Recently, Zak transform based orthogonal time frequency space (OTFS) waveform has generated new research interest owing to its better robustness to large channel spreads compared to that of the widely researched OTFS waveform based on inverse symplectic finite Fourier transform (ISFFT) and Heisenberg transform (HT). In this paper, we investigate the peak-to-average power ratio (PAPR) characteristics of discrete Zak transform based OTFS (DZT-OTFS), which has not been reported. We derive an upper bound on the PAPR of DZT-OTFS waveform for general transmit pulse shapes and a tighter upper bound for rectangular pulse, using Cauchy-Schwartz inequality. The PAPR upper bound for DZT-OTFS and two-step OTFS (based on ISFFT and HT) are shown to be the same for rectangular pulse, and hence the PAPR of DZT-OTFS with rectangular transmit pulse shape grows linearly in the number of Doppler bins. With non-rectangular transmit pulse, the results on complementary cumulative distribution function (CCDF) of PAPR show that DZT-OTFS can have better PAPR characteristics compared to that of two-step OTFS.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    On the PAPR of Discrete Zak Transform Based OTFS Modulation


    Contributors:


    Publication date :

    2024-06-24


    Size :

    1376887 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Exploiting OTFS Frame Structure for PAPR Reduction

    Sumer, Ahmet Sacid / Yilmaz, Talha / Memisoglu, Ebubekir et al. | IEEE | 2022


    A Low-Complexity Standard-Compliant PAPR Reduction Scheme for OTFS Modulation

    Sharma, Salil / Shah, Syed Waqas Haider / Widmer, Joerg | IEEE | 2024


    Diversity and PAPR Enhancement in OTFS using Indexing

    Francis, Jickson K / Mary Augustine, Rose / Chockalingam, A. | IEEE | 2021



    Spectrally Precoded OTFS Modulation

    Chen, Wei-Chang / Lu, Chang-Hung / Chung, Char-Dir | IEEE | 2022