Orthogonal time frequency space (OTFS) modulation scheme is based on a novel 2-dimensional modulation technique designed to transform the time-varying multi-path channel into a time invariant Delay- Doppler channel. In general, the Message Passing (MP) algorithm works well for data detection in OTFS, but its complexity is quite large. In this paper, a low complexity MP algorithm for data detection in OTFS is presented based on a Doppler compensation precoder and a modified stopping criterion. Besides, an improved Approximate Message Passing (AMP) algorithm based on covariance processing, having almost the same complexity as that of conventional AMP algorithm, but exhibiting better bit error rate(BER) performance is presented, as demonstrated by simulation results.


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    Title :

    Low Complexity Detection Algorithms for OTFS under Rapidly Time-Varying Channel


    Contributors:
    Li, Lingjun (author) / Liang, Yu (author) / Fan, Pingzhi (author) / Guan, Yongliang (author)


    Publication date :

    2019-04-01


    Size :

    700775 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English






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