Data Sequence Mapping and Substitution for PAPR Reduction in OTFS 


Vol. 50,  No. 10, pp. 1545-1551, Oct.  2025
10.7840/kics.2025.50.10.1545


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  Abstract

Multicarrier systems, such as Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Time Frequency Space (OTFS), suffer from high Peak-to-Average Power Ratio (PAPR), which degrades the efficiency of high-power amplifiers. To address the PAPR issue in OTFS, Discrete Fourier Transform spread OTFS (DFT- s-OTFS) has been proposed, which reduces PAPR through DFT precoding. However, this process leads to bit error rate (BER) performance degradation in high-speed mobile environments due to diversity loss. In this paper, we propose a PAPR reduction scheme that effectively lowers the PAPR while preserving the diversity of OTFS by substituting high-PAPR data sequences with low-PAPR ones. To this end, the Hungarian algorithm is employed to establish optimal mapping relationships between data sequences, which are then used for substitution. Simulation results demonstrate that the proposed scheme achieves lower PAPR and improved BER performance compared to conventional OTFS and DFT-s-OTFS.

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[IEEE Style]

S. Park, H. Lee, K. Ryu, K. Choi, "Data Sequence Mapping and Substitution for PAPR Reduction in OTFS," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 10, pp. 1545-1551, 2025. DOI: 10.7840/kics.2025.50.10.1545.

[ACM Style]

Sangwook Park, Hyeongwon Lee, Kwanwoong Ryu, and Kwonhue Choi. 2025. Data Sequence Mapping and Substitution for PAPR Reduction in OTFS. The Journal of Korean Institute of Communications and Information Sciences, 50, 10, (2025), 1545-1551. DOI: 10.7840/kics.2025.50.10.1545.

[KICS Style]

Sangwook Park, Hyeongwon Lee, Kwanwoong Ryu, Kwonhue Choi, "Data Sequence Mapping and Substitution for PAPR Reduction in OTFS," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 10, pp. 1545-1551, 10. 2025. (https://doi.org/10.7840/kics.2025.50.10.1545)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880