be robust to Doppler spead, but it uses a conventional linear receiver which is susceptible to multipath channel gains and has high complexity. In this paper, we propose a sequence spread modulation scheme to improve system reliability. The proposed scheme spreads symbols to the Doppler domain before OTFS modulation. At the receiver, we develop a Rake receiver over the Doppler domain. Simulation results show that the performance of the proposed sequence modulation scheme is almost independent of the channel multipath gains compared to a conventional linear receiver based on OTFS, which means the performance of the proposed receiver is always close to the best performance of a linear receiver.


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    Title :

    A Sequence Spread Modulation Scheme Based on Orthogonal Time Frequency Space


    Contributors:
    Cao, Yuge (author) / Qiu, Ziyuan (author) / Long, Hang (author)


    Publication date :

    2023-06-01


    Size :

    1109175 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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